在 App Store 中下载


描述

Perform crunches at a swift and steady beat with proper form.



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在 App Store 中下载   从 Google Play 下载 Workout Trainer。

步骤
Lie on your back with your knees bent and your hands behind neck. Inhale.

1. Lie on your back with your knees bent and your hands behind neck. Inhale.

Exhale and you curl your back to lift your shoulders towards the ceiling. Lower to the ground and repeat.

2. Exhale and you curl your back to lift your shoulders towards the ceiling. Lower to the ground and repeat.



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