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 Gerontoljournal_title
Experimental gerontologyauthors
Savela S,Saijonmaa O,Strandberg TE,Koistinen P,Strandberg AY,Tilvis RS,Pitkälä KH,Miettinen TA,Fyhrquist Fdoi
10.1016/j.exger.2012.02.003subject
Has Abstractpub_date
2013-01-01 00:00:00pages
81-4issue
1eissn
0531-5565issn
1873-6815pii
S0531-5565(12)00034-4journal_volume
48pub_type
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pub_type: 杂志文章,评审
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pub_type: 杂志文章
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journal_title:Experimental gerontology
pub_type: 临床试验,杂志文章
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pub_type: 杂志文章
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