ARBA UNIVERSITY BAHIRMINCH DAR UNIVERSITY SAWLAACADEMY CAMPUS SPORT DEPARTMENT OF SPORT SCIENCE UNIT OF BASIC SCIENCE AND HUMANITIES PHYSICAL FITNESS Course for UG Regular Students BY: WAS 1February 2021 REMEMBER: 2 UNIT ONE CONCEPTS OF PHYSICAL FITNESS UNIT OBJECTIVE By the end of this unit you should be able to: Define physical fitness, physical activity, physical exercise and sport Recognize the benefits of physical fitness Realize general principles of fitness training Make behavior modification to stay fit INTRODUCTION Physical fitness: It is an ability to meet the ordinary, as well as unusual demands of daily life safely and effectively without being overly fatigued. Simply it is the body‘s ability to function effectively and efficiently, and contributes the total quality of life. …CONT’D Fitness isn’t just about being able to do sit-ups and run fast. Fitness is : “the ability to meet the demands of the environment” It includes home, work, family and friends – All of them make demands on you. Meeting the demands means carrying out tasks and activities. …CONT’D Sport: It is organized competitive activities governed by rules that standardize the competition and conditions so individuals can compete fairly. Sport is, above all, competitive activity. We cannot think of sport without thinking of competition. without the competition, sport becomes simply play or recreation. …CONT’D Physical Activity: Any bodily movement produced by the contraction of the skeletal muscles that increases energy expenditure above the baseline level. Exercise: a Physical activity that is planned, structured, and repetitive with the purpose of developing, improving, or maintaining physical fitness. …CONT’D Play: is considered to be a free activity, generally non serious Game: is a competitive activity or sport in which players contend with each other according to a set of rules. Recreation: is an activity engaged in during leisure and satisfaction. motivated by the personal Definition Training principle: • Is a guideline for the development of the efficient program to improve personal fitness. Efficient and Safety Before starting the planned training the following points should be considered. Past medical history Present health Previous involvement in physical activity Present fitness level Goals Follow planned program to avoid injury …Cont’d A training programme to improve performance should obey the following principles of training. Specificity Adaptability Progression FITT Principle Overload Individuality Reversibility Rest and recovery Tedium/variety Warming up and cool down PRINCIPLES OF WARMING UP The purpose of the warm-up is to prepare trainee’s for the training to follow. During the warm-up: 1. Pulse rate should be gradually raised. 2. Joint flexibility should be addressed through a series of moderate stretching and mobility exercises. 3. body temperature is raised, which is one of the main factors in facilitating performance. 4. Skills that are part of the activity can be part of your warm up. 5. Performer to become mentally focused on the activity. …cont’d Warm ups are needed to prepare the body for effort, to increase the core temperature, and to help prevent injury. They should be gentle and rhythmic and use those muscles to be involved in the main activity, and should take up 10% to 20% of the time in the primary exercise. Warm up environment Where possible the warm-up environment should resemble that of the competition. Example – Swimmers should warm up in a practice pool, weightlifters should warm up in a weight-room. PRINCIPLES OF OVERLOAD ‘The more you do, the more you will be capable of doing’ Over load principle is systematically increasing the amount of load. Quite simply, we can only achieve improvements in most aspects of physical performance by forcing the body to work beyond it’s current known limits. …cont’d Example – to improve our aerobic fitness by running, we could run more times a week, complete the run in a shorter time or increase the distance we run. Each one of these will overload the aerobic system. The aerobic system will gradually adapt to cope with the overload and we will become fitter. THE F.I.T.T. PRINCIPLE An easy way to get started on developing a personal fitness program is utilizing the F.I.T.T. principle. Frequency: how often you will exercise Intensity: how hard of the exercise Time: How long each individual session should last Type: What type of exercise will you be doing Summary of FITT PRINCIPLES OF PROGRESSION Progression means gradually increasing the amount of exercise you do. The body takes time to adapt to more frequent or harder exercise. We must build up stress on our bodies in a gradual, or progressive way – by lifting heavier weights or running further. If a coach increases the training too quickly, the body will not have time to adapt and this may result in injury. Slow and steady progress is the best way forward. …cont’d To steadily improve fitness levels, physical demands to overload an athlete’s system must continually increase. If the training demand is increased too quickly, players will be unable to adapt and may break down. PRINCIPLES OF SPECIFICITY “You get what you train for” Every type of exercise has a particular effect on the body. The type of training we choose must be right for the type of improvement we want to see. This principle is just how it sounds...how you exercise should be specific to your goals. If your main goal is simply health, fitness and weight management, you should focus on total body strength, cardio and a healthy diet. Make sure your training matches your goals. …cont’d • You must do specific types of activity to improve specific parts of the body in specific ways. • Different events can require very different forms of training. For example, if you’re training for a weightlifting competition, it’s no use going swimming every day. You need to concentrate on strength training for your arms and legs. PRINCIPLES OF VARIATION Variety is the spice of life. If you do the same thing week after week it becomes monotonous and boring. A training program should include a variety of training methods. This will help to maintain interest and motivation and makes sure that the loads you work against are varied. This principle also implies that exercises and activities should be change regularly so that players do not overstress a certain part of the body. Mixing up activities also maintains interest in training. …cont’d Our training programme must be varied to avoid tedium – boredom. By using a variety of different training methods we will keep our enthusiasm and motivation. We can follow a long work out with a short one, a hard session with a relaxed one or a high speed session with a slow one. We may be able to change the way we train and where we train. …cont’d Circuit Training is an excellent way to avoid Tedium. PRINCIPLES OF ADAPTION Adaption refers to the body’s ability