Physical activity plays a vital role in supporting immune function. Engaging in regular exercise can enhance circulation, thereby facilitating the movement of immune cells throughout the body. Moderate exercise has been shown to lead to temporary increases in the production of antibodies and immunoglobulins, effectively boosting the body’s defense mechanisms against infections. Furthermore, physical activity can help reduce stress and improve sleep quality, both of which are beneficial for overall immune health. It's essential to balance activity levels, as excessive exercise can lead to immune suppression, showcasing the importance of moderation.