Paralympic athletes who train too much without enough rest or fuel might be more likely to get stress injuries in their bones, especially if they do endurance sports like racing or long-distance events.

When athletes or soldiers train too much, their bodies can go into overtraining mode, which causes hidden inflammation that weakens the immune system, makes muscles shrink, messes with blood sugar, and makes them more likely to get sick.

Overtraining isn't just being tired — it's when an athlete's body stops working properly and performance drops for a long time, even after resting, and it's different from regular burnout that goes away in a few weeks.

Overtraining in athletes might actually show up as low energy from sports, meaning that 'low energy' could just be one way overtraining looks, not a totally different problem.

If athletes push themselves too hard for too long without enough rest, they can develop a serious condition called overtraining syndrome, where their performance gets worse and just won't improve — even after taking time off.

Athletes who are really overtrained might feel more depressed or moody than those who are just temporarily worn out, and these mood changes could be an early red flag that something's wrong.