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How much exercise is too much?

Dr. Michael Roizen, MD
Dr. Michael Roizen, MD
Internal Medicine
answer
Exercising is like nuts in at least one way—there is such a thing as too much of a good thing. While exercise has more plusses than a math workbook, you can take it too far: If you burn more than 6,500 calories a week with exercise (that's roughly 13 hours) or if you do more than two hours in a row of straight cardiovascular training. That overuse not only can stress your joints (depending on the exercise), but it also appears to be the level at which you induce too much oxidative stress in your body, and that decreases your longevity.
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National Academy of Sports Medicine
National Academy of Sports Medicine
answer

There is no magic number of minutes that determines how much exercise is too much. It depends on many factors such as your age, weight, medical history, and fitness level. But current research clearly demonstrates that too much exercise may cause harmful effects known as overtraining syndrome.

Overtraining syndrome commonly occurs in athletes or fitness enthusiasts who are training beyond their body’s ability to recover. When an individual is performing excessive amounts of exercise without proper rest and recovery, there may be some harmful side effects. Some of these side effects may include decreased performance, fatigue, altered hormonal states, poor sleeping patterns (insomnia), reproductive disorders, decreased immunity, loss of appetite, mood disturbances, and a compulsive need to exercise.

To help avoid overtraining training be sure to eat a well-balanced diet and strive for a minimum of seven hours of sleep per night. A proper nutrition strategy coupled with adequate rest will help provide you the necessary nutrients and energy your body needs to maintain physical activity.

In addition, it is equally important to listen to your body. If you’re feeling rundown, take a short break from your typical exercise routine and treat yourself to some rest and relaxation.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.