"... You do not necessarily have to divide your exercise time into daily allotments, either. Existing “scientific evidence does not allow researchers to say, fo

"... You do not necessarily have to divide your exercise time into daily allotments, either. Existing “scientific evidence does not allow researchers to say, for example, whether the health benefits of 30 minutes on five days a week are any different from the health benefits of 50 minutes on three days a week,” according to the activity guidelines. Do what suits your schedule. ..." Minimum for mental health, not physical health and doesn't take into account is the way people work very well. If you do lots of little bits of "regular" exercise it adds up. Leave a time interval and it "appears" to get harder to do the next time. I found this last year trying to see exactly why it's easy to fail doing hard things. By breaking the hard thing into little irregular steps and repeat them at fixed regular intervals there is less chance of failure. The fail point is right around the time you start to do a hard task after an idle period. Take a break and things appear harder than they are. The amount of motivation energy is high. Do things regularly and the energy barrier seems lower. I found this out the hard way trying to see how far I could push myself without cracking or failing. My target last year was 1000 miles.