As triathletes, we focus on a few of the body's systems—skeletal, muscular, cardiovascular, respiratory, and even digestive—but did you know the single biggest make-or-break system for triathletes could be the endocrine system?
Fatigue and heavy legs aren't the only sign of overtraining. These behavioral red flags can also signal something's up.
When you're still training hard, but not improving, it can be frustrating. It also can be a signal that you shouldn't ignore.
More than half of all runners will overdo it at least once in their running career.