Muscle responds to home exercise in chronic kidney disease
A 12-week randomized trial in 25 people found that a personalized program increased muscles’ capacity to use oxygen.
Limit: Only 19 exercisers and six usual-care participants were studied
Edited by Boris Djordjevic · AgingResearch.News
Twenty-five people with stage 3–5 chronic kidney disease took part in a randomized controlled trial of a 12-week personalized home exercise program. Nineteen exercised, while six received usual care. The program combined high-intensity interval training, power walking and strength training. Researchers took thigh-muscle samples before and after the program.
In the exercise group, muscle capillarization—the extent of its network of tiny blood vessels—increased, along with the capacity to use oxygen. Walking distance showed a trend toward improvement. Researchers detected no significant changes in muscle fiber size, fiber type or the number of muscle stem cells. Measures of fibrosis, or tissue scarring, did not change. However, cells that can contribute to scarring and fat formation decreased with exercise. The researchers suggested this might mean less scarring would accumulate in the future.
Why it matters
Maintaining muscle function is part of healthy aging. The study addressed whether muscle affected by chronic kidney disease can still adapt to exercise.
Caveats
The trial was small, with 19 exercisers and six usual-care participants, all with stage 3–5 chronic kidney disease. It did not establish whether exercise would reduce future muscle scarring.
- Exercise
- High-intensity interval training
- Angiogenesis
- Extracellular matrix remodeling
- Chronic kidney disease
- Humans
Exercise is part of Bryan Johnson's Blueprint
The paper
Skeletal Muscle Adaptation To Home-Based Exercise In Chronic Kidney Disease
University of California
American Journal of Physiology Renal Physiology, Oct 7, 2026
