What are the acute effects of exercise on NK cells and immune interactions?

The acute effects of exercise on natural killer (NK) cells and immune interactions are notable for their positive influence on the immune system. Following acute exercise, studies have demonstrated that the activity and number of NK cells can actually increase, leading to enhanced immune function. This boost in NK cell activity is beneficial because NK cells play an essential role in the body’s defense against viruses and tumor cells.

Exercise promotes an improved circulation of immune cells, allowing them to travel more effectively throughout the body and respond to infections or abnormal cells. This dynamic enhances the body’s ability to mount a robust immune response, supporting overall health and resilience against pathogens.

While other options suggest inactivity, growth in size, or decreased immune function, they do not reflect the established scientific understanding of exercise's initial stimulating effects on NK cells and immune interactions.