Final answer:
To boost and maintain immune function, 150 minutes of moderate-intensity exercise per week, spread over 3-5 days, is recommended. This means 30-50 minutes per exercise session.
Step-by-step explanation:
The amount of moderate-intensity exercise needed to boost and maintain immune function is a minimum of 150 minutes divided over 3-5 days per week, as recommended by the U.S. Department of Health and Human Services (HHS) and the American Heart Association. This equates to 30-50 minutes of exercise such as brisk walking, cycling, or any other activity during which a person could talk but not sing, per session. Engaging in these types of aerobic activities not only helps to strengthen the immune system but offers a wide array of health benefits including improving cardiovascular and muscular fitness, increasing bone density and strength, and promoting psychological well-being.