The effect of exercise during hemodialysis on serum levels of albumin, calcium, phosphorus and parathyroid hormone: a randomized clinical trial

Abstract

Introduction: Disorders in the levels of blood electrolytes are often considered as complications of kidney illnesses which are responsible for various systemic problems experienced by patients. Objectives: The aim of this study was to investigate the efficiency of an exercise program during hemodialysis on serum levels of biochemical factors such as albumin, calcium, phosphorus and intact parathyroid hormone (iPTH). Patients and Methods: Sixty patients undergoing hemodialysis were evaluated in the clinical trial. The patients in the intervention group pedaled on a stationary bicycle for one hour in every hemodialysis session for eight weeks. At the beginning of the study and at the end of it, the patients’ blood samples were sent to hospital’s laboratory to measure the levels of biochemical factors in blood. Data were analyzed by SPSS software. Results: The serum levels of electrolytes showed no significant improvement between the study groups before and after the exercise program (P>0.05). A significant improvement was observed after the program in serum phosphorus and iPTH (P=0.04). In contrast, serum albumin (P=0.3) and calcium (P=0.5) did not alter significantly after the exercise program. Conclusion: Exercise improved some biochemical factors of blood in the patients undergoing hemodialysis. Exercise is therefore a complementary procedure for these patients. Trial Registration: The trial protocol was approved in the Iranian Registry of Clinical Trial (#IRCT20150116020675N4; https://en.irct.ir/trial/50492, ethical code# IR.MUI.MED.REC.1399.212).