not sure if you are asking if overtraining-syndrome emerged around long-covid but that's not true as it has been documented for many decades in endurance athlet

not sure if you are asking if overtraining-syndrome emerged around long-covid but that's not true as it has been documented for many decades in endurance athletes but what I meant is the cause/effect and symptoms are virtually identical especially once afflicted long-covid has taken out a lot of athletes, especially triathletes, and many professionals who never recovered despite access to almost unlimited resources I actually collect articles about them and have hundreds in a folder but it gets depressing to check years later and they've never come back personally I lost about 10 vo2max points that never came back and it's not just respiratory performance, it's the entire energy envelope, the actual activity ability and recovery time is just completely destroyed also similar to auto-immune diseases but no existing test detects long-covid or overtraining-syndrome which is why I am so sure now it's "bad/corrupt code" in the mitochondria themselves