to adjust to increased or decreased physical demands. Repeatedly practicing a skill or activity makes it second nature and easier to perform. This principle explains why beginning exercisers are often sore after starting a new routine, but after doing the same exercise for a period, they have little, if any, muscle soreness. …cont’d In addition, adaptation makes an athlete very efficient and allows him to expend less energy doing the same movements. Adaptions to the demands of training occur gradually, over long periods of time and trying to accelerate this process may lead to injury, illness or overtraining. THE REST AND RECOVERY PRINCIPLE “The more you train the more sleep your body needs.” While we often focus on getting in as much exercise as possible, rest and recovery is also essential for reaching your weight loss and fitness goals. While you can often do cardio every day (though you may want to rest after very intense workouts) you should have at least a day of rest between strength training workouts. …cont’d Make sure you don't work the same muscles two days in a row to give your body the time it needs to rest and recover. The body cannot repair itself without rest and time to recover. Both short periods like hours between multiple sessions in a day and longer periods like days or weeks to recover from a long season are necessary to ensure your body does not suffer from exhaustion or overuse injuries. PRINCIPLES OF REVERSIBILITY "use it or lose it." When player stops training, their gains will disappear quicker than they were gained. The rate of decline for athletes will depend on the length of training before detraining, the specific muscle group and other factors. Maintaining a moderately high level of fitness year-round is easier than detraining at the end of the season and then retraining at the beginning of the next. …cont’d To avoid detraining, never take a complete break, even when injured the uninjured parts of the body need to be trained Detraining affects all fitness components but aerobic losses are more rapid than strength / power losses (results of 5 months of endurance training can be lost in 6 – 8 weeks) but it will lose our gains in strength after about 12 weeks of inactivity PRINCIPLES OF INDIVIDUAL RESPONSE “Not all athletes created equal ” Each athlete will respond differently to the same training stimulus. Some people are able to handle higher volumes of training while others may respond better to higher intensities. …cont’d There are many factors that alter the training response: genetic ability, predominance of muscle fiber types, chronological or athletic age, mental state, maturity, nutrition, prior training, environment, sleep, rest, stress, illness or injury, and motivation, and other factors in your life, PRINCIPLES OF COOL-DOWN Vital to return the body to a resting state. It helps the muscles return blood to the heart, rather than pool in the muscles, and also helps prevent the build-up of lactic acid in the muscles. A cool-down brings the body back to its normal functions. During a cool-down of 20 minutes, athletes perform activities that facilitate faster regeneration and recovery from strains of training. …cont’d Why cool down? It is the exact opposite of the warm up. The body has been working at a maximum level in competition or in training and must be allowed to return gradually to it’s normal resting rate. UNIT TWO COMPONENTS OF PHYSICAL FITNESS UNIT OBJECTIVE At the end of this unit you should be able to; Identify the five components of health related physical fitness components Analyze health risks associated with excessively low body fatness Understand health risks associated with over fatness Appreciate and value the benefits of regular physical exercise to healthy living. Recognize the means and methods of developing the INTRODUCTION • The components of physical fitness are divided into two categories: Health Related and Skill Related. Health related fitness Skill Related Fitness o Cardiovascular Fitness o Strength o Balance o Muscular Endurance o Speed o Flexibility o Reaction Time o Power o Agility o Body Composition o Co-ordination HEALTH –RELATED PHYSICAL FITNESS 1. CARDIOVASCULAR FITNESS It is a measure of a heart‘s ability to pump oxygen-rich blood to the working muscles during exercise. In practical terms, cardiorespiratory endurance is the ability to perform endurance-type exercise such as (distance running, cycling, swimming, etc.). Generally capable of performing 30 to 60 minutes of vigorous exercise without undo fatigue. EXERCISE PRESCRIPTION FOR CARDIO RESPIRATORY FITNESS Warm-Up: Every workout should begin with a warm-up. A warm-up usually consists of 5 to 15 minutes of slow-paced exercise. A warm-up routine for someone who will be jogging for (the cardio respiratory workout might consist of the following steps: 1. 1 to 3 minutes of light calisthenics 2. 1 to 3 minutes of walking at a pace that elevates heart rate by 20 to 30 beats/min above rest. 3. 2 to 4 minutes of stretching (optional) 4. 2 to 5 minutes of jogging at a slow pace to gradually elevate the heart rate toward the desired target heart rate (discussed later in the section on intensity). …CONT’D Workout: Mode: walking, jogging, cycling, and swimming. In general, any activity that uses a large muscle mass (e.g., the legs) in a slow, rhythmical pattern Frequency: three to five sessions per week to achieve near-optimal gains in cardiorespiratory fitness and minimal risk of injury. If training is injury-free, the frequency can be increased to 5 days per week if desired. Duration: Recall that, duration of exercise does not include the warm-up or cool-down. In general, exercise durations in improving cardio respiratory fitness are between 20 and 60 minutes. …CONT’D Intensity: exercise intensity for improving health-related physical fitness is between 50% and 85% VO2 max. The most popular method of determining THR is the percentage of maximal heart rate (MHR) method. This method works on the principles that exercise intensity (i.e., % VO2 max) For example, the maximal HR of a 20-year-old college student can be estimated by the following formula. HR max = 220 - 20 = 200 beats/min The THR is then computed as 200 beats/min x 0.70 = 140 beats/min 200 beats/min x 0.90 =180 beats/min THR = 140 to 180 beats/min In this example, the THR to be maintained during a workout to improve cardiorespiratory fitness is between 140 and 180 beats/min; this range of exercise intensities is sometimes called the training sensitive zone. Activity: Calculate the high and low ends of your THR range based on the above formula. …CONT’D Safety: The optimal exercise intensity to improve cardio respiratory fitness without increasing the risk of injury is between 60% and 80% of VO2 max (73-87% HR max). Further, note that the optimal frequency and duration are 3 to 4 days/ week and 20 to 60 minutes/day, respectively. …CONT’D Cool-Down Every training session should conclude with a cool-down (5-15 minutes of light exercises and stretching). A primary purpose of a cool-down is to promote blood return to the heart, thereby preventing blood from pooling in the arms and legs, which could result in dizziness 2. MUSCULAR STRENGTH Is the ability of the muscles to exert an external force or to lift a heavy weight. Or The amount of force a muscle can produce with a single maximum effort. A fit person can do work or play that involves exerting force, lifting or controlling one’s own body weight. 