I haven't exercised for a long time, and I have physical problems. I can't bear this load for the time being. It is recommended to reduce the amount of exercise first to see if there are any discomfort symptoms. It may generally be anemia or weak heart function. ||||| Physical problems, anemia 99%. |||||||| Your amount is too large ~ ||||| Sometimes you haven't exercised for a long time, and your aerobic activity is too intense.