Mixed
Baseline levels of physical activity and fitness do not significantly predict the rate of telomere length shortening over a 5-year period in older adults, although cross-sectional associations exist.
Don't just rely on your current fitness level to protect your cells. This study suggests that *changes* in your activity and fitness over time are what matter for telomere health. If you are sedentary, increasing your leisure-time activity and functional fitness may help slow cellular aging, even if you were previously active.
In longitudinal analyses, no significant associations of baseline PA and PF with change in TL were observed.
Why this rating
Robust longitudinal design with repeated measures, but the null finding for baseline metrics is specific to this cohort and timeframe.
Source
Physical Activity, Physical Fitness, and Leukocyte Telomere Length
Luísa Soares‐Miranda et al. · Medicine & Science in Sports & Exercise · 2015
DOI 10.1249/mss.0000000000000720
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