The first one is highly recommended. Running and skipping rope are all good. I ran 56 laps in high school and jumped 1 hour on the ground. As long as you persist, you will have an immediate effect in a week.

Running first insists on 4x400m, and then gradually increases, not for speed, but for task completion. Jump without rope, listen to music, jump if you want, start to rest for 5 minutes and 2 minutes, three groups at a time, and then increase your physical strength 15 minutes.

When I was in primary school, my legs were straight, but then I didn't practice, and my bones were stiff. One-leg training is good for increasing your flexibility, but it has little effect on losing weight.

You can't sit down and massage your calves after running, which is easy to cramp. You must stand and walk slowly to relax your muscles.

I hope it helps you.

The following is my renderings two years ago.