A distinction needs to be made based on goals: are you exercising for general wellness, or are you training for a goal? I'm not saying one should injure themsel

A distinction needs to be made based on goals: are you exercising for general wellness, or are you training for a goal? I'm not saying one should injure themselves when training, that's counterproductive. But exercising for general wellness shouldn't be intense. Do something to gently, mildly raise your heart rate for 30 minutes, three times a week. That's a baseline. Try to extend that to an hour a day, but don't up the intensity. That's about optimal for overall health.