But the reason why you have no effect is because you can't persist. By persistence, I mean running in place for 40 minutes without stopping, but soaking for a while can't achieve the exercise effect. Remember, the essence of exercise is to reach your limit, so your muscles will split and recombine, and your strength will increase, but your muscles will hurt in a few days.

Ever heard of muscle tear training? That's what it means.

If you insist on running for 40 minutes, it is better than running in the playground.

But you can't stop, otherwise it's useless.

Satisfied, please adopt.