"Mysterious"
"Overtraining syndrome"
I don't see why it's so mysterious, fatigue accumulates until something tips you over the limit
Do we know the biological mechanism to cause OTS, though? That would open up avenues for treatment and more precise prevention besides "rest more" (not that that's a bad preventative).
What's fatigue? Is there a fatigue molecule?
Do we know the biological mechanism to cause OTS, though? That would open up avenues for treatment and more precise prevention besides "rest more" (not that that's a bad preventative).