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typeracer

Pit Stop

Record your races with a typeracer account:

Create Your Account
  • Save your race history and scores.
  • Customize your profile and racecar.
  • It’s free, why not?
有兩種纖維在我們的肌肉,紅色和白色。當一個運動員的長途列車運行,他或她構建更多的紅肌纖維比白肌纖維在他的小腿肌肉。阿短跑選手有更多的白色肌肉。如果你再培訓馬拉松運動員是一個短跑選手,大部分肌肉纖維將轉換為白色肌肉。
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