If you are doing aerobic exercise, your body will consume glycogen first. After glycogen consumption, you will start to decompose fat consumption. Although everyone's glycogen is different, generally speaking, it takes about 20 minutes, that is to say, the time for an aerobic exercise should not be less than 20 minutes, and the best time for burning a certain amount of fat is 40-60 minutes.
High-intensity strength training can empty glycogen in the body. After glycogen is emptied, the body will be forced to consume fat as an energy supplement. Moreover, the afterburning effect of high-intensity interval training is better than aerobic exercise, which can make people continue to consume fat even after exercise training. Because high-intensity training is generally in a short time, you can do several groups of movements, and the general time is about 20 minutes, not more than 40 minutes. So don't exercise blindly for the satisfaction of a data, but exercise reasonably in a way that suits you.