It's hard to believe plank could provide such a great workout until you try it.

Plank workout It's hard to believe plank could provide such a great workout until you try it.

The plank helps develop strength in the core, shoulders, arms, and glutes.
The longer you can hold the plank, the more resilient your lower back will be to injury, and the better your abs will look once you burn the fat off them.

Plank workout is reviewed in Appliv?
google play Plank workout itunes Plank workout


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