3. MUSCULAR ENDURANCE Is the ability of a muscle of group of muscles to remain contracted or to contract repeated (exert) for a long period of time. A fit person can repeat movement for a long period without undue fatigue. running swimming MUSCLE STRUCTURE AND CONTRACTION Muscle Structure: Skeletal muscle is a collection of long thin cells called fibers. Muscles are attached to bone by connective tissues known as tendons. Muscular contraction causes the tendons to pull on the bones, thereby causing movement. Muscle Contraction: is regulated by signals coming from motor nerves. Motor nerves originate in the spinal cord and send nerve fibers to individual muscles throughout the body. …CONT’D Muscle contractions are classified into two major categories: isotonic and isometric. I. Isotonic (dynamic) contractions: • Alters the length of muscles. • There is joint movement. • Muscles working through a range of motion. Example: Lifting weights, swimming, rock climbing, cycling Isotonic contractions can be further subdivided into concentric, eccentric, and isokinetic contractions. …CONT’D II. Isometric (static) contraction: • Doesn't altering the length of muscles • There is no joint movement. • Hold a pose for as long as you can • Don't move or put your muscle(s) through any range of motion. Example: 1) Holding a dumbbell in one hand 2) Holding a static pushup position 3) Pushing against an immovable object, such as a wall. MUSCLE FIBER There are three types of skeletal muscle fibers: Slow twitch, Fast twitch, and Intermediate muscle fibers 1. Slow-Twitch Fibers: As the name implies slow-twitch fibers contract slowly and produce small amounts of force; however, these fibers are highly resistant to fatigue. Slow-twitch fibers, which are red in appearance, have the capacity to produce large quantities of ATP aerobically, making them ideally suited for a low-intensity prolonged exercise like walking or slow jogging. 2. Fast-Twitch Fibers: are contract rapidly and generate great amounts of force but fatigue quickly. White and have a low aerobic capacity, but they are well equipped to produce ATP anaerobically. Are used during activities requiring rapid or forceful movement, such as jumping, sprinting, and weight lifting. 3. Intermediate Fibers: Are although more red in color, possess a combination of the characteristics of fast- and slow-twitch fibers. Are contract more quickly and produce more force than slow-twitch fibers but contract more slowly and produce less force than fast- twitch fibers. They are more fatigue resistant than fast-twitch fibers but less fatigue resistant than slow-twitch fibers. 4. FLEXIBILITY Flexibility is the ability to move joints freely through their full range of motion. It is affected by muscle length, joint structure, and other factors. A fit person can move the body joint through a full range of motion in work and in play. …CONT’D Flexibility can be improved by stretching the muscles and tendons and by extending the ligaments and supporting tissues beyond their normal range of movement. There are 3 different types of stretching A. Static Stretching - Extending a limb beyond its normal range. The position is held for at least 10 seconds. B. Active/Dynamic Stretching – Extending a joint beyond its normal limit, and repeats this rhythmically over a period of 20 seconds. C. Passive Stretching – Joint flexibility is improved by external force caused by partners or coaches who move the limb to its end position and keep it there for a few seconds. EXERCISE PRESCRIPTION FOR IMPROVING FLEXIBILITY The frequency and duration of a stretching exercise prescription should be 2 to 5 days per week for 10 to 30 minutes each day. The first week should consist of one stretching session, with one session added per week during the first 4 weeks of the slow progression phase of the program. Initially, the duration of each training session should be approximately 5 minutes, increasing gradually to approximately 20 to 30 minutes following 6 to 12 weeks of stretching during the slow progression phase. The physiological rationale for increasing the duration of stretching is that each stretch position is held for progressively longer durations as the program continues. For example, begin by holding each stretched position for 15 seconds, and then add 5 seconds each week up to 30 seconds. Start by performing each of the exercises once (1 rep) and progress to 4 reps. 5. BODY COMPOSITION Is the relative proportion (percentage) of muscle, fat, bone, water and other tissues that comprise the body. A fit person has a relatively low, but not too low, percentage of body fat (body fatness). WOMEN Essential fat 10-12% Athletes 14-20% Women Fitness 21-24% Acceptable 25-31% Obese 32% or more MEN Essential fat 2-4% Athletes 6-13% Fitness 14-17% Acceptable 18-25% Obese 26% or more PRINCIPLES OF EXERCISE PRESCRIPTION FOR HEALTH AND FITNESS Doctors often prescribe medications to treat certain diseases, and for every individual there is an appropriate dosage of medicine to cure an illness. Similarly, for each individual, there is a correct dosage of exercise to effectively promote physical fitness, called an exercise prescription. Exercise prescriptions should be tailored to meet the needs of the individual. It should include fitness goals, mode of exercise, a warm-up, a primary conditioning period, and a cool-down. The following sections provide a general introduction to each of these components. 1. FITNESS GOALS A logical and common type of fitness goal is a performance goal. You can establish performance goals in each component of health-related physical fitness. In addition to performance goals, consider establishing exercise adherence goals. That is, set a goal to exercise a specific number of days per week. Exercise adherence goals are important because fitness will improve only if you exercise regularly! IN WRITING YOUR PERSONAL FITNESS GOALS, CONSIDER THE FOLLOWING GUIDELINES: Set Realistic Goals Establish Short-Term Goals First Set Realistic Long-Term Goals Establish Lifetime Maintenance Goals List Goals in Written Form Recognize Obstacles to Achieving Goals Table Fitness improvement goals 2. MODE OF EXERCISE Every exercise prescription includes at least one mode of exercise that is, a specific type of exercise to be performed. For example, to improve cardio respiratory fitness, you could select from a wide variety of exercise modes, such as running, swimming, or cycling. Key factors to consider when selecting an exercise mode are enjoyment, availability of the activity, and risk of injury. 