Exercise Lowers Only One of Three Inflammation Markers in Old Age
Graded Moderate — pooled 26 trials with random assignment and 1,297 participants; only three publications were rated at low risk of bias, and long-term data are missing.
- Design
- Meta-analysis
- Participants
- 1,297
- Duration
- —
- Funding
- —
In older adults with muscle loss or frailty, exercise lowered the inflammation messenger TNF-alpha but not CRP or interleukin-6.
Too many inflammation signals in the blood weaken muscle strength. They are also linked to how muscle loss and frailty develop and worsen in old age. A new analysis of exercise studies found that in older adults with these problems, training lowered one such signal: TNF-alpha, a messenger that drives inflammation. Two other common inflammation markers in the blood, interleukin-6 and C-reactive protein (CRP), showed no clear change.
The researchers pooled 26 trials with 1,297 older adults who had age-related muscle loss, frailty or both. In every trial, chance decided who exercised. The exercise groups did endurance training, strength training or both for at least four weeks. The comparison groups got things like health education or usual care. TNF-alpha fell clearly in people with muscle loss, while no clear difference was detected in frail people.
The evidence has limits. Only three of the 21 included publications were rated at low risk of bias, meaning built in ways that keep errors out. Whether the effect lasts is unknown, because none of the trials collected long-term follow-up data.
Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.