These training increases have come with a price tag. Overtraining, defined by the USOC in 1998 as “the syndrome that results when an excessive, usually physical, overload on an athlete occurs without adequate rest, resulting in decreased performance and the inability to train,” is on the rise. Differences in how overtraining is defined has made a true estimation difficult, but researchers suggest that on average, ten percent of athletes are overtrained at any given time. Endurance sport athletes are usually more hard hit—sixty percent of competitive runners are or have been overtrained, by some estimates (Morgan et al., 1988). Overtraining has permeated the highest levels of sport, with twenty-eight percent of 1996 summer Olympians and ten percent of 1998 winter Olympians reported overtraining as a significant reason for their competitive difficulties (Gould et al., 2001). More disturbing, however, is the increasing prevalence of overtraining at sports’ developmental levels. The price athlete’s pay for overtraining can be a high one. While most athletes who become stale or overtrained miss only a few days of training, for others, the symptoms can last much longer. This outcome is particularly true for the athlete who continues to try to train through his or her early symptoms, ignoring the warning signs. Given the increasing likelihood that your athletes are going to experience overtraining during the course of their careers, what can you do as coach to mitigate or even prevent this from happening? Step 1: Know the Symptoms of Overtraining While the sport scientists are still working to determine the exact mechanisms of overtraining, research and anecdotal reporting have combined to produce a list of overtraining symptoms to watch out for in your athletes: