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These researchers at Kings College London studied 2,401 men and women twins who underwent questionnaires about their physical activity level, socioeconomic status and whether they smoked.
also analyzed DNA samples of each to study the telomere length in white blood cells, which form the immune system. Species
markers of biological age, telomere-elements at the ends of chromosomes shorten a bit with each replication of chromosomes during the cell cycle of life, reaching a length too short, causing cell aging.
estimated the length of telomeres is reduced each year on average 21 nucleotides or structural units.
In the group of twins studied, less physically active in their leisure time had shorter telomeres than those who did regular exercise during their leisure periods, found these doctors, whose study is reported in the Archives of Internal Medicine, published Journal of the American Medical Association (JAMA).
"The mean difference in leukocyte telomere length among the most active of the group (199 minutes of exercise per week on average) and more sedentary (16 minutes of weekly physical activity) was 200 neucleótidos" said Dr. Lynn Cherkas, lead author of the study.
In other words, "the most active people had telomeres of a length comparable to that of sedentary people ten years younger," he added.
Physical activity may reduce psychological stress and thus their effect on telomeres and the aging process, they estimated.
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