Because the centripetal force of Earth's rotation is stronger at the Equator.

因为地球自转的向在赤道处更强。

Is this the centripetal force in action?

这是运转时的向吗？

The other high tide you can think of is being caused by the Earth's centripetal force.

其它高潮你能够想象到是由地球的向起的。

And make sure you are indeed training to concentric failure.

还要确你是在进行向失败的训。

Now there is a more scientific term known as concentric failure, where you fail to complete the concentric, muscle-shortening phase of a rep without significant compromises to your form or technique.

现在有一个更科学的术语叫做向失败，指的是你不能在没有对形式或技术做出重大妥协的情况下完成一个向的、肌肉收缩阶段的训。

So there was a meta-analysis recently where they looked at either concentric repetition of more than two seconds or less than two seconds and saw strength outcomes were better.

因此，最近进行了一项荟萃分析，他们研究了超过两秒或少于两秒的向重复，结果发现量结果更好。

A 2016 study showed that subjects with multiple years of training experience who believed they were pushing to their max, end up making less gains than subjects that were directly instructed to push to concentric failure.

2016 年的一项研究表明，有多年训经验的受试者认为自己已经达到了极限，但最终取得的效果比直接指导进行向失败训的受试者要少。