3. WARM-UP A warm-up is a brief (5- to 15-minute) period of exercise that precedes the workout. It generally involves light calisthenics or a low-intensity form of the actual mode of exercise and often includes stretching exercises as well. The purpose of a warm-up is to elevate muscle temperature and increase blood flow to those muscles that will be engaged in the workout. A warm-up can also reduce the strain on the heart imposed by rapidly engaging in heavy exercise and may reduce the risk of muscle and tendon injuries. 4. THE WORKOUT PLAN The major components of the exercise prescription that make up the primary conditioning period are the mode of exercise (described earlier), frequency, intensity, and duration. The frequency of exercise is the number of times per week that you intend to exercise. In general, the recommended frequency of exercise to improve most components of health-related physical fitness is three to five times per week. The intensity of exercise is the amount of physiological stress or overload placed on the body during the exercise. Time or duration of exercise also take in account to improve specific body. 5. COOL-DOWN The cool-down (sometimes called a warm-down) is a 5- to 15minute period of low-intensity exercise that immediately follows the primary conditioning period. For instance, a period of slow walking might be used as a cooldown following a running workout. The primary purpose of a cool-down is to allow blood to be returned from the muscles back toward the heart. INDIVIDUALIZING THE WORKOUT Activity How much exercise is enough? The needs and objectives of the individual. The exercise prescription should consider such factors as the individual's general health, age, fitness status, musculoskeletal condition, and body composition. …CONT’D HOW TO AVOID HAZARDOUS EXERCISES Avoid breathe holding. Try to breathe as normally as possible during the exercise. Avoid full flexion and extension of the knee, neck, or back. Do not stretch muscles that are already stretched such as the abdominal muscles Avoid extension and flexion of the spine in a forceful manner Don‘t stretch to the point of pain. Remember you want to stretch muscles, not joints! Don‘t use ballistic stretches if you have osteoporosis or arthritis. UNIT THREE HEALTH BENEFIT OF PHYSICAL ACTIVITY UNIT OBJECTIVE By the end of this unit you should be able to: Describe the health benefits of physical activity Identify diseases which are associated with a sedentary lifestyle and the major risk factors for these diseases Realize regular physical activity in terms of disease prevention and healthy aging? Estimate physical activity needed for improved health benefits? Identify physical activities suitable for typical people, and how often should they exercise? FACTS INTRODUCTION Regular physical activity and good fitness not only help to prevent diseases but also promote quality of life and feeling well. Good health related fitness can help the person feel good, look good and enjoy life. 1.PHYSICAL ACTIVITY AND HYPOKINETIC DISEASES/ CONDITIONS • • “HYPO” means “under “or “too little” and “KINETICS” means “Movement” or “activity”. Thus, hypokinetic means “too little activity”. A hypokinetic diseases or condition is associated with lack of physical activity or too little regular exercise. Individuals who do not exercise regularly are at a greater risk for developing chronic diseases such as: coronary heart disease (CHD), hypertension, hypercholesterolemia, cancer, obesity, and musculoskeletal disorders. …CONT’D Summary of diseases caused by physical inactivity …CONT’D (CDC) and (ACSM) recommended accumulate 30 min or more of moderate-intensity physical activity on most, preferably all, days of the week. Such activities like cooking, shopping, and walking around the home or from the parking lot. The intensity of exercise is expressed in metabolic equivalents (METs). A MET is the ratio of the person‘s working (exercising) metabolic rate to the resting metabolic rate. SUMMARY OF THE ACSM AND AHA PHYSICAL ACTIVITY RECOMMENDATIONS FOR ADULTS One MET is defined as the energy cost of sitting quietly. GENERALLY, PHYSICAL ACTIVITY LOWERS THE RISK OF HYPOKINETIC CONDITIONS INCLUDING dying prematurely, coronary artery disease, stroke, type 2 diabetes, metabolic syndrome, high blood lipid profile, cancers (colon, breast, lung, and endometrial), and hip fractures. abdominal obesity and feeling of depression and anxiety. In weight loss, IT ALSO HELPS IN Weight maintenance and prevention of weight gain, prevention of fails, Increased bone density, Improved functional health Improved cognitive function, Improved quality of sleep. …CONT’D 2. PHYSICAL ACTIVITY AND CARDIOVASCULAR DISEASES According (WHO, 2011) CVD caused 17.3 million deaths (30%) worldwide in 2008, and it is projected to cause more than 26 million deaths by 2030. More than 80% of those cardiovascular deaths occurred in low- and middle-income countries. A. CORONARY HEART DISEASE (CHD): This is the heart disease, involves damage to the vessels that supply blood to the heart muscle. The principal cause for the development of CHD is atherosclerosis. Atherosclerosis is a slow, progressive hardening and narrowing of arteries that can begin in childhood. Arteries become narrowed by deposits of fat, cholesterol, and other substances . This narrowing stems from the long term build up of fatty deposits, called plaque, on the inner walls of the arteries . …CONT’D Some arteries of the heart can become so blocked (occluded) that all blood supply is stopped. Heart muscle tissue begins to die when it is deprived of oxygen and nutrients. This damage is known as myocardial infarction. In lay terms, this event is called a heart attack. Arteriosclerosis is hardening of the arteries due to conditions that cause the arterial walls to become thick hard and non- elastic. THE MAIN RISK FACTORS FOR CHD: Age, Family History, Hypercholesterolemia, Hypertension, Tobacco use, Diabetes Mellitus or Prediabetes, Overweight and Obesity, and Physical Inactivity. B. HYPERTENSION Hypertension, or high blood pressure, is a chronic, persistent elevation of blood pressure that is clinically defined as systolic pressure ≥140 mmHg and diastolic pressure ≥90 mmHg. Short periods of high blood pressure are normal, but when blood pressure that is continually at an abnormally high level is known as hypertension. Blood pressure is measured with sphygmomanometer. …CONT’D BLOOD PRESSURE CLASSIFICATION FOR HEALTHY ADULTS Category Goal (Optimal) Normal High- Normal Stage 1 Hypertension Stage 2 Hypertension Stage 3 Hypertension Systolic (mm Hg) Diastolic (mm Hg) Below 120 Below 130 130 – 139 140 – 159 160 – 179 180 and above Below 80 Below 85 85 – 89 90 – 99 100 – 109 110 