253【做仰臥起坐注意事項】
2019/11/15 09:37
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仰臥起坐時，全身都應用力，最好用器材補助，姿勢應以身體與地面平行，頭朝地面最好。
The notice for doing sit-ups.
When we do sit-ups, we should flex our muscles. Besides, we must do it with some equipment. The best way is to keep our body parallel with the ground and our head face to the ground.
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