Physical activity in midlife and telomere length measured in old age.

Abstract:

:Physical activity has been associated with alterations in telomere length, a potential indicator of biological aging, but several inconsistencies exist. Our aim was to investigate the associations between physical activity in midlife and leukocyte telomere length (LTL) measured in old age in the Helsinki Businessmen Study, Finland. At entry, in 1974, 782 men (mean age 47) completed a questionnaire about their physical activity and this was collapsed into 3 categories: low (n=148), moderate (n=398) and high physical activity (n=236, 7 of whom had a competitive activity level). After 29-year follow-up in 2003, mean LTL and the proportion of short (<5 kB) telomeres were measured from DNA samples of a random subcohort of survivors (n=204, mean age 76) using the Southern blot technique. Adjusted for age, body mass index (BMI), cholesterol and smoking in 1974, the moderate physical activity group had longer mean LTL (8.27 kB, SE 0.05) than the low (8.10 kB, SE 0.07), or high (8.10 kB, SE 0.05) physical activity groups (P=0.03 between groups). Conversely, the proportion of short telomeres was lowest in the moderate physical activity group (11.35%, SE 0.25), and higher in the high (12.39%, SE 0.29), and the low physical activity (12.21%, SE 0.39) groups (P=0.02 between groups). We conclude that the results of this observational cohort study give support to the idea that both low and high physical activity is in the long-term associated with factors shortening LTL.

journal_name

Exp Gerontol

journal_title

Experimental gerontology

authors

Savela S,Saijonmaa O,Strandberg TE,Koistinen P,Strandberg AY,Tilvis RS,Pitkälä KH,Miettinen TA,Fyhrquist F

doi

10.1016/j.exger.2012.02.003

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

81-4

issue

1

eissn

0531-5565

issn

1873-6815

pii

S0531-5565(12)00034-4

journal_volume

48

pub_type

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