Physical activity is closely connected to immune function, as regular exercise can help to boost the immune system. Moderate, regular exercise enhances circulation, which allows immune cells to travel more efficiently throughout the body. Additionally, physical activity can promote healthy inflammation responses and reduce the risk of chronic diseases that weaken the immune system. Conversely, excessive or intense exercise without adequate recovery may temporarily suppress immune function, increasing susceptibility to illness. Therefore, maintaining a consistent exercise routine is vital for overall immune health.