Abstract
BackgroundIntradialytic exercises are recommended to be available as a treatment for enhancing physical functioning. However, there have been few reports which evaluated the results of long-term mild intradialytic exercises in elderly patients. The purpose of this study is to investigate the changes in body weight, body composition, and laboratory data in elderly hemodialysis patients after 1-year intradialytic leg exercises with resistance bands.MethodsA retrospective study. Twenty-one outpatients, aged 65 or older (mean ± SD, 75.2 ± 5.1 years), received intradialytic leg exercises with resistance bands for a year were analyzed. The values of dry weight, body composition, and laboratory data were collected from the year-ago period, at baseline and 1 year after baseline. Fat and muscle mass were evaluated by using a multi-frequency bioimpedance device.ResultsPhysical performance changed and body weight increased after 1-year resistance band exercises. However, the participants gained fat mass, not muscle mass. Although the changes in biochemical data related to protein intake were equivocal, triglyceride levels increased significantly after 1-year exercises. An elevation in serum creatinine levels was observed, even if solute clearance increased significantly.ConclusionsOne-year intradialytic leg exercises with resistance bands may have a potential clinical benefit for body mass index even in elderly hemodialysis patients. However, optimal dietary modification is needed to achieve a balanced increase of muscle and fat mass. An increase of serum creatinine levels does not always mean muscle mass hypertrophy.
Highlights
Intradialytic exercises are recommended to be available as a treatment for enhancing physical functioning
Multi-frequency bioimpedance analysis is known to be useful for assessing volume status using the values of total body water (TBW), intracellular water (ICW), and extracellular water (ECW) in hemodialysis patients [9]
We investigated the changes in body weight, body composition, and laboratory data in elderly hemodialysis patients to know whether long-term intradialytic exercises may have some benefits for the entire body, even if the exercises were only for legs
Summary
Intradialytic exercises are recommended to be available as a treatment for enhancing physical functioning. There have been few reports which investigated the results of 1-year continuous intradialytic exercises only for legs about the changes in body weight and body composition in elderly patients excluding seasonal influences [8]. Multi-frequency bioimpedance analysis is known to be useful for assessing volume status using the values of total body water (TBW), intracellular water (ICW), and extracellular water (ECW) in hemodialysis patients [9]. It provides the information of body composition such as fat mass in hemodialysis patients [10]. The fat tissue index (FTI) and skeletal muscle mass index (SMI) have been used to evaluate fat mass and muscle mass, respectively, and the SMI is used for the diagnosis of sarcopenia when muscle mass is measured by bioelectrical impedance analysis [11,12,13,14]
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