Exercise and immunity
Battling another cough or cold? Feeling tired all the time? You may feel better if you take a daily walk or follow a simple exercise routine a few times a week.
Yoga is a mind-body exercise which combines stretching and controlled breathing to achieve relaxation and a stabilized mood.
Physical activity contributes to health by reducing the heart rate, decreasing the risk for cardiovascular disease, and reducing the amount of bone loss that is associated with age and osteoporosis. Physical activity also helps the body use calories more efficiently, thereby helping in weight loss and maintenance. It can also increase basal metabolic rate, reduces appetite, and helps in the reduction of body fat.
You get the most benefit from exercise if you do it for at least 30 minutes a day for 5 to 6 days a week. But you do not have to do 30 minutes in a row. Recent studies suggest that you get the same benefits if you work out for 10 minutes 3 times a day that you do during a longer session.
Flexibility exercise in its simplest form stretches and elongates muscles. Disciplines which incorporate stretching with breath control and meditation include yoga and tai chi. The benefits of greater flexibility may go beyond the physical to the improvement of stress reduction and the promotion of a greater sense of well-being.
Information
Exercise helps decrease your chances of developing heart disease. It also keeps your bones healthy and strong.
We do not know exactly if or how exercise increases your immunity to certain illnesses. There are several theories. However, none of these theories have been proven. Some of these theories are:
- Physical activity may help flush bacteria out of the lungs and airways. This may reduce your chance of getting a cold, flu, or other illness.
- Exercise causes changes in antibodies and white blood cells (WBCs). WBCs are the body's immune system cells that fight disease. These antibodies or WBCs circulate more rapidly, so they could detect illnesses earlier than they might have before. However, no one knows whether these changes help prevent infections.
- The brief rise in body temperature during and right after exercise may prevent bacteria from growing. This temperature rise may help the body fight infection better. (This is similar to what happens when you have a fever.)
- Exercise slows down the release of stress hormones. Some stress increases the chance of illness. Lower stress hormones may protect against illness.
Exercise is good for you, but, you should not overdo it. People who already exercise should not exercise more just to increase their immunity. Heavy, long-term exercise (such as marathon running and intense gym training) could actually cause harm.
Studies have shown that people who follow a moderately active lifestyle, benefit most from starting (and sticking to) an exercise program. A moderate program can consist of:
- Bicycling with your children a few times a week
- Taking daily 20 to 30 minute walks
- Going to the gym every other day
- Playing golf regularly
Exercise makes you feel healthier and more energetic. It can help you feel better about yourself. So go ahead, take that aerobics class or go for that walk. You will feel better and healthier for it.
There is no strong evidence to prove that taking immune supplements along with exercising lowers the chance of illness or infections.
References
Best TM, Asplund CA. Exercise physiology. In: Miller MD, Thompson SR. eds. DeLee, Drez, & Miller's Orthopaedic Sports Medicine. 5th ed. Philadelphia, PA: Elsevier; 2020:chap 6.
Jiang NM, Abalos KC, Petri WA. Infectious diseases in the athlete. In: Miller MD, Thompson SR. eds. DeLee, Drez, & Miller's Orthopaedic Sports Medicine. 5th ed. Philadelphia, PA: Elsevier; 2020:chap 17.
Lanfranco F, Ghigo E, Strasburger CJ. Hormones and athletic performance. In: Melmed S, Auchus RJ, Goldfine AB, Koenig RJ, Rosen CJ, eds. Williams Textbook of Endocrinology. 14th ed. Philadelphia, PA: Elsevier; 2020:chap 27.
Version Info
Version: 2.0
Last reviewed on: 2/8/2024
Reviewed by: Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
