Seems it might not be common knowledge that if you have covid, you *mustn't* push yourself to build your activity levels back to normal. There's a high likelihood that Long Covid is a type of ME/CFS, a disabling chronic illness which often follows a viral infection. Everyone with ME will tell you: do not push yourself! At that delicate phase of recovery you could seriously risk becoming permanently disabled. Rest as much as possible, and err on the safe side!