health 4

health 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? Essential component of physical fitness and healthy living Strength- the ability of a muscle to generate maximum force against some heavy resistance II. How are strength and muscular endurance related? Muscular endurance- The ability to perform repetitive muscular contractions against some resistance for an extended period of time As endurance increases strength gain also occurs Endurance is a very important component of fitness as it is critical for everyday function. III. Type of Skeletal Muscle Contraction Isometric contractions- Muscle contraction that produces tension but does not result in a change of muscle length (for strength training w/ limited range of motion) Concentric contraction- Muscle shortening occurs while tension is developed to overcome a resistance. Eccentric contraction- Muscle contraction that involves a lengthening of the muscle o Ex: When doing curls, bicep is concentric, triceps are eccentric IV. Fast-twitch vs. Slow-twitch Fibers
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health 4 - Improving Muscular Strength, Endurance and Power...

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