Lesson 4 - Improving Muscular Strength Endurance and Power...

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Improving Muscular Strength, Endurance and Power Lifetime Fitness Lesson 4, Chapter 5 I. Why is muscular strength important for everyone? A. Essential component of physical fitness B. Strength training II. How are strength and muscular endurance related? A. Strength i) Generate max force B. Muscular Endurance i) Repetitive muscular contractions III. Type of Skeletal Muscle Contraction A. Isometric Contraction i) Produces tension ii) No change in muscle length B. Concentric Contraction i) Shortening of muscle C. Eccentric Contraction i) Lengthening of muscle IV. Fast-twitch vs. Slow-twitch Fibers A. Fast twitch i) Powerful movement ii) Anaerobic B. Slow twitch i) Fatigue resistant ii) Aerobic iii) Posture muscles C. Fiber types can be modified V. What determines how much strength you have? A. Fiber Size i) Strength – number and diameter of muscle fibers B. Biomechanical Factors i) Levers and pulleys generate force C. Age i) After 25, max strength declines 1% each year D. Sex i) Training guidelines should be the same E.
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