How long does it take to do plank exercises?

Diet

I know how to do it, but I don't know the time


  96 3   7 years ago

pu1. I'm doing 3 sets in 2 minutes


2018-02-02

pu2. It's hard to do it at first, so I can't do it for 2 minutes. Do it for about 30 seconds and slowly increase it


2018-02-02

pu3. Thank you!


2018-02-02


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