With the number of fat overweight kids. Along with the normal weight kids who are not in game fitness shape. I don’t think you worry to much about over use injury as much as out of shape injury. Most if not all travel players should probably be doing more than they already are during the summer.

Players will have a hard time playing in pre-season tournaments (late August or early September) in the hot/humid weather if they don’t practice at all in during the hot/humid summer.