Learning Outcomes ALL – List the 3 different types of muscle - Demonstrate the separate categories that relate to specific movements - Show your understanding of the 2 different types of muscular contraction SOME – Apply your knowledge of muscles & movement into a table without using the book Muscle Test Deltoid Biceps Trapezius Gluteals Hamstrings Latissimus dorsi Abdominals Gastrocnemius Triceps Quadriceps Pectorals Intercostal muscles 3 types of muscle Skeletal/ voluntary Cardiac Involuntary You are now the teacher… In 3’s divide up the 3 types of muscle and you need to each: • Explain their role within the body • Give an example of where one is in the body How well was you taught?? 1. They work constantly 2. They make up the majority of muscles in the body 3. They are under our conscious control 4. They are found in the walls of the heart 5. These are muscles you cannot control 6. Are found in the walls of the intestines & blood vessels 7. They are also known as skeletal Answers 1. 2. 3. 4. 5. 6. 7. Cardiac & involuntary Skeletal/voluntary Voluntary Cardiac Cardiac & Involuntary Involuntary Voluntary Separate categories relating to specific movements FLEXORS muscles that bend the limb at a joint by contracting ADDUCTORS the muscles that move a limb towards the body EXTENSORS work against the flexors & straighten a limb by contracting ABDUCTORS move a limb away from the body When muscles contract they do so in two ways: Isotonic contractions occur when movement is created. Concentric – This is when the muscle shortens Eccentric – When the muscle gradually lengthens and returns to normal length and shape Fast-paced games require isotonic contractions. 8 of 33 © Boardworks Ltd 2006 Isometric contractions Isometric contractions do not create movement – they are working to keep the joint stable. The muscle neither shortens nor lengthens. This type of contraction occurs in several situations: © EMPICS Ltd To support a weight in a stationary position. To hold the body in a particular position (e.g., in gymnastics). Isometric contractions occur in a rugby scrum 9 of 33 © Boardworks Ltd 2006 MUSCLES WORK IN PAIRS OR GROUPS – THEY PULL BUT NEVER PUSH Using this fact try & fill in the table relating to muscles & their movement – without the book first 10 of 33 © Boardworks Ltd 2006 Muscle Pair/Group Movement they allow Sporting Example Biceps & Triceps Kicking a football Abdominals Allow arm to be raised at the shoulders Flexing the foot at the ankle Take off phase of any type of joint jump Muscle Pair/Group Biceps & Triceps Hamstrings & Quadriceps Abdominals & Latissimus Dorsi Pectorals & Deltoids Gastrocnemius / muscle in front of the leg (don’t need to know name) Movement they allow Flexion & extension at the elbow Flexion & extension at the knee Movement around stomach & waist (bending/twisting) they also help keep body upright & straight Adduction & Abduction of the arms Sporting Example Throwing Movement such as javelin or a ball or a smash in volleyball Kicking a football and running movements Used in specific exercises such as sit-ups. Also to keep body straight in movement Shot Putt, Swimming strokes, Tennis drive Flexing & extending the foot Take off phase of any type of at the ankle joint jump Homework • Revise the muscle pairs/groups and find 2 pictures of sporting examples that show the movement involved & describe the movement taking place using KEY TERMS Email these pictures to Mrs Gregory before next lesson