Exercise effective and safe in patients with moderate kidney disease

August 22, 2013

A structured exercise and lifestyle program can improve fitness, body composition, and heart function in patients with kidney disease, according to a study appearing in an upcoming issue of the Clinical Journal of the American Society of Nephrology (CJASN). The findings suggest that patients with kidney disease can benefit from greater physical activity and can do so safely even though they may have other medical problems.

Approximately 60 million people globally have (CKD). These individuals have a high risk of dying prematurely from heart disease, and they usually have very poor levels of fitness. In the general population, improving fitness can improve , but it is not known if this is true in patients with CKD. Nor is it known if this can be done safely as these individuals often have many other medical problems such as diabetes and high blood pressure.

Nicole Isbel, MD, Erin Howden, PhD (Princess Alexandra Hospital and University of Queensland, in Brisbane Australia), and their colleagues sought to develop an exercise and program that was safe and effective for patients with moderate CKD. The program they designed was managed by a multidisciplinary team including a kidney specialist, a specialized nurse practitioner, an , a dietitian, a diabetes nurse, and a psychologist. Components included 150 minutes per week of moderate as well as group behavior and lifestyle modification sessions. Eighty-three patients were randomized to either take part in the program or receive usual care.

"We were hoping to see that patients became fitter and lost weight and learned techniques that would help them maintain this change," explains Dr. Isbel. The researchers also looked at patients' heart function before and after 12 months of the program.

At the beginning of the study, only 45% of patients could achieve their age-predicted . Those who participated in the program for 12 months were significantly fitter—with an 11% increase in their maximal aerobic capacity compared with a 1% decrease in patients receiving usual care. Patients in the program also achieved a small but significant amount of weight loss. "We demonstrated that this could be done safely in spite of patients having a number of other health problems. This was in part because of the expertise of the multidisciplinary team, who frequently adjusted diabetic and blood pressure medications," said Dr. Isbel. Importantly, the researchers also saw that there was an improvement in heart function in patients in the intervention group.

"Our findings suggest that with the inclusion of structured exercise training and the right team support, improvements in fitness are achievable even in people with multiple health issues," said Dr. Howden. "Improvements in fitness translate not only to improved health outcomes, but result in gains that are transferable to tasks of everyday life." Larger studies with longer follow up are required to determine whether including this type of program as standard care may reduce CKD patients' risk of dying prematurely from heart disease, she added.

Explore further: Most people with moderate kidney disease have medication-resistant hypertension

More information: The article, entitled "Effects of Exercise and Lifestyle Intervention on Cardiovascular Function in CKD," will appear online on August 22, 2013, DOI: 10.2215/CJN.10141012

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