Hormonal
Meeting CDC-recommended vigorous physical activity levels (approx. 42 minutes over 3 days) buffers the negative association between chronic psychological stress and telomere length, preventing stress-induced telomere shortening observed in sedentary individuals.
If you are experiencing high chronic stress, vigorous exercise acts as a biological buffer that may protect your cellular aging (telomere length). You do not need to exercise excessively; meeting standard guidelines (approx. 14 minutes of vigorous activity daily, or 42 minutes over 3 days) appears sufficient to neutralize the stress-telomere link. Prioritize vigorous activity specifically when stress levels are high.
Vigorous physical activity appears to protect those experiencing high stress by buffering its relationship with TL... at values higher than 42 minutes, perceived stress was unrelated to TL... at least 14 minutes a day of vigorous exercise appears to be a critical amount for protection from the effects of stress.
Why this rating
Observational/cross-sectional design with a small, specific sample (n=63 post-menopausal women), limiting causal inference.
Source
The Power of Exercise: Buffering the Effect of Chronic Stress on Telomere Length
Eli Puterman et al. · PLoS ONE · 2010
DOI 10.1371/journal.pone.0010837
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