8 th grade health unit muscles and exercise

8th grade health unitMuscles 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)•

•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? This is a muscular problem that can have lasting effects. It is caused by small tear to a muscle or tendon.

• What are two healthy behaviors that can prevent muscular system problems? Maintaining muscle tension by using the muscles, and by wearing protective gear while engaging in 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.

Deltoid

Biceps Rectus abdominus

SartoriusQuadriceps

Sternomastoid

Masseter

Pectoral

Tibialis

Deltiod

Triceps Latissimus dorsi

Gluteus maximus

Gastrocnemius

Achilles tendon

Trapizus

Hamstring

Full-Body Workout Example

• 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 Curls- Bicep Exercise

Dumbbell behind the head Press- triceps exercise

Hanging Leg Raise – Ab exercise

Examples of Chest and Back Exercises

• Chest • Bench press• Incline bench press• Decline bench press• Dips• Cable crossovers• Push-ups• Flys

• Back• Lat pull down• Bent-over rows• Dumbbell rows• Pull-ups• Back extensions• Row Machine• Inverted Pull-up

Triceps and Bicep examples

• Tricep• Kickbacks• Dips• Rope pull downs• Skull crushers • Behind the head press• Close-grip bench• Push-ups

• Bicep• Pull-ups• Curls• Incline curls• Concentration curls• Hammer curls• Straight bar curl• Seated bar curl

Leg and Shoulder exercise examples

• 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• Crunches • Sit-ups • Planks • Russian Twists• Seated Floor Touches • Windshield Wipers• Hanging leg raise • Bicycles • Partner leg throws • Decline sit-ups• Side planks

1. Table of Contents/Nutrition Journal2. Nutrition Notes3. Journal-Muscles4. Worksheet 19/205. Worksheet 21/226. Muscle i.d.

Notebook Pages