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hockeyguy9 hockeyguy9
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6 years ago
Most people are believed to have which of the following ratios of fast-twitch to slow-twitch muscle fibers?
 
  a. 60 to 40
  b. 50 to 50
  c. 20 to 80
  d. 40 to 60
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6 years ago
b
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