Presentation on theme: "8 th 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."— Presentation transcript:
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. anaerobic 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.
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