Skip to content
My WebMD Sign In, Sign Up

Fitness & Exercise

Font Size

Fit Beats Fat for a Longer Life

Obesity Has Lesser Influence on Death Rates in Older People, Study shows
By
WebMD Health News
Reviewed by Louise Chang, MD

Dec. 4, 2007 -- Staying fit is more important than losing fat for older adults, new research suggests.

Fitness was found to be a strong predictor of longevity in the study, which involved adults ages 60 and older, while obesity had little influence on death risk.

Study participants who were more fit, as measured by treadmill exercise testing, had a lower risk of death than those who were unfit, even when they were overweight or obese.

A low level of fitness was associated with a higher risk of death from all causes.

The study is appears in the Dec. 5 issue of The Journal of the American Medical Association.

University of South Carolina diet and exercise researcher Steven N. Blair, PED, says it is increasingly clear that carrying excess weight is less dangerous for older people than for people who are young or middle aged.

While he acknowledges that the idea has its detractors, Blair points out that other studies have also shown this to