用力动作 meaning in English

strength part

You need to * mentally * grit your teeth and strain with the action , i . e . , you have to put maximum mental effort into it , as if you were really climbing a rope , but without allowing your muscles to take part in it - this is all mental
你必须*在心中*咬紧牙关，用力动作，即：你必须以最大的心理力量这样做，仿佛你真的在爬一根绳子一样，但不要让你的肌肉参与? ?这都是心理的。