A member asked:

On my workout dvds the instructor always says pull in or tighten my abs. how do i do that and does it really make a difference when i'm exercising?

A doctor has provided 1 answer

Similar to...: ...Straining with a sit-up, or with a bowel movement. Abdominal muscles are an essential core muscle system, and need to be exercised along with other muscles.

Answered 8/29/2013

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Boobs feel tight because of workout, is this normal?

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