他们猛击树干来锻炼双手，练习蹲坐，让其他同学坐在他们的肩膀上锻炼腿部力量。

They jab tree trunks to toughen their hands and practice squatting with other students sitting on their shoulders to build the leg strength.

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这个练习在整个程序中加强你的手臂，核心肌肉和腿部肌肉力量。

Doing this exercise strengthens your arm, core, and leg muscles throughout the routine.

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我们祈求她现在的状态不会更糟，并祈求定期的练习能增强她腿部的力量，使她的生活恢复正常。

We kept our fingers crossed that this would be the worst of it, and that with regular exercise to strengthen her legs, she would return to normal.

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