and above EXERCISE PRESCRIPTION FOR INDIVIDUALS WITH HYPERTENSION (ACSM, 2013) Mode: Primarily endurance activities supplemented by resistance exercises Intensity: Moderate-intensity endurance (40–60% VO 2 R)* and resistance training (60–80% 1- RM) Duration: 30–60 min or more of continuous or accumulated aerobic physical activity per day, and a minimum of one set (8–12 reps) of resistance training exercises for each major muscle group. Frequency: Most, preferably all, days of the week for aerobic exercise; 2 or 3 days/week for resistance raining. *VO2R is the difference between the maximum and the resting rate of oxygen consumption. C. HYPER- CHOLESTEROLEMIA AND DYSLIPIDEMIA Hypercholesterolemia, is an elevation of total cholesterol (TC) in the blood, is associated with increased risk for CVD. Also referred to as hyperlipidemia, which is an increase in blood lipid levels; dyslipidemia refers to an abnormal blood lipid profile. Approximately 18% of strokes and 56% of heart attacks are caused by high blood cholesterol (WHO, 2002). Age, gender, family history, alcohol, smoking are risk factors for hypercholesterolemia and regular activity reduced the chance of getting hypercholesterolemia and dyslipidemia. …CONT’D Regular physical activity, especially habitual aerobic exercise, positively affects lipid metabolism and lipid profiles. D. DIABETES MELLITUS Diabetes is a global epidemic and more than 346 million people worldwide have the disease (WHO, 2011). Factors linked to this epidemic include urbanization, aging, physical inactivity, unhealthy diet, and obesity. At least 65% of people with diabetes mellitus die from some form of heart or blood vessel disease (AHA, 2008). Diabetes is a major contributor toward the development of CHD and stroke. Also, diabetes is among the leading causes of kidney failure; 10% to 20% of people with diabetes die of kidney failure (WHO, 2008). …CONT’D Diabetes classified in two forms. Type 1, formerly referred to as insulin-dependent diabetes mellitus (IDDM), usually occurs before age 30 but can develop at any age. Type 2, previously known as non-insulin-dependent diabetes mellitus (NIDDM), is more common; 90% of individuals diagnosed with diabetes mellitus worldwide have type 2 diabetes (WHO, 2011). Nearly 90% of cases of type 2 diabetes worldwide may be related to obesity (Wagner and Brath 2012). RISK FACTORS FOR DEVELOPING DIABETES: Age, gender, family history, calorie intake, physical inactivity HOW CAN REDUCE RISK OF DIABETES? Healthy nutrition and Increased physical activity, however, can reduce the risk of type 2 diabetes by as much as 67% in high-risk individuals E. OBESITY AND OVERWEIGHT Over weight is usually defined as total body weight above the recommended range for good health. Doctors usually define overweight as a condition in which a person's weight is 1%-19% higher than normal, as defined by a standard height/weight chart. Obesity (Extreme over fatness) is severally overweight, characterized by an excessive accumulation of body fat 25% of body weight or more as fat in men, and 32% or more as fat in women. FACTORS CONTRIBUTING TO EXCESS BODY FAT (CAUSES OF OBESITY) : Age, Gender, Genetics (family history), Cholesterol intake, overfed and Physical inactivity F. AGING A sedentary lifestyle and lack of physical activity reduce life expectancy by predisposing the individual to aging-related diseases and by influencing the aging process itself. With aging, a progressive loss of physiological and metabolic functions occurs; however, biological aging may differ considerably among individuals due to variability in genetic and environmental factors that affect oxidative stress and inflammation. …CONT’D Telomeres are repeated DNA sequences that determine the structure and function of chromosomes. With aging and diseases associated with increased oxidative stress (e.g., CHD, diabetes mellitus, osteoporosis, and heart failure), telomere length decreases. Thus, regular exercise benefits in retarding the aging process and diminishing the risk of aging-related diseases. 3. PHYSICAL ACTIVITY AND POSTURAL DEFORMITY Posture is the position from which movement begins and ends. Having proper postural alignment enables the body to perform movements quicker with less joint and muscular strain. The body is designed to work at the most economical level, thus saving energy for future use. We spend more energy maintaining misaligned posture, which can cause muscle and joint pain. …CONT’D To improve your posture and reduce structural damage, you should adhere to a corrective postural exercise program. This simple yet productive program will combat the effects of bad posture and help alleviate joint and muscle pain. Exercises for correcting posture: Prone Cobra Axial Extension Trainer Wall Leans Cervical Extension using a blood pressure cuff MUSCULOSKELETAL DISEASES AND DISORDERS Osteoporosis, osteoarthritis, bone fractures, connective tissue tears, and low back syndrome, are also related to physical inactivity and a sedentary lifestyle. Osteoporosis is a disease characterized by the loss of bone mineral content and bone mineral density due to factors such as aging, amenorrhea, malnutrition, menopause, and physical inactivity. It is becoming a major health issue, with an osteoporotic fracture occurring every 3 seconds worldwide. …CONT’D Wrist fractures precede the most common osteoporotic fracture, vertebral fractures. However, hip fractures are the most devastating Osteopenia, or low bone mineral mass, is a precursor to osteoporosis. More than one of every two adults aged 50 or older has either osteoporosis or osteopenia Adequate calcium intake, vitamin D intake, and regular physical activity help counteract age-related bone loss. EXERCISE PRESCRIPTION FOR PRESERVING BONE HEALTH OF ADULTS (ACSM) Mode: Weight-bearing endurance activities (e.g., stair climbing, jogging), activities that involve jumping (e.g., basketball, plyometrics), and resistance training Intensity: Moderate to high, in terms of bone-loading forces Frequency: 3–5 times per week for weight-bearing endurance activities; 2 or 3 times per week for resistance exercise Duration: 30–60 min/day of a combination of weight-bearing endurance activities, activities that involve jumping, and resistance training that targets all major muscle groups UNIT FOUR NUTRITION AND DIET UNIT OBJECTIVE At the end of this unit you should be able to; Define macronutrients and micronutrients Summarize the basics of nutrition Categorize and describe the types of nutrients and body‘s sources of energy List types of food intake before, during and after exercise Can customize proper way of eating and DEFINITION: Nutrition: is the science of the action of food, beverages, and their components in biological systems. Nutrient: is a chemical substances that are found in the food a person eats and/or drinks. Macronutrients are the nutrients the body needs in larger amounts. Micronutrients