Dumbbell Concentration Curl is one of the biceps exercises I do.

哑铃集中柯尔是其中一个二头肌练习我。

youdao

Gravity takes over when you perform most exercises, like a dumbbell curl or a kettle bell swing, giving the body a chance to relax, says Rowdy Yates, a certified personal trainer and fitness manager at Crunch gym in New York City.

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