AskJR answered Friday May 18 2007, 9:01 am: Running everyday burns off calories. It will then burn off fat. Once excess fat is burned, it starts to burn muscle in the legs. Burning the muscle builds up the muscle. So your legs will become more defined and muscular.
Look at runner's and dancer's legs.
Arms should be bent at the elbow, hands in fist in front of you and rotated in a swing action as you walk or run, which will exercise arms but not build them up as noticeably as legs.
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