How should doctors treat lack of exercise?

Mayo experts say a sedentary lifestyle should be treated by doctors as a medical condition.

By MAYO CLINIC
September 1, 2012 08:48
2 minute read.
Obesity

Obesity 370. (photo credit: Wikimedia Commons)

 
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ROCHESTER, Minn. -- A sedentary lifestyle is a common cause of obesity, and excessive body weight and fat in turn are considered catalysts for diabetes, high blood pressure, joint damage and other serious health problems. But what if lack of exercise itself were treated as a medical condition? Mayo Clinic physiologist Michael Joyner, M.D., argues that it should be. His commentary is published this month in The Journal of Physiology.

Physical inactivity affects the health not only of many obese patients, but also people of normal weight, such as workers with desk jobs, patients immobilized for long periods after injuries or surgery, and women on extended bed rest during pregnancies, among others, Dr. Joyner says. Prolonged lack of exercise can cause the body to become deconditioned, with wide-ranging structural and metabolic changes: the heart rate may rise excessively during physical activity, bones and muscles atrophy, physical endurance wane, and blood volume decline.

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When deconditioned people try to exercise, they may tire quickly and experience dizziness or other discomfort, then give up trying to exercise and find the problem gets worse rather than better.

“I would argue that physical inactivity is the root cause of many of the common problems that we have,” Dr. Joyner says. “If we were to medicalize it, we could then develop a way, just like we’ve done for addiction, cigarettes and other things, to give people treatments, and lifelong treatments, that focus on behavioral modifications and physical activity. And then we can take public health measures, like we did for smoking, drunken driving and other things, to limit physical inactivity and promote physical activity.”

Several chronic medical conditions are associated with poor capacity to exercise, including fibromyalgia, chronic fatigue syndrome and postural orthostatic tachycardia syndrome, better known as POTS, a syndrome marked by an excessive heart rate and flu-like symptoms when standing or a given level of exercise. Too often, medication rather than progressive exercise is prescribed, Dr. Joyner says.

Texas Health Presbyterian Hospital Dallas and University of Texas Southwestern Medical Center researchers found that three months of exercise training can reverse or improve many POTS symptoms, Dr. Joyner notes. That study offers hope for such patients and shows that physicians should consider prescribing carefully monitored exercise before medication, he says.

If physical inactivity were treated as a medical condition itself rather than simply a cause or byproduct of other medical conditions, physicians may become more aware of the value of prescribing supported exercise, and more formal rehabilitation programs that include cognitive and behavioral therapy would develop, Dr. Joyner says.

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For those who have been sedentary and are trying to get into exercise, Dr. Joyner advises doing it slowly and progressively.

“You just don’t jump right back into it and try to train for a marathon,” he says. “Start off with achievable goals and do it in small bites.”

There’s no need to join a gym or get a personal trainer: build as much activity as possible into daily life. Even walking just 10 minutes three times a day can go a long way toward working up to the 150 minutes a week of moderate physical activity the typical adult needs, Dr. Joyner says.

This article was first published at www.newswise.com

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