What about stretching and flexibility?

Stretching is also believed to help to prevent injury to tendons, ligaments and muscles by improving muscular elasticity and reducing the stretch reflex in greater ranges of motion that might cause injury to tissue. For example, some research still in the preliminary stages has found soccer players reduced injury risks by stretching, however the number of players studied was not large enough to draw a firm conclusion. For sports such as tennis, where one of the long-term goals of stretching is to gradually increase static range of motion, the cool-down is an ideal time to systematically program a long-term increase in static flexibility.