Trained older adults showed more youthful muscle profiles
In trained older adults, 50% of age-related differences in muscle gene activity were absent, yielding profiles resembling those of young adults.
Limit: Age differences could explain the trained adults' profiles; the abstract omits exact ages
Edited by Boris Djordjevic · AgingResearch.News
Young and older adults with differing physical function took part in an exercise experiment that measured muscle molecular profiles before and after a single bout of exercise below maximum effort. Researchers analyzed gene activity, fats and other small molecules.
Before exercise, older adults had lower activity of genes associated with cellular energy production and energy use than young adults with comparable activity levels. In trained older adults, 50% of these age-related differences were absent. All participants showed gene-activity responses related to immunity and stress after exercise. Among older adults, greater physical fitness was associated with larger responses.
Why it matters
The study addresses how physical fitness relates to age-associated changes in muscle energy metabolism. The authors present the molecular data as a resource for investigating fitness-dependent aging mechanisms.
Caveats
The abstract does not describe random assignment to sustained training, so baseline group differences do not establish cause and effect. The abstract also does not report participant numbers or exact ages.
Exercise is part of Bryan Johnson's Blueprint
The paper
Amsterdam UMC Location University of Amsterdam; Amsterdam University Medical Centers
Nature Aging, Jul 3, 2026, Open access, accepted manuscript
