I am recently recovered from covid. 20 days passed after first symptoms with all reports negative. Only have some post covid weakness now. I check my heart beat in resting mode it is generally fine 60-80 and while sitting 75-90. But when I climb stairs it increases to around 145-150 while on walking it is around 125-130. Is it normal after covid due to weakness and all ? I had ecg and TMT just last month ( as a part of regular check up before covid TMT was normal even at heartbeat of 196 that time) and everything was normal.