Tips to Improve Your Body’s Immune System

Move Your Body
Regular, moderate exercise can boost several aspects of your body's self-defense system. "Physical activity not only strengthens your cardiovascular system," Berk says, "it improves your mood and reduces stress." Many studies show that long-term training also elevates natural killer-cell activity. But don't push too hard: if your training is unusually prolonged and intense, your risk for illness and infection goes up.