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Nephron. 1991;59(1):84-9.

Effects of exercise training in predialytic uremic patients.

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Department of Medicine, Karolinska Hospital, Stockholm, Sweden.


We examined the effects of physical training in 10 predialytic uremic patients (7 men, 3 women, mean age 47 +/- 8 years) with an average glomerular filtration (GFR) of 15 +/- 7 ml/min x 1.73 m2. All 10 patients participated in an exercise programme 3 times/week for 3 months and were compared to a control group of 9 patients with comparable baseline variables. The exercise group increased its maximal exercise capacity measured by standardized exercise test on a bicycle ergometer, from an average 159 +/- 49 to 174 +/- 57 W (p less than 0.01). They also showed a decrease in heart rate at equal load (138 +/- 29-123 +/- 18 beats/min, p less than 0.05). The control group did not change its exercise capacity (171 +/- 60 and 171 +/- 65 W, respectively, NS), nor its heart rate at equal load (124 +/- 24 and 123 +/- 24 beats/min, respectively, NS). Thigh muscular function assessed by static endurance increased from a median 77 s (range 27-197) to 113 s (range 66-201), p less than 0.002. Dynamic muscular endurance increased from a median number of 41 movements (range 28-105) to 93 movements (range 45-139), p less than 0.001. The corresponding figures for the controls were: static endurance 60 (range 20-209) and 47 s (range 9-203), respectively, NS; dynamic endurance 53 (range 19-190) and 43 movements (range 10-126), respectively, NS. Total hemoglobin, blood volume, GFR, blood pressure and echocardiographic variables remained unchanged during the observation period. We conclude that in predialytic uremic patients, physical training improves exercise capacity mainly due to an improved muscular function.

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