Featured Research

from universities, journals, and other organizations

Fitness Level, Not Body Fat, May Be Stronger Predictor Of Longevity For Older Adults

Date:
December 5, 2007
Source:
JAMA and Archives Journals
Summary:
Adults over age 60 who had higher levels of cardiorespiratory fitness lived longer than unfit adults, independent of their levels of body fat, according to a new study. Previous studies have provided evidence that obesity and physical inactivity each can produce a higher risk of death in middle-aged adults. Whether this is also true for older adults is uncertain, according to background information in the article.

Adults over age 60 who had higher levels of cardiorespiratory fitness lived longer than unfit adults, independent of their levels of body fat, according to a new study.

Previous studies have provided evidence that obesity and physical inactivity each can produce a higher risk of death in middle-aged adults. Whether this is also true for older adults is uncertain, according to background information in the article.

Xuemei Sui, M.D., of the University of South Carolina, Columbia, and colleagues examined the associations between cardiorespiratory fitness, various clinical measures of adiposity (body fat) and death in older women and men. The study included 2,603 adults age 60 years or older (average age, 64.4 years; 19.8 percent women) enrolled in the Aerobics Center Longitudinal Study who completed a baseline health examination during 1979-2001. Fitness was assessed by a treadmill exercise test and adiposity was assessed by body mass index (BMI), waist circumference, and percent body fat. Low fitness was defined as the lowest fifth of the sex-specific distribution of treadmill exercise test duration. There were 450 deaths during an average follow-up of 12 years.

The researchers found that those who died were older, had lower fitness levels, and had more cardiovascular risk factors than survivors. However, there were no significant differences in adiposity measures. Participants in the higher fitness groups were for the most part less likely to have risk factors for cardiovascular disease, such as hypertension, diabetes, or high cholesterol levels. Fit participants had lower death rates than unfit participants within each stratum of adiposity, except for two of the obesity groups. In most instances, death rates for those with higher fitness were less than half of rates for those who were unfit.

Higher levels of fitness were inversely related to all-cause death in both normal-weight and overweight BMI subgroups, in those with a normal waist circumference and in those with abdominal obesity, and in those who have normal percent body fat and those who have excessive percent body fat.

"... we observed that fit individuals who were obese (such as those with BMI of 30.0-34.9, abdominal obesity, or excessive percent body fat) had a lower risk of all-cause mortality than did unfit, normal-weight, or lean individuals. Our data therefore suggest that fitness levels in older individuals influence the association of obesity to mortality," the authors write.

"Our data provide further evidence regarding the complex long-term relationship among fitness, body size, and survival. It may be possible to reduce all-cause death rates among older adults, including those who are obese, by promoting regular physical activity, such as brisk walking for 30 minutes or more on most days of the week (about 8 kcal/kg per week), which will keep most individuals out of the low-fitness category. Enhancing functional capacity also should allow older adults to achieve a healthy lifestyle and to enjoy longer life in better health."

Journal reference: JAMA. 2007;298(21):2507-2516.


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Cite This Page:

JAMA and Archives Journals. "Fitness Level, Not Body Fat, May Be Stronger Predictor Of Longevity For Older Adults." ScienceDaily. ScienceDaily, 5 December 2007. <www.sciencedaily.com/releases/2007/12/071204163249.htm>.
JAMA and Archives Journals. (2007, December 5). Fitness Level, Not Body Fat, May Be Stronger Predictor Of Longevity For Older Adults. ScienceDaily. Retrieved July 29, 2014 from www.sciencedaily.com/releases/2007/12/071204163249.htm
JAMA and Archives Journals. "Fitness Level, Not Body Fat, May Be Stronger Predictor Of Longevity For Older Adults." ScienceDaily. www.sciencedaily.com/releases/2007/12/071204163249.htm (accessed July 29, 2014).

Share This




More Health & Medicine News

Tuesday, July 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Generics Eat Into Pfizer's Sales

Generics Eat Into Pfizer's Sales

Reuters - Business Video Online (July 29, 2014) Pfizer, the world's largest drug maker, cut full-year revenue forecasts because generics could cut into sales of its anti-arthritis drug, Celebrex. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Nigeria Ups Ebola Stakes on 1st Death

Nigeria Ups Ebola Stakes on 1st Death

Reuters - Business Video Online (July 29, 2014) Nigerian authorities have shut and quarantined a Lagos hospital where a Liberian man died of the Ebola virus, the first recorded case of the highly-infectious disease in Africa's most populous economy. David Pollard reports Video provided by Reuters
Powered by NewsLook.com
Running 5 Minutes A Day Might Add Years To Your Life

Running 5 Minutes A Day Might Add Years To Your Life

Newsy (July 29, 2014) According to a new study, just five minutes of running or jogging a day could add years to your life. Video provided by Newsy
Powered by NewsLook.com
Ebola Outbreak Poses Little Threat To U.S.: CDC

Ebola Outbreak Poses Little Threat To U.S.: CDC

Newsy (July 29, 2014) The Ebola outbreak in West Africa poses little threat to Americans, according to officials with the Centers for Disease Control and Prevention. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins