Not bad, but I haven't learned much about treadmills. You belong to variable speed running, which is actually not bad. Now I see that there are recommendations, such as running for 5 minutes in the sixth gear-10 gear (this belongs to full-speed running, which may be a little tired after running) for a few minutes (depending on your ability)-5 minutes in the sixth gear, similar to this cycle. But if the meat is loose, I actually suggest you do strength training, or Weibo can watch some videos of mikelingfitness, and some can do it at home. Don't be afraid of crowding. I personally admire him.