Exercise has a positive relationship with immune system function, as regular physical activity enhances overall immunity. Moderate exercise improves circulation, allowing immune cells to travel efficiently throughout the body. It also reduces inflammation and leads to better nutritional uptake, both of which are crucial in maintaining a robust immune response. Moreover, exercise may contribute to lower stress levels, which can adversely affect immunity. While excessive exercise may pose risks, maintaining a balanced routine can bolster the immune system and improve overall health.