挑战身体。

Challenge yourself physically.

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稳踏椅的运动形式是身体上下运动，挑战身体的平衡和力量。

Stability chair's movement form is the bodily vertical motion steadily, challenges body's balanced and the strength.

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在境况最好的时候，重新开始锻炼身体也可能是一项挑战，但如今许多人都无法去健身房或参加面授的健身课程，就更是连从何处入手都很难知道。

Getting back into exercise can be a challenge in the best of times, but with gyms and in-person exercise classes off-limits to many people these days, it can be tricky to know where to start.

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