Anabolic exercise in haemodialysis patients: a randomised controlled pilot study

Area of Science:

• Exercise physiology
• Nephrology
• Clinical trials

Background:

• The impact of progressive resistance exercise training (PRET) on muscle anabolism in hemodialysis patients remains unclear.
• This pilot study investigated high-intensity intradialytic PRET's efficacy in reversing muscle atrophy and improving strength and function in hemodialysis patients.
• A secondary aim was to compare the anabolic response in hemodialysis patients to that of healthy individuals undergoing the same program.

Purpose of the Study:

• To determine if high-intensity intradialytic PRET can reverse muscle atrophy in hemodialysis patients.
• To assess the effects of intradialytic PRET on strength and physical function in hemodialysis patients.
• To compare the anabolic response to intradialytic PRET between hemodialysis patients and healthy individuals.

Main Methods:

• A single-blind, controlled study involving 23 hemodialysis patients and 9 healthy individuals.
• Participants were randomly assigned to either intradialytic PRET (high-intensity leg extensions) or an attention control (SHAM) group for 12 weeks.
• Outcomes included muscle volume (MRI), strength (isometric dynamometer), and physical function, analyzed using a per-protocol method with between-group comparisons.

Main Results:

• Intradialytic PRET induced a significant anabolic response in hemodialysis patients, comparable to that in healthy participants.
• Both hemodialysis patients and healthy participants demonstrated increased strength following PRET.
• Improvements in lower body functional capacity were observed exclusively in the healthy participants.

Conclusions:

• Intradialytic progressive resistance exercise training (PRET) effectively stimulates anabolic and strength responses in hemodialysis patients, similar to healthy individuals.
• The unexpected lack of functional capacity improvement in hemodialysis patients warrants further investigation.
• High-intensity intradialytic exercise is a viable strategy for improving muscle mass and strength in hemodialysis patients.