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Muscular Strength03

Muscular Strength03 - 7 Test administrators should be well...

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Unformatted text preview: 7. Test administrators should be well trained and have a thorough understanding of all testing procedures and protocols. D. Effect Of Various Factors On Strength 1. Muscle Cross Sectional Area - there is a strong positive relationship between muscle CSA and strength. Muscles increase in strength by increasing their size and by enhancing the recruitment and firing rates of their motor units. Hypertrophy - an increase in size of a cell such as a muscle fiber Hyperplasia - an increase in number of cells such as muscle fibers. Current research indicates that muscle fiber hypertrophy accounts for most, if not all, of the increase in muscle cross-sectional area due to an overload training program. There is evidence that muscle fiber hyperplasia occurs in animals, but there is presently no direct evidence that it occurs in humans. 2. Body Size - there is a positive correlation between body size or mass and absolute strength. There is a negative correlation between body mass and the strength/mass ratio. The strength to mass ratio directly reflects an athlete’s ability to accelerate his or her body. All else being equal, smaller athletes are stronger pound for pound than larger athletes. In comparing performances of Olympic weight-lifters in different weight categories, the most widely used formula is to divide the weight lifted by body weight to the 2/3 power. Large athletes dominate sport events which require a high level of absolute strength (e. g., throwing events in track and field) while smaller athletes dominate sport events which require a high strength/body mass ratio (e.g., gymnastics). ...
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