Home-based exercise and bone mineral density in peritoneal dialysis patients: a randomized pilot study

Area of Science:

• Nephrology
• Bone Metabolism
• Geriatric Medicine

Background:

• Patients with chronic kidney disease (CKD) have a higher prevalence of osteopenia and osteoporosis.
• Physical exercise is known to prevent bone loss in hemodialysis (HD) patients.
• Limited research exists on the effects of exercise in peritoneal dialysis (PD) patients.

Purpose of the Study:

• To evaluate the impact of a home-based exercise program on bone mineral density (BMD) in patients undergoing peritoneal dialysis (PD).
• To assess changes in physical function and physical activity levels in PD patients participating in a home-based exercise program.

Main Methods:

• A randomized controlled trial involving stable PD outpatients.
• Intervention group: 6 months of home-based exercises (resistance, stretching, aerobic).
• Control group: Usual care (stretching, regular physical activity).
• Primary outcome: BMD of lumbar spine and proximal femoral neck (dual X-ray absorptiometry).
• Secondary outcomes: Physical function and physical activity.

Main Results:

• No significant changes in BMD at the lumbar spine, femoral neck, or hip after 6 months in either group.
• The exercise intervention group showed significant improvements in the 30-s chair-stand test, 6-min walk test, and physical activity levels.
• No significant within-group changes in BMD were observed.

Conclusions:

• Home-based exercise programs do not appear to improve BMD in PD patients.
• Improvements in physical function and physical activity may contribute to a reduced risk of falls in this population.