You have kind of two key parameters you're trying to optimize: how fast you're moving forward but also how fast you're moving down.

如果你想要进行优化，就有两个关键参数：你前进的速度和你下降的速度。

But, a good portion of the muscle and strength talks routinely focuses around a few key parameters, one of which is a thing called repetitions.

但是，关于肌肉和力量的锻炼建议很大一部分集中在几个关键参数上，其中之一就是所谓的重复次数。