Sea
I love bicycle crunches, it's one of my favorite exercises.
我建议做这两个动作时都交叉双腿。做普通卷腹时，将手肘贴近膝盖。做自行车卷腹时，将左手肘贴近右膝盖，右手肘贴近左膝盖。
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评论 2
- Jim Wattier
Good for those abdominal muscles!