Strengthen your shoulders
When your shoulders slump, so does your game. Poor posture is a sign of muscle imbalances that results in weakness and injuries (ruh roh!). According to Craig Levitz, M.D., Director of Sports Medicine at South Nassau Communities Hospital in Oceanside, N.Y., most female athletes (especially swimmers, volleyball, tennis, and softball players) have loose shoulders that put them at risk for rotator cuff injuries.
Protect yourself with external rotations using an exercise band: Affix a band ...
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