Hands on the floor..: ...legs outstretched, lower body down, push back up, repeat over and over. The part about "flattening lower chest", not so sure. Good luck!
Answered 11/22/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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