It is not recommended to exercise in a state of poor sleep or sleepiness. From the perspective of energy, you can understand the body as a battery. When there is less sleep, the energy of the body itself is insufficient. You have to run a 3D game (forced to go to the gym), which will accelerate the battery emptying. You may feel sleepy and unable to concentrate when practicing, but you must pay attention when exercising. At this time, the energy in your body will be stimulated, just like drinking red bull and coffee, which can really refresh you, but those things bring little energy to your body, just stimulating your body to use those extra energy (batteries), which is not good in the long run. You may have had this feeling, especially when you are playing competitive sports or fighting, and you feel endless strength, but once it is over, you will feel very tired, unable to move a step, or even hollowed out. Those are times when you are too excited, and you don't notice how your body feels at all, so be careful of things that can refresh you.