are also important nutrients, but ones the body needs in smaller amounts. The 3 most important principles of sports nutrition are as follows: Stay hydrated Provide fuel for your muscles Promote optimal recovery after exercise Apply these principles correctly as part of your training, and it will help you compete at your best There are 7 types of nutrients. Carbs Vitamins Proteins Minerals Fats Water and fibers CARBOHYDRATE: It is the ultimate source of energy Healthy sources: Whole grain cereals, breads, and pasta; fruits, vegetables, and beans Nutritional benefits: Major source of energy, vitamins, minerals, and fiber Health benefits: Regularity and the maintenance of good health Performance benefit: Carbs are your major muscle fuel source for high-intensity exercise All provides 4 calories per gram Fully rebuilding glycogen stores takes about 24 hours on a carb-based diet — but many athletes don’t get enough total carbs each day Exercise Total Daily Carbohydrate Needs 150-lb (68-kg) Athlete Light Training <1 hour, low- intensity 2.3–3.2 g of carbs per lb body weight (5–7 g per kg) 345–480 g of carbs per day Heavy Training 1–4 hours, moderate- to high-intensity 3.2–4.5 g of carbs per lb body weight (7–10 g per kg) 480–680 g of carbs per day Extreme Training > 4 hours, moderate- to high-intensity 4.5–5.5 g per lb body weight (10–12 g per kg) 680–816 g of carbs per day PROTEIN: Proteins are often called the building blocks of the body. Healthy sources: Fish, poultry, lean meats, low-fat and nonfat dairy foods, seeds, nuts, beans, and eggs Nutritional benefits: Provides amino acids, the building blocks for making proteins Health benefits: Proteins make up muscle and help build antibodies Performance benefits: Protein helps in the building and repair of muscle tissue, and works with carbs to boost the rate of recovery after exercise All provide 4 calories per gram FAT: Fat is an essential nutrient for optimal health. Healthy sources Vegetable oils like canola oil and olive oil, nuts, seeds, and fish Nutritional benefits Major source of energy; vitamins A, D, E, K; omega-3 fatty acids and other essential fats Health benefits Support the maintenance of good health Performance benefits Fats are the major muscle fuel sources for low-intensity exercise Limit certain fats Limit your intake of saturated fats and cholesterol by choosing lean meats and lowfat or nonfat dairy foods and egg whites Keep trans fats intake as low as possible by reading labels and limiting your intake of fried fast foods and commercially prepared baked goods All provide 9 calories per gram VITAMINS: The body only requires very small amounts of vitamins. The small amounts are very essential for normal functioning. Vitamins help the body release energy from foods, promote muscle and tissue growth. The correct amount of vitamins the body requires maybe obtained through good food sources or a one a day multi- vitamin. VITAMINS SOURCES MINERALS & SOURCES Minerals are inorganic molecules that serve a variety of functions within the body. Macro minerals that appear in the body in large quantities are: calcium, phosphorus, potassium, sulfur, sodium, chloride, and magnesium. Micro minerals are found in the body in smaller quantities but they are essential for the body to function. MAJOR MINERAL SOURCES Mineral Body needs Sources Calcium Bone, teeth, blood clotting, nerves, muscles Milk, sardines, dark green vegetables, nuts Chloride Nerves, muscle functions, water balance Table salt Magnesium Bone growth; nerves, muscle & enzyme function Nuts, seafood, whole grain, leafy green vegetables Phosphorus Bone, Teeth, energy transfer Meat, poultry, seafood, eggs, milk, beans Potassium Nerve, muscle function Fresh vegetables, bananas, citrus fruits, milk, meats, fish Sodium Nerve, muscle function, water balance Table salt TRACE MINERAL SOURCES Chromium Glucose metabolism Meats, liver, whole grains & dried beans Copper Enzyme function, energy production Meats, seafood, nut, & grains Fluoride Bone & teeth growth Drinking water, fish & milk Iodine Thyroid hormone formation Iodized salt & seafood Iron O2 transport red blood cells Red meat, liver, eggs, beans, leafy & enzyme function vegetable & shellfish Manganese Enzyme function Whole grains, nuts, fruits & vegetables Molybdenum Energy metabolism in cells Whole grains, organ meats, peas & beans Selenium Works with vitamin E Meat, fish, whole grains & eggs Zinc Part of enzyme growth Meat, shellfish, yeast & whole grain WATER WATER IMPORTANCE OF WATER TIPS IN MEAL At meals: Fill half (50%) of your plate with a variety of carbohydrate-based foods like fruit, cereals, pasta, bread, potatoes, and vegetables Fill 35% of your plate with fat content of foods, such as meat, egg yolks, yogurt, cheese, butter, milk. Fill the other 15% of your plate with lean protein foods, such as fish, poultry, lean meats, low-fat or nonfat dairy products, beans, and small amounts of nuts and seeds, which provide healthy fats MEAL PERCENTAGE fats 35% proteins 15% carbohydrates 50% HOW CAN WE EAT? give ample time for eating , eat slowly , pause between bites , follow an eating schedule , eat meals of equal size , Avoid snacks of simple sugar & sweets. drink water any time , practice ways to refuse foods , Do not go hungry to occasions. BE AN INFORMED CONSUMER avoid binging NUTRITION AND EXERCISE A well-planned eating strategy will help support any training programme, whether you are training for fitness or for competition; promote efficient recovery between workouts; reduce the risk of illness or overtraining, and help you to achieve your best performance. NUTRITION BEFORE EXERCISE The main purpose of your pre-workout meal is to stabilize your blood sugar levels during exercise. For most regular exercisers, a daily diet providing carbohydrates of around 280–350 g for a 70 kg person. if you plan to workout for less than 2 hours, aim to eat around 1 g carbohydrate per kg of body weight (or 70 g for a 70 kg person) or 400–600 calories. For longer workouts or endurance events eat around 2 g carbohydrate per kg of body weight (or 600–800 calories). SUGGESTED PRE-EXERCISE FOODS Don‘t eat a big meal just before a workout otherwise you will feel uncomfortable, sluggish and heavy‘. Eating before exercise is something only the athlete can determine based upon experience, Guidelines include eating a solid meal 4 hours before exercise, a snack or a high carbohydrate energy drink 2 to 3 hours before exercise, And fluid replacement (sports drink) 1 hour before exercise. …CONT’D 1 hour or less before exercise: fruit or vegetable juice such as orange, tomato, or V-8, and/or fresh fruit such as apples, watermelon, peaches, grapes, or oranges and/or Energy gels up to 1 1/2 cups of a sports drink. Liquid meals often tolerated closer to exercise like; Ensure, Boost, Slim Fast Banana, 1 cup Mini Wheats or small turkey sandwich, 16 oz. sports drink …CONT’D 2 to 3 hours before