143energy20 - most voluntary activities - slow recruited...

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20 Muscle Fiber Types • Fiber types are classified by – differences due to different isoforms of myosin (types) - twitch characteristics – also distinguished by functional and metabolic characteristics • Table slow vs. Fast twitch(a,b) - Slide 20 • motor unit - collection of fibers that contract together – all fibers in motor unit are same type
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Unformatted text preview: most voluntary activities - slow recruited first (small motor units) as more power is needed - recruit fast twitch (larger motor units) variability in fiber type distribution, muscles are mixture, genetics % Slow twitch vs. sport (slide 21)...
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This note was uploaded on 12/27/2011 for the course KIN 143 taught by Professor Asmundson during the Fall '09 term at Simon Fraser.

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