Regular physical activity enhances the immune system by promoting circulation and increasing the efficiency of immune cells. Exercise reduces inflammation and aids in immune regulation, making the body more adept at fighting infections. It encourages the production of antibodies and white blood cells, which play critical roles in immune defense. Additionally, consistent activity may lead to better sleep quality and reduced stress, both of which further support immune health. Overall, engaging in regular physical activity fosters a robust immune response, leading to improved health outcomes.