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Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence
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Telomeres, Aging and Exercise: Guilty by Association?

Warrick Chilton1, Brendan O'Brien2, Fadi Charchar3,4,5

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Telomere length, a marker of cellular aging, may not reliably indicate biological age or benefit from physical activity. Current evidence is inconsistent, questioning its role as an aging biomarker.

Keywords:
agingassociationbiomarkerphysical activitytelomeres

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Area of Science:

  • Genetics
  • Molecular Biology
  • Gerontology

Background:

  • Telomeres are DNA sequences protecting chromosome ends.
  • Telomere shortening is linked to cellular aging and age-related diseases.
  • Physical activity is hypothesized to positively influence telomere length.

Purpose of the Study:

  • To critically review evidence linking telomere length to aging.
  • To evaluate the association between physical activity and telomere length.
  • To discuss potential mechanisms and future research.

Main Methods:

  • Literature review of studies on telomere length, aging, and physical activity.
  • Analysis of evidence supporting and refuting proposed associations.
  • Examination of biological mechanisms.

Main Results:

  • Evidence for telomere length as a reliable aging biomarker is inconsistent.
  • A significant portion of studies show no association between physical activity and telomere length.
  • The proposed links are often equivocal.

Conclusions:

  • Telomere length does not meet criteria for a definitive aging biomarker.
  • The association between physical activity and telomere length requires further investigation.
  • Future research should clarify these complex relationships.