Muscle Mitochondria Stay Adaptable With Age, and Exercise Can Tap Into That
Graded Moderate — mouse experiments plus a cross-sectional biopsy study in 30 human donors aged 17 to 99, though the exercise effect was shown only in mice and the human data are small and correlational.
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This study suggests muscle mitochondria can still respond to physical activity even late in life.
Aging muscles lose power partly because their mitochondria stop working well. But this study in mice and humans (30 donors aged 17 to 99) found that muscle mitochondria remain flexible enough to improve with exercise, even in old age. In mice, the functional gains from exercise depended on mitochondrial changes at structural and enzymatic levels. Mice lacking proper mitochondrial function in muscle couldn't benefit from exercise the same way.
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.