It is normal to feel tired during exercise. If you don't need to lose weight, you can completely supplement nutrition, but the food and methods supplemented in the process of supplementing nutrition are very important, and you can't eat it indiscriminately.

Because if you don't need to lose weight, you can eat whatever you want, but if you need to lose weight, I suggest you supplement some better food two hours before exercise, and dinner doesn't matter. Bread and the like are all good foods before exercise.

If we feel very tired during exercise, we can also eat something that can replenish energy, such as chocolate and carbohydrates, which can temporarily replenish our energy, but we should not eat too much, because if we eat too much, we must do more exercise.

You can also calculate your intake and exercise amount at ordinary times to make sure that your intake is lower than your exercise amount. If our intake is high enough to give exercise, even exercise will have no effect, so we must calculate this problem when eating.

Besides, I don't mind that we eat too much food after exercise. I can drink more water even if I don't mind eating food. If I can't help being hungry, I can drink more water. Drinking water also makes me feel full, or I'm afraid I can't replenish energy in time after exercise, because if we drink more than two hours, it will cause accumulation.

You can eat more nutritious foods before exercise, such as whole grains, bread, milk, etc., because you will consume a lot of calories later, so you should also add some nutrition. It is precisely because these foods have good nutritional value and are not easy to gain weight, so try to eat only chocolate bars or an apple when exercising, and it is best not to eat after exercise.