I was searching for data on atrophy when I found an article on fatigue. One section, in particular, got my attention: “Fatigue has been an under-recognized aspect of neuromuscular disorders over a long period of time. As we have mentioned before, fatigue on one hand is caused by a local effect on muscle function (peripheral fatigue), and on the other hand fatigue originates at the level of the CNS because of feedback about the pathological state of the PNS. This fatigue protects the muscles from further damage by down-regulating physical activities.”
Look carefully at the last sentence. What it seems to be saying is your own Central Nervous System (CNS) recognizes something is wrong and ‘down-regulates.’ Meaning what? Your body gives you fatigue to slow your activity presumably as a self-protective action.
“We” have often said on this board- ‘Do not overdue it, it’s as bad, or worse, than doing nothing.’ This may help explain why.
Read all about it: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2824125/