Document Detail

Telomere length and long-term endurance exercise: does exercise training affect biological age? A pilot study.
MedLine Citation:
PMID:  23300766     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Telomeres are potential markers of mitotic cellular age and are associated with physical ageing process. Long-term endurance training and higher aerobic exercise capacity (VO(2max)) are associated with improved survival, and dynamic effects of exercise are evident with ageing. However, the association of telomere length with exercise training and VO(2max) has so far been inconsistent. Our aim was to assess whether muscle telomere length is associated with endurance exercise training and VO(2max) in younger and older people.
METHODS: Twenty men; 10 young (22-27 years) and 10 old (66-77 years), were studied in this cross-sectional study. Five out of 10 young adults and 5 out of 10 older were endurance athletes, while other halves were exercising at a medium level of activity. Mean telomere length was measured as telomere/single copy gene-ratio (T/S-ratio) using quantitative real time polymerase chain reaction. VO(2max) was measured directly running on a treadmill.
RESULTS: Older endurance trained athletes had longer telomere length compared with older people with medium activity levels (T/S ratio 1.12±0.1 vs. 0.92±0.2, p = 0.04). Telomere length of young endurance trained athletes was not different than young non-athletes (1.47±0.2 vs. 1.33±0.1, p = 0.12). Overall, there was a positive association between T/S ratio and VO(2max) (r = 0.70, p = 0.001). Among endurance trained athletes, we found a strong correlation between VO(2max) and T/S ratio (r = 0.78, p = 0.02). However, corresponding association among non-athlete participants was relatively weak (r = 0.58, p = 0.09).
CONCLUSION: Our data suggest that VO(2max) is positively associated with telomere length, and we found that long-term endurance exercise training may provide a protective effect on muscle telomere length in older people.
Ida Beate Ø Østhus; Antonella Sgura; Francesco Berardinelli; Ingvild Vatten Alsnes; Eivind Brønstad; Tommy Rehn; Per Kristian Støbakk; Håvard Hatle; Ulrik Wisløff; Javaid Nauman
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-12-26
Journal Detail:
Title:  PloS one     Volume:  7     ISSN:  1932-6203     ISO Abbreviation:  PLoS ONE     Publication Date:  2012  
Date Detail:
Created Date:  2013-01-09     Completed Date:  2013-06-27     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  101285081     Medline TA:  PLoS One     Country:  United States    
Other Details:
Languages:  eng     Pagination:  e52769     Citation Subset:  IM    
K. G. Jebsen Center of Exercise in Medicine at Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
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MeSH Terms
Cross-Sectional Studies
Muscle, Skeletal / metabolism
Oxygen Consumption
Physical Endurance
Physical Fitness
Pilot Projects
Telomere / genetics*
Telomere Homeostasis*

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