In Japan, teenage baseball players routinely pitch 700, 800, or 900 pitches over a few days. The lesson is in the doing to exhaustion, until your body has nothing left to teach you. It may also be why so many Japanese pitchers get hurt early in their careers, after coming to MLB. Or, it’s because they get soft in America and stop going past that point of failure. Either way.

http://m.espn.go.com/mlb/story?storyId=9452014&src=desktop