Overtraining——What We Know Now?

Overtraining syndrome always directly affect health and physical performance of athletes, so it causes great concern from sports field both at home and abroad. The recent foreign literature indicates that there are a number of major theories regarding the reason of overtraining. That is the correct definition of overtraining; the imbalance hypothesis; the patterns of overtraining; autonomic imbalance hypothesis; glycogen deficit; branched chain anime acid hypothesis; immunological status; where to go from here?