大多数运动员所犯的最大错误是在该放松的日子操练的太辛苦，因此当高强度训练的日子来临时，他们又无法达到所要求的强度。
The biggest mistake of most athletes is to make the easy days too hard, so when it comes time for a hard training day, they can't go hard enough.
如果一个运动员主要是训练速度的，那些介于二者之间的肌肉纤维将像高强度肌肉纤维一样动作，而进行耐力训练将使它们的动作更像低强度肌肉纤维。
If an athlete trains mainly for speed, those muscle fibers in the middle will act as if they are high-intensity ones, but endurance training will make them behave more like the low-intensity fibers.
本实验以SD大鼠（含）为实验对象，递增强度跑台训练建立大强度耐力运动模型。
This studies' objects are SD rats( ). The exercise models were set up by progressing intensity endurance training.
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