If you do aerobic exercise before strength training, you won't have enough energy to finish strength training. Doing aerobic exercise first will consume a lot of glycogen, but when you really want to do weight-bearing exercise, it will be more difficult to train again, and there is not enough energy for you to support. It will make you very tired and unable to play your due state, so the intensity of the final training will be lower than usual, and the stimulation to muscles will be reduced.

If you want to lose fat, the previous anaerobic exercise has consumed most of the glycogen, and then aerobic exercise will consume fat more easily.

So if we do aerobic exercise from the beginning, we will consume muscle sugar in the first 20-30 minutes (of course, we will consume fat afterwards). When you are doing strength training, you are usually using glycogen as a natural material. 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!

Because you are reducing fat, it is better to be anaerobic before aerobic.