Scar tissue from chronic sprains and strains can reduce strength and mobility and prevent athletes from performing at their best. Summer break is the perfect time to get those nagging sports injuries looked at. Rehabbing injuries such as a pulled hamstring from soccer, an achy knee from dance, or a sore shoulder from repetitive throwing is most effective when combined with adequate time off. Before returning to sports, make sure that explosive movements such as sprints, jumps, and cuts can be done without sharp pain. It is also a good idea to integrate a few dynamic stretches into your warm-up.