Grip the rope as tightly as you can.

尽可能紧紧抓住绳子。

《牛津词典》

No one can really pull you up very high - you lose your grip on the rope. But on your own two feet you can climb mountains.

没有人能真正把你拉得很高——你会抓不牢绳索。可是，你凭自己的双脚却可以翻山越岭。

youdao

Grip strength, range of active elbow extension, and speed of rope climbing returned to baseline values at postoperative Days 4, 8, and 8, respectively.

与术后4,8,8天分别可以观察到握力、肘关节主动伸展、爬绳速度的恢复。

youdao

It has a simple-to-move foot bar that lifts and clicks into place to reduce transition time between exercises, patent-pending collars on the springs to make them easier to grip when changing settings and a rope system that lets you adjust length with the pull of a lever.

WSJ: An Exercise in Good Taste: Refined Fitness Equipment