Older people with better cardio-respiratory fitness appear to live longer than unfit ones—independently of their levels of body fat, according to a new study that recommends a daily brisk walk for fitness.
Previous research found that obesity and inactivity each can produce a higher risk of death in middle age. Whether this is also true for older people has been uncertain, said the authors of the new study, published in the Dec. 5 issue of the Journal of the American Medical Association.
Xuemei Sui of the University of South Carolina, Columbia, and colleagues studied a sample of 2,603 women and men aged 60 or older. They found that those who died were older, had lower fitness levels, and had more cardiovascular risk factors than survivors.
Fit subjects had lower death rates than unfit ones within almost every level of adiposity, or body fat, the researchers found. In most instances, they reported, death rates for those with higher fitness were less than half the rates for those who were unfit.
The fat but fit “had a lower risk of all-cause mortality than did unfit, normal-weight, or lean individuals,” the team wrote. Past findings of links between high fat and mortality are probably explained by the fact that leaner individuals tend to be fitter, though this isn’t always true, the authors wrote.
A daily brisk walk of 30 minutes or more “will keep most individuals out of the low-fitness category,” and probably enhance chances of a long life, they wrote.
Source: http://www.world-science.net/othernews/071205_fitness.htm
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Remember ME - You Me and Dementia
Saturday, December 8, 2007
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