"Conventional wisdom among coaches and managers is that restricting innings for young starting pitchers, and slowly increasing the number of innings pitched over several years, gives pitchers' tissues sufficient time to adapt to the workload of a major league season," said Thomas Karakolis, lead investigator on the study. "But all our data shows that these strategies really make no difference in preventing injury." '"Injury is the result of workload exceeding the capacity of the body's tissues, so while counting innings is a tempting way to measure workload, it's actually a very flawed method," said Karakolis. "If coaches are looking for ways to prevent injury, simply limiting the number of innings is not the answer. They have to look at how hard a pitcher's body is working during each inning, each pitch." http://www.sciencedaily.com/releases/2015/04/150406121354.htm