The right to clench fist and stretched to shoulder height, use left hand holding the right arm below the dewlap.

右手握拳并向外伸展至肩膀的高度，用左手握着右手臂下方的赘肉。

youdao

When work not favour, can relax the wrist and arm muscles, such as natural clench fist, and then slowly loosen, repeatedly, loosen the hand joint;

在工作不忙的时候，可以自行放松腕部及上肢肌肉，如自然握拳，然后缓慢松开，反复多次，放松手部关节；

youdao

The next time you're faced with a choice that takes self-control, clench your fist or firm that bicep.

下次当你面临需要自我控制的选择时，握紧你的拳头或收紧你的二头肌。

youdao

By contrast, people who are defensive or angry may protectively fold their arms across their chest, clench their hands into a fist or tightly grip their arm or wrist.

FORBES: Body Language Savvy for Sales

Both techniques were able to see the brain acting to clench a volunteer's fist in his dream in exactly the way that it does when ordering fist-clenching in reality.

ECONOMIST: Reading the brain

This action was to clench either their right or their left hand into a fist.

ECONOMIST: Reading the brain