exercise: fresh fruit or vegetable juices bread, bagels low-fat yogurt sports drink banana, 1 cup low-fat yogurt, 2 cups skim milk …CONT’D 3 to 4 hours before exercise: fresh fruit fruit or vegetable juices bread, bagels pasta with tomato sauce baked potatoes cereal with low-fat milk low-fat yogurt toast/bread with limited peanut butter, lean meat, or low-fat cheese 30 oz of a sports drink FLUID INTAKE NUTRITION DURING EXERCISE To stay hydrated during exercise, consume fluids at a rate that closely matches your sweat rate: Matching your sweat rate generally requires about 14–27 fl oz (400–800 ml) of fluid every hour of exercise, preferably in smaller amounts taken frequently. But fluid needs can vary considerably Calculate your sweat rate to determine your actual hydration needs To calculate your sweat rate, and for a personalized plan to meet your unique hydration needs, click on the PowerBar Sweat Rate Calculator at www.powerbar.com/src …CONT’D A sports drink is generally the best option when you’re training or competing. The advantages of a sports drink over plain water are many: Promotes better performance because it provides carbohydrates to fuel your muscles and your brain Athletes freely consume more fluids when their hydration beverage is flavored, as is the case with a sports drink Sodium and carbs cause the fluid in the sports drink to be absorbed more quickly The sodium also helps maintain your drive to continue drinking fluids when exercising, which is crucial to meeting your fluid needs Sodium also helps you retain the fluid that you’ve consumed …CONT’D Water is fine when exercising for less than 1 hour in moderate temperature conditions A sports drink is recommended for exercise of 1 hour or longer, and anytime conditions are hot or humid …CONT’D Refuel As Needed During Exercise Carbohydrate is the primary muscle fuel utilized during exercise, and stores are limited Carbohydrate refueling needs depend on the length and intensity of exercise For long-duration, all-out effort, refuel with sports nutrition products that provide a 2:1 blend of glucose and fructose to enhance energy delivery to muscles and help prepare you for high-endurance activities NUTRITION AFTER EXERCISE Promote Full Recovery: After Exercise Your body is ready to start the recovery process as soon as you finish your workout or competition, but you need to provide the necessary nutrients: Carbohydrates to restore depleted glycogen stores Protein to repair and build muscle tissue Fluids and sodium to rehydrate …CONT’D Carbohydrates To speed glycogen restoration after strenuous exercise: Consume 0.5 grams of carbs per lb (1.1 grams per kg) body weight within 30 minutes of finishing exercise For heavy training, repeat this hourly for the first 3 hours after exercise, or consume carb-based meals and snacks For a 150-lb (68-kg) athlete, that equates to 75 grams of carbohydrates right after exercise Simple carbs right after exercise are more effective at speeding glycogen restoration Repeat this within 2 hours after exercise, or consume a carb-based meal This is especially important if you are exercising again within 24 hours …CONT’D Protein Muscle tissue repair and building is critical to recovery: Muscle tissue is made up of These amino acids are then proteins, and proteins are absorbed and repackaged made up of building blocks into the proteins your body known as amino acids needs for the repair and building of muscle tissue When you consume foods, any protein present is digested and broken down into its component amino acids …CONT’D Athletes need more protein than inactive individuals, but most athletes get plenty of protein — and consuming more offers no extra muscle-building or performance benefits Total Daily Protein Needs 150-lb (68-kg) Athlete Resistance Exercise 0.55–0.77 g per lb body weight (1.2–1.7 g per kg) 82–116 g protein per day Endurance Exercise 0.55–0.73 g per lb body weight (1.2–1.6 g per kg) 82–109 g protein per day Teenage Athletes 0.68–0.91 g per lb body weight (1.5–2.0 g per kg) 102–136 g protein per day …CONT’D Sample daily intake for about 130 g protein per day 1 cup cereal, 1 cup milk PowerBar ProteinPlus® protein bar Sandwich, 2 oz turkey ½ cup baby carrots 1 cup low-fat milk 8 oz low-fat yogurt 4 oz chicken breast 1 cup brown rice 1 cup cooked broccoli PowerBar ProteinPlus® protein powder drink mix (1 serving) Total grams of protein Grams protein 11 24 20 1 8 8 28 6 2 20 128 grams CALORIE EXPENDITURE CALORIES IN FOOD CALORIES IN FOOD TIPS ABOUT FOODS …CONT’D …CONT’D BE AN INFORMED CONSUMER BUT, UNIT FIVE ASSESSMENT OF FITNESS COMPONENTS UNIT OBJECTIVE At the end of this unit you should be able to; Understand the importance of fitness assessment prior to physical exercise program Identify the different means to develop own physical fitness Develop skill to assess one‘s own physical fitness Interpret the results of fitness evaluation The results of fitness tests can be used to : Identify strengths and weaknesses in performance. Compare against recognised standards Monitor progress Adapt training programs Place athletes in correct training groups Set targets / goals Identify talent Monitor progress following injury ASSESSMENT OF CARDIORESPIRATORY FITNESS The most accurate means of measuring cardio respiratory fitness is the laboratory assessment of maximal oxygen consumption called VO2 max. VO2 max is a measure of the endurance capacity of both the cardio respiratory system and exercising skeletal muscles 1. The 1.5-Mile Run Test o The test is best conducted in moderate weather conditions (avoiding very hot or very cold days). For a reasonably physically fit individual, running or jogging can cover the 1.5-mile distance. For less fit individuals, the test becomes a run/walk test. …CONT’D 2. The 1-Mile Walk Test It is a weight-bearing test, however, so individuals with joint problems should not participate. The 1-mile walk test works on the same principle as the 1.5-mile run test. That is, individuals with high levels of Cardio respiratory fitness will complete a 1-mile walk in a shorter time than those who are less conditioned. …CONT’D Table 5.2 Fitness Classifications for 1-Mile Walk Test 3. The Cycle Ergo meter Fitness Test The test is conducted in gym condition Ride ( use) stationary bicycle (cycle ergo-meter) The test will be conducted in different intensity, time, repetition, rang and level of a person‟s performance Use the nomogram (Chart) to determine the level of VO2max and cardiovascular fitness rating. The Walking Test also can be used to assess the current level of cardiorespiratory endurance. 4. 