Joint forces, however, increased significantly with each competitive level. This led researchers to conclude that the high speed of adult pitching is due to increased muscle strength rather than body mechanics. The chief investigator says the findings support a common coaching philosophy. It also suggests that a lighter ball might allow kids to pitch at the speed of adults. Fleisig tells WebMD that increased joint force may predispose adults to injury, and sports medicine experts agree.
Overuse injuries are microtears of muscles, tendons, or ligaments.
And in younger athletes, they can involve bone. Chang tells WebMD that overuse injuries result from increased intensity and frequency, inadequate warm-up, or improper body mechanics. One of the best ways to prevent overuse injuries is to improve overall fitness. It's also important to focus on strengthening and flexibility throughout the year. For pitchers, that means the shoulder, elbow, and wrist.