In order to reduce fat, you need to consume your glycogen reserves first. When carrying out weight-bearing exercise, muscle sugar stored in muscles is used. If you just start aerobic exercise, you will consume muscle sugar in the first 20-30 minutes, and then fat, so when you do strength training after running, you will feel overwhelmed and even painful. When you do anaerobic strength training first, sugar is usually a natural substance. If you do strength training first, you can burn most of the glycogen stored in your body. Doing aerobic exercise after strength training will burn more fat!