Because the main "food" of human immune system is glutamine, the body will be under great pressure because of high-intensity fitness training. If you continue to train, your body will consume glutamine at the same time. A natural reaction to increasing the intensity of training is to find that you are more likely to get sick. This requires us to supplement glutamine, such as taking vitamin C, ginseng and echinacea.

Immunosuppression will occur within 24 hours after exercise. During this period, immune cells began to "strike", rest and recuperate. When a cold virus invades the body, the immune system must fight it. Without immune cells, cold germs naturally flourish.

High-intensity training will interfere with the immune system and increase the levels of lactic acid and ammonium in the body. High levels of ammonium can affect muscle function. In the first five minutes of training, glutamine levels will rise and catabolic hormones will be released. The bad news is that even after training, muscles will continue to release glutamine, leading to serious loss. The higher the training intensity, the faster the loss rate.