Strengthening the immune system with exercise: This is not a new idea. Disciplined amateur athletes prove that sport and the immune system are linked. Some of them get significantly less sick due to their regular sports sessions. Studies have already found evidence of the effectiveness of sport on the immune system. This is another reason why health experts are certain that physical activity not only improves well-being, but also the immune system. However, the immune booster sport should be used in doses, otherwise, there is a risk of the opposite effect.
Strengthening the immune system: Athletes demonstrate it
A study took a closer look at the whole thing. She compared the activity level to the number of sick days. Result: More intensive training, in which the body sweats a lot, seems to have a positive effect on health. It was found that those study participants who did intensive sport three times a week had the fewest absenteeism days. Test persons who never did intensive sport in their everyday life had the most absent days. This study also found evidence that too much exercise weakens the immune system. If intensive training was carried out several times a week, the number of sick days rose again. 2 With sport it seems like with most things in life: the dose makes the poison.
Exercise and the immune system
Thanks to numerous studies, the secret of physical activity and the immune system has been revealed. On the one hand, muscle activity triggers various immune-protective processes and, on the other hand, movement reduces the risk of inflammatory reactions. This finding is particularly valuable because internal foci of inflammation are involved in many diseases, especially those affecting the cardiovascular system. This results in an unfavorable vicious circle. A too little exercise can increase the risk of inflammation. Elevated levels of inflammation, in turn, can bring the immune system to its knees and thus encourage infections. Therefore, the body’s own defense and sport are a good team.
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Strengthening the immune system through sport: What happens in the body?
When you exercise, your body releases adrenaline. This is the body’s own stress hormone, which used to be used to enable escape. The increased release of adrenaline increases the number of immune cells in the blood. After just a few seconds of physical activity, natural killer cells multiply. These are important helpers that fight tumor cells and virus-infected cells.
Other immune cells such as monocytes, granulocytes, and T and B lymphocytes are now bustling about in the blood. How many immune cells are activated depends on the amount of adrenaline released? In general, the more intense the stress, the more immune cells are activated.
However, it is not recommended to do sports to the point of complete exhaustion, as this can have the opposite effects. More on that later. After the training sessions are shut down, the immune cells in the blood also decrease again.
Even if the initial values return to normal after the body has been flooded with immune cells, a positive effect remains. The cardiovascular system, the metabolism, and the psyche can benefit from the training in the long term.
