Medically stable sedentary children with CKD, GFR (stage 2 (mild) eGFR of 60-89 ml/min per 1.73 m2, stage 3 (moderate) eGFR 30-59 ml/min per 1.73 m2) stage 4 (severe) eGFR of 15-29 ml/min per 1.73 m2.
Did not yet require renal replacement therapy (non-dialysis).
