数有年轮,人体同样有年龄,那么计算自己身体的年龄的方法你知道吗？
4
Do as many modified pushups (on your knees) as you can without
stopping, keeping your body in a straight line and lowering your chest within four inches of the floor.
If 0-30 add 2 years. If 31-60 add 1 years. If 61-90 subtract 1 years. If 91+ subtract 2 years.
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