Overtraining syndrome (fatigue, poor sleep, performance decline)

1. Origin of Overtraining Syndrome
Overtraining syndrome is not caused by a single event, but by long‑term training volume or intensity exceeding the body’s recovery capacity. When mileage remains high, intense workouts are too frequent, recovery and sleep are insufficient, or psychological stress accumulates, the body’s repair system cannot keep up. This gradually leads to a state of “training more but feeling more fatigued.” In short, output keeps increasing while recovery is inadequate, and the system falls out of balance.

2. Warning Signs: How Does It Present?

• Persistent fatigue and lack of energy despite training

• Poor sleep quality, waking easily or never feeling rested

• Decline in performance: slower pace, higher heart rate

• Irritability, reduced focus, loss of enthusiasm for running These symptoms usually persist and worsen over time, not just for a day or two.

3. Prevention Before Exercise Key points: Allow recovery, Monitor condition, Periodize training.

• Plan recovery days and easy weeks: Don’t push peak training every week; schedule regular down weeks to recharge.

• Monitor body feedback: Track resting heart rate, sleep quality, and perceived fatigue; reduce load if abnormalities appear.

• Consider life stress: Work pressure and poor sleep also count as “load,” not just mileage.

Summary: Overtraining isn’t about lack of effort—it’s about too much effort without recovery. Those who keep improving are usually the ones who rest best.