Have you ever watched some people do the plank? Their back is sagging like a saddle or their butts piked in the air. Ouch. Here’s how to do a basic plank AND a few variations.
Nathan VIenneau
Personal Fitness Instruction Inc.
Personal Fitness Instruction Inc.
Have you ever watched some people do the plank? Their back is sagging like a saddle or their butts piked in the air. Ouch. Here’s how to do a basic plank AND a few variations.
Nathan VIenneau
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