"Many people think you build [muscle] in the gym, but you actually build when you sleep, " Chirjeev Sawhney, a personal trainer and fitness manager at a Gold's Gym in Arlington, told the Post.

Chirjeev v Sawhney是Arlington地区黄金健身房的私人教练和管理者，他告诉邮报说到：“许多人认为锻炼才可以塑造肌肉，实际上我们都是在睡眠中塑造的。

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"He has the muscle mass of someone under age 40, " says Greenberg's trainer, Fredrick Hahn, who owns the gym.

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