12 minute run test: The test developed by Kenneth H. Cooper. The content of the test is to determine the distance in meter that you can run in a set time of 12 minutes over the flat course. Equipment: 1. Track or football field or flat course 2. A stopwatch or wrist watch 3. Roll meter to measure the field 1. Instruction: Warm up before taking a test (walking, easy jogging, stretching exercises) 2. Run a stable pace (as your performance) for the entire 12 minutes 3. Stop just after 12 minute run then determine the distance covered 4. Cool down after the test 5. Depending upon the age and sex locate the score and fitness rating TWELVE MINUTE RUN TEST RATING (FOR MEN) Fitness Value Very Poor Age in Year Less than 30 < 1600 30 – 39 < 1500 40 - 49 < 1300 50 and Above < 1200 Poor 1600 1500 1300 1200 Average Good Excellent 2000 2400 2800 1800 2200 2700 1600 2000 2500 1500 1900 2300 TWELVE MINUTE RUN TEST RATING (FOR WOMEN) Fitness Age in Year 50 and Above Less than 30 30 - 39 40 - 49 Value < 1000 < 1400 < 1300 < 1100 Very Poor 1000 1400 1300 1100 Poor 1300 1800 1600 1500 Average 1600 2100 2000 1900 Good 2100 2600 2400 2300 Excellent 5. The 3 - minute step test: Equipment: 1. A step bench or bleacher step that is 12 inches (30.5 cm) from ground level 2. A stopwatch or wrist watch Instruction: 1. 2. Warm up before taking a test (walking, easy jogging, and stretching exercises) Begin the test and continue to step at correct pace for 3 minutes. Each step has 4 beats: up-up-down-down. The rate of the stepping should be 24 steps per minute for male and 22 steps per minute for women. 3. Stop after 3 minutes. Immediately sit down on the bench and relax, don‟t talk 4. Five seconds after exercise, count the pulse for 60 second (better for 30 second ) 5. Cool down by walking slowly 6. Insert the result and read the rating chart STEP TEST RATING CHART Classification High Performance Zone Good Performance Zone Marginal Zone Low Zone Heart rate 84 and less 85 – 95 96 – 112 120 and above ASSESSING MUSCULAR STRENGTH As we discussed in unit 4, muscular strength is defined as the maximum amount of force you can produce during one contraction. Muscular strength not only is important for success in athletics, but also is useful for the average person in performing routine tasks at work or home. Strength can be measured by the one-repetition maximum (1 RM) test, which measures the maximum amount of weight that can be lifted one time. A. The push-up test The push-up test is an accurate assessment of upper body strength. The Cooper Institute develops the rating for this test with men performing push-ups (standard) and women performing modified pushups. Equipment: 1. Gymnastic mattress or towel (optional) …CONT’D Instruction: 1. Warm up before taking a test (walking, easy jogging, and stretching exercises) 2. Men start in the push-up position with the body supported by the hands and feet. The women start the modified push-ups with the body supported by the hands and knee. For both positions, the arms and the back should be straight and the fingerer pointed forward. 3. Lower the chest to the floor with the back straight, and then return to the starting position. 4. Perform as many push-ups as you can, without stopping or until reach the top number for the age group. 5. Insert the result and read the rating chart STANDARD/PUSH-UPS TEST RATING CHART (MEN) Age 18 – 29 30 – 39 40 – 49 50 – 59 60 and above Number of Push-ups Very Poor Poor Fair Good Excellent Superior Below 22 Below 17 Below 11 Below 9 Below 6 29 – 36 24 – 29 18 – 23 13 – 18 10 - 17 37 – 46 30 – 39 24 – 29 19 –24 18 – 22 47 – 61 40 – 51 30 – 39 25 – 38 23 – 27 Above 61 Above 51 Above 39 Above 38 Above 27 22 – 28 17 – 23 11 – 17 9 – 12 6-9 STANDARD/PUSH-UPS TEST RATING CHART (WOMEN) Age 18 – 29 30 – 39 40 – 49 50 – 59 60 and above Number of Push-ups Very Poor Poor Below 17 17 – 22 Below 11 11 – 18 Below 6 6 – 12 Below 6 6 – 11 Below 2 2-4 Fair 23 – 29 19 – 23 13 – 17 12 – 16 Good 30 – 33 24 – 30 18 – 23 17– 20 Excellent 36 – 44 31 – 38 24 – 32 21 – 27 5 - 11 12 – 14 13 – 19 Superior Above 44 Above 38 Above 32 Above 27 Above 19 B. The 90 seconds sit-ups test The 90 seconds sit-ups test is perform to assess the strength and endurance of the abdomen. Equipment: 1. Gymnastic mattress or comfortable surface 2. A stopwatch or wrist watch Partner Instruction: 1. Warm up before taking a test (walking, easy jogging, and stretching exercises) 2. Start by laying the back on the floor with the knees flexed so that the angle between the thighs and the calves is about 45 degrees. Cross the arms in front of chest and place the hands on the opposite shoulders. The partner should hold your feet to keep them in to contact with the floor. 3. Once your partner says “go”, perform as many sit-ups as you can for a maximum of 90 seconds or until you reach the top number for your age. 4. Insert the score and read the rating chart 90 SECONDS SIT-UPS TEST RATING CHART (MEN) Classification Excellent Average Poor Age in year 18 – 29 30 – 39 40 – 49 Above 50 51 and above 30 – 50 0 - 29 46 and above 22 – 45 0 - 21 41 and above 21 – 40 0 - 20 31 and above 15 – 30 0 - 14 90 SECONDS SIT-UPS TEST RATING CHART (WOMEN) Classification Agein year Excellent Average Poor 18 – 29 46 and above 25 – 45 0 - 24 Source: Fit and Well, 2005 30 – 39 41 and above 20 – 40 0 - 19 40 – 49 36 and above 16 – 35 0 - 15 Above 50 26 and above 11 – 25 0 - 10 Other muscular strength tests There are also other tests to assessing the current level of muscular strength in Gym conditions. Such as: 1RM The maximum leg press test The maximum bench press test Hand grip strength test ASSESSMENT OF FLEXIBILITY A. Sit-and-reach test It is the standard flexibility test that measures lower back and hamstring flexibility. Equipment: 1. Two pieces of wood about 30 cm (12 inch) high attached at right angle to each other 2. Attach a metric ruler to measure the extent of reach. With the low number of the ruler towards the person being tested, set the 26 cm mark of the ruler at the foot line of the box 3. Leveled or comfortable surface Instruction: 1. Warm up before taking a test (walking, easy jogging, and slow stretching exercises) 2. Reach your shoes and sit facing the flexibility measuring device with your knees fully extended and your feet flat against the device about 10 cm (4 inch) apart 3. Reach as far forward as you can, with palms down, arms evenly stretched, and knees fully extended; hold the position of maximum reach for about 2 seconds. 4. Perform the stretch 2 times, recording the distance of maximum reach to the nearest of 0.5 cm: ___centimeter. 5. Insert the score and read the flexibility rating chart RATINGS FOR SIT-AND-REACH TEST B. Range-of-motion assessments There are a few reliable tests to measure flexibility. However, it can be assessed the flexibility by measuring joint range of motion with goniometer, flexometer or other instruments. It can be used to measure the flexibility of most joints and the range of motion for dozens of movements such as: 1. Shoulder Abduction and Adduction 2. Shoulder Flexion and Extension 3. Trunk/Low Back Flexion 4. Hip Abduction 5. Hip Flexion (Bent Knee) 6. Hip Flexion (Straight Leg) 7. Ankle Dorsiflexion and Planter Flexion …WORLD RECORDS EXERCISE…