这个快速的上半身锻炼旨在拉长和强化你的瘦臂和背部肌肉。我喜欢通过交替进行更重的力量训练和使用轻重量高重复次数的训练来混合我的锻炼计划，以增强瘦肌肉和定义。
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| VIDEOS | |||
| MP4 | N/A | 480P | Download |
| MP4 | N/A | 480P | Download |
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| MP4 | N/A | 360P | Download |
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| MP4 | N/A | mp4a.40.5 | Download |
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| MP4 | N/A | mp4a.40.5 | Download |
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