Aerobic exercise is any rhythmic and continuous activity that USES oxygen and large muscle masses of the body, such as the arms and legs.

有氧运动就是有节奏的、持续的活动。它需要耗氧并且锻炼像手臂和腿部的大块肌肉。

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Skeletal muscle converts chemical energy into motion and force, ranging from rapid and sudden bursts of intense activity to continuous low-intensity work, the researchers said.

骨骼肌把化学能量转化为动作和力量，从快的、爆发型的动作到慢的、持续型的低强度工作。

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Skeletal muscle converts chemical energy into motion and force, ranging from rapid and sudden bursts of intense activity to continuous low-intensity work, the researchers said.

骨骼肌把化学能量转化为动作和力量，从快的、爆发型的动作到慢的、持续型的低强度工作。

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