Overtraining is a syndrome. Symptoms are decreased heart rate variability [1]Detailed heart rate variability analysis in athletes, an elevated resting heart rate, and an inability to reach maximum pulse rate in anaerobic training. It is also associated with fatigue, in the context of continuous high intensity exercise. It can be serious and can have long… Continue reading HRV and overtraining
Sounds like science fiction. It's science, not fiction.