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Fidgeting feet may keep legs healthy when sitting

Fidgeting while sitting can protect the arteries in legs and potentially help prevent arterial disease, new research shows.

Previous research has shown that sitting for an extended period of time at a computer or during a long airline flight reduces blood flow to the legs, which may contribute to the development of cardiovascular disease.

“Many of us sit for hours at a time, whether it’s binge-watching our favorite TV show or working at a computer,” says Jaume Padilla, an assistant professor of nutrition and exercise physiology at the University of Missouri and lead author of the study.

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“We wanted to know whether a small amount of leg fidgeting could prevent a decline in leg vascular function caused by prolonged sitting. While we expected fidgeting to increase blood flow to the lower limbs, we were quite surprised to find this would be sufficient to prevent a decline in arterial function.”

During the study, the researchers compared the leg vascular function of 11 healthy young men and women before and after three hours of sitting. While sitting, the participants were asked to fidget one leg intermittently, tapping one foot for one minute and then resting it for four minutes, while the other leg remained still throughout. On average, the participants moved their feet 250 times per minute.

The researchers then measured the blood flow of the popliteal—an artery in the lower leg—and found that the fidgeting leg had a significant increase in blood flow, as expected, while the stationary leg experienced a reduction in blood flow.

Research has shown that increased blood flow and its associated shear stress—the friction of the flowing blood on the artery wall—is an important stimulus for vascular health. However, fidgeting’s protective role had not been established.

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The researchers caution that fidgeting is not a substitute for walking and exercise, which produce more overall cardiovascular benefits.

“You should attempt to break up sitting time as much as possible by standing or walking,” Padilla says. “But if you’re stuck in a situation in which walking just isn’t an option, fidgeting can be a good alternative. Any movement is better than no movement.”

The study appears in the American Journal of Physiology Heart and Circulatory Physiology. The National Institutes of Health and the Japan Society for the Promotion of Science supported the work. The researchers, who are from the University of Missouri and the University of Texas at Arlington College of Nursing and Health Innovation, have no conflicts of interest to declare related to this study.

Source: University of Missouri