游泳收腹与吸肚子的区别！
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| MP4 | N/A | 480P | Download |
| MP4 | N/A | 360P | Download |
| AUDIO | |||
| MP4 | N/A | mp4a.40.2 | Download |
| MP4 | N/A | mp4a.40.5 | Download |
| MP4 | N/A | mp4a.40.2 | Download |
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游泳中收腹可以让腰背部处于直立状态，并且很好的连接上下半身不影响呼吸！而吸肚子只是单纯的把肚子往内吸进去，还影响呼吸！
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