imbalance

Body symmetry is important because poor balance of such things as muscle tightness, stretch, bone length, pelvic rotation, and scapular positioning increases risk of injury and can hurt performance. 

Ankle sprains are common in youth sports. Here's advice for parents on what should be done when your child suffers an ankle sprain, how to know when your child is ready to return to sports, and what he should do when he returns.