Walking may help protect kidney patients against heart disease and infections

April 3, 2014, American Society of Nephrology

Just a modest amount of exercise may help reduce kidney disease patients' risks of developing heart disease and infections, according to a study appearing in an upcoming issue of the Journal of the American Society of Nephrology (JASN).

Heart disease and infection are major complications and the leading causes of death in patients with chronic . It is now well established that immune system dysfunction is involved in both of these pathological processes. Specifically, impaired predisposes to infection, while persistent immune activation leads to a state of chronic inflammation that can damage the insides of blood vessels and increase risk. Physical exercise may confer benefits by exerting anti-inflammatory effects and enhancing immunity, but such effects have been largely unexplored in kidney disease.

João Viana, PhD, Nicolette Bishop, PhD (Loughborough University, in the UK), and Alice Smith, PhD (University of Leicester) and their colleagues designed a study to explore the impact of exercise on a range of immune and inflammatory parameters in patients with .

In an acute exercise study conducted in 15 patients, 30 minutes of walking improved the responsiveness of immune cells called neutrophils to a bacterial challenge in the post-exercise period. It also induced a systemic anti-inflammatory environment in the body.

In a regular exercise study, six months of regular walking (30 minutes/day, five times/week) reduced immune cell activation and markers of systemic inflammation in 20 patients compared with another 20 patients who did not increase their usual activity levels over the same period of time.

"Thus, exercise exerts anti-inflammatory effects in patients with kidney disease and may in this way reduce their high risk for heart disease," said Dr. Viana. "Our study also found no evidence that this level of exercise might be harmful to the immune system in people with kidney disease."

Explore further: Autoimmune drug may help prevent kidney disease caused by diabetes

More information: The article, entitled "Evidence for Anti-Inflammatory Effects of Exercise in CKD," will appear online at jasn.asnjournals.org/ on April 3, 2014.

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