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PLoS One. 2013 Jul 31;8(7):e69377. doi: 10.1371/journal.pone.0069377. Print 2013.

Longer leukocyte telomeres are associated with ultra-endurance exercise independent of cardiovascular risk factors.

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1
School of Health Sciences, University of Ballarat, Mt Helen, Australia.

Abstract

Telomere length is recognized as a marker of biological age, and shorter mean leukocyte telomere length is associated with increased risk of cardiovascular disease. It is unclear whether repeated exposure to ultra-endurance aerobic exercise is beneficial or detrimental in the long-term and whether it attenuates biological aging. We quantified 67 ultra-marathon runners' and 56 apparently healthy males' leukocyte telomere length (T/S ratio) using real-time quantitative PCR. The ultra-marathon runners had 11% longer telomeres (T/S ratio) than controls (ultra-marathon runners: T/S ratio = 3.5±0.68, controls: T/S ratio = 3.1±0.41; β = 0.40, SE = 0.10, P = 1.4×10(-4)) in age-adjusted analysis. The difference remained statistically significant after adjustment for cardiovascular risk factors (P = 2.2×10(-4)). The magnitude of this association translates into 16.2±0.26 years difference in biological age and approximately 324-648bp difference in leukocyte telomere length between ultra-marathon runners and healthy controls. Neither traditional cardiovascular risk factors nor markers of inflammation/adhesion molecules explained the difference in leukocyte telomere length between ultra-marathon runners and controls. Taken together these data suggest that regular engagement in ultra-endurance aerobic exercise attenuates cellular aging.

PMID:
23936000
PMCID:
PMC3729964
DOI:
10.1371/journal.pone.0069377
[Indexed for MEDLINE]
Free PMC Article
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