Metabolic Effects of Diet and Exercise in Patients with Moderate to Severe CKD: A Randomized Clinical Trial

Published on Oct 16, 2017in Journal of The American Society of Nephrology9.274
· DOI :10.1681/ASN.2017010020
T. Alp Ikizler90
Estimated H-index: 90
(Vandy: Vanderbilt University),
Cassianne Robinson-Cohen34
Estimated H-index: 34
(Vandy: Vanderbilt University)
+ 11 AuthorsJonathan Himmelfarb90
Estimated H-index: 90
(UW: University of Washington)
CKD is steadily increasing along with obesity worldwide. Furthermore, obesity is a proinflammatory risk factor for progression of CKD and cardiovascular disease. We tested the hypothesis that implementation of caloric restriction and aerobic exercise is feasible and can improve the proinflammatory metabolic milieu in patients with moderate to severe CKD through a pilot, randomized, 2×2 factorial design trial. Of 122 participants consented, 111 were randomized to receive caloric restriction and aerobic exercise, caloric restriction alone, aerobic exercise alone, or usual care. Of those randomized, 42% were women, 25% were diabetic, and 91% were hypertensive; 104 started intervention, and 92 completed the 4-month study. Primary outcomes were a change from baseline in absolute fat mass, body weight, plasma F 2 -isoprostane concentrations, and peak oxygen uptake (VO 2 peak ). Compared with usual care, the combined intervention led to statistically significant decreases in body weight and body fat percentage. Caloric restriction alone also led to significant decreases in these measures, but aerobic exercise alone did not. The combined intervention and each independent intervention also led to significant decreases in F 2 -isoprostane and IL-6 concentrations. No intervention produced significant changes in VO 2 peak , kidney function, or urine albumin-to-creatinine ratio. In conclusion, 4-month dietary calorie restriction and aerobic exercise had significant, albeit clinically modest, benefits on body weight, fat mass, and markers of oxidative stress and inflammatory response in patients with moderate to severe CKD. These results suggest healthy lifestyle interventions as a nonpharmacologic strategy to improve markers of metabolic health in these patients.
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