Research
Mixed
Age-related declines in skeletal muscle mitochondrial function and mass are primarily driven by physical inactivity rather than chronological aging itself, and these declines can be attenuated or reversed by exercise and caloric restriction.
If you are older, your mitochondrial health is not doomed by age alone. The key lever is physical activity. Regular exercise, particularly resistance training, can reverse or prevent the decline in mitochondrial function typically associated with aging. Focus on staying active rather than accepting decline as inevitable.
GoodQualifiesHIGH confidence
it has become increasingly clear that most of the declines in mitochondrial function attributed to chronological age are instead a result of physical inactivity. When physical activity levels are matched between young and old subjects or physical activity is otherwise taken into account, most studies find no age-related changes in mitochondrial enzyme activities, mitochondrial respiration, or ATP flux.
Why this rating
Based on a comprehensive review of multiple human and animal studies, though some conflicting data exists.
Source
Skeletal Muscle Mitochondria and Aging: A Review
Courtney M. Peterson et al. · Journal of Aging Research · 2012
DOI 10.1155/2012/194821
narrative_reviewCited 310×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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