Older Women Who Trained Saw an Inflammation Signal Drop
Graded Preliminary — a 48-week exercise program plus mouse and cell experiments; the abstract gives neither the number of participants nor how groups were assigned.
- Design
- Non-randomized trial
- Participants
- —
- Duration
- 11 months
- Funding
- National Research Council of Science and Technology; National Research…
In older women who exercised for 48 weeks, the inflammation messenger CXCL2 fell, while inflammation rose in those who did not exercise.
Older women who exercised regularly for 48 weeks became stronger, more mobile and better at endurance tasks. Over the same period, an immune messenger in their blood called CXCL2 fell sharply, along with a second inflammation marker. In the group that did not exercise, physical performance declined and these inflammation levels rose.
The researchers first spotted CXCL2 in public data on gene activity. In older adults, blood levels were higher the more severe their age-related muscle loss. Higher levels also tracked closely with poorer physical performance. In experiments with mice and cells, the messenger rose when muscles wasted or were injured. A single bout of endurance running turned it down. When the team blocked the docking site for CXCL2 in the lab, signals of muscle breakdown weakened.
This points to CXCL2 as one link between aging and muscle loss. Whether lowering CXCL2 itself slows muscle loss in people was not tested, because the blocking was done only in the lab. The abstract also does not say how many people took part or whether groups were chosen at random.
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.