8th grade health unit
Muscles and Exercise
Pick up 4 worksheets and answer
the Journal questions
List as many muscles as you can
and where they are located.
How many muscles do you think
are in the body?
Muscular System Notes
• The body is composed of over 600 muscles
• Muscular System-group of structures that give your
body parts the power to move
•3 Kinds of Muscle:
•A.Skeletal-attached to bones that enable you to
move (voluntary)
•B.Smooth- the muscles found in the
organs, blood vessels, and glands
(involuntary)
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•C.Cardiac- found only in the walls of the
heart (involuntary)
How muscles Work
• Two basic
actions
account for
all muscle
movement.
• Extension- the
lengthening of
muscle fibers
• Contraction- is
the shortening
of muscle fibers.
Fast and slow twitch muscle fibers
• Fast Twitch- Because
fast twitch fibers use
anaerobic metabolism
to create fuel, they are
much better at
generating short bursts
of strength or speed
than slow muscles.
However, they fatigue
more quickly.
• Slow Twitch- The slow
muscles are more
efficient at using oxygen
to generate more fuel
(known as ATP) for
continuous, extended
muscle contractions
over a long time
Your Muscular System
• What is a muscle strain? • What are two healthy
behaviors that can
This is a muscular
prevent muscular
problem that can
system problems?
have lasting
Maintaining muscle
tension by using the
effects. It is
muscles, and by
caused by small
wearing protective gear
tear to a muscle or
while engaging in
tendon.
sports.
Your Muscles at Work
• Regular physical •
activity keeps
muscles
healthy,including
the heart
Muscular Dystrophy
is a serious muscular
problem in which
skeletal muscle
tissue gradually
wastes away.
Eventually people
with this can no
longer stand or walk.
Masseter
Sternomastoid
Pectoral
Deltoid
Biceps
Quadriceps
Rectus
abdominus
Sartorius
Tibialis
Deltiod
Triceps
Trapizus
Latissimus dorsi
Gluteus
maximus
Hamstring
Gastrocnemius
Achilles tendon
Full-Body Workout Example
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Chest- Bench Press
Back- Lat Pull- Down
Shoulders- Barbell Press
Legs- Squats
Biceps- Curls
Triceps- Dumbbell overhead extension
Abs- Hanging leg raise
kids health video-muscle
Bench Press – Chest Exercise
Lat Pull Downs- back exercise
Squats- Leg exercise
Seated Dumbbell Shoulder Press
Standing Dumbbell CurlsBicep Exercise
Dumbbell behind the head Presstriceps exercise
Hanging Leg Raise – Ab exercise
Examples of Chest and Back Exercises
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Chest
Bench press
Incline bench press
Decline bench press
Dips
Cable crossovers
Push-ups
Flys
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Back
Lat pull down
Bent-over rows
Dumbbell rows
Pull-ups
Back extensions
Row Machine
Inverted Pull-up
Triceps and Bicep examples
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Tricep
Kickbacks
Dips
Rope pull downs
Skull crushers
Behind the head press
Close-grip bench
Push-ups
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Bicep
Pull-ups
Curls
Incline curls
Concentration curls
Hammer curls
Straight bar curl
Seated bar curl
Leg and Shoulder exercise examples
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Legs
Squats
Leg curls
Leg extensions
Box Jumps
Front Squat
Lunges
Leg Press
• Shoulders
• Over head press with
bar or dumbbell
• Reverse flies
• Shrugs
• Front Raises
• Lateral Raises
• Upright Rows
Abdominal Exercises
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Crunches
Sit-ups
Planks
Russian Twists
Seated Floor Touches
Windshield Wipers
Hanging leg raise
Bicycles
Partner leg throws
Decline sit-ups
Side planks
Notebook Pages
1. Table of Contents/Nutrition Journal
2. Nutrition Notes
3. Journal-Muscles
4. Worksheet 19/20
5. Worksheet 21/22
6. Muscle i.d.