Because the body needs enough energy to achieve a certain exercise intensity during fitness, however, when the body is tired, it is easy to have insufficient energy. At this time, the training can not reach the intensity, the effect will be greatly reduced, and dizziness caused by hypoglycemia is prone to occur.
In addition, if the body is forced to do strength training under the condition of fatigue, muscle weakness and pain are more likely to occur, which will increase the risk of equipment falling on the body and cause unnecessary harm.
Therefore, when you are tired, you should stop exercising, rest in time, and supplement the nutrition needed for your body to recover.