Open window phenomenon

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The open window phenomenon is a term used in psychoneuroimmunology and describes the immunological gap after sporting stress on the organism. It has been proven that infectious diseases are more common after intense exposure.

The increased risk of illness (predominantly flu infections , urinary tract infections and diarrhea ) following physical or psychological stress can be objectified by laboratory medicine. Immune parameters such as the number of granulocytes , natural killer cells and B- and T-lymphocytes in the blood initially increase under stress, and then fall steeply below the starting level in the relaxation phase . This practically opens a "window to the body" for pathogens .

According to current knowledge, this immunological dynamic is a product of physical and psychological overload.

However, there are ways of keeping the “open window” small and thus minimizing the risks. Sufficient exercise that is fun and enjoyable can lead to increased stress resistance. This is intended to shorten the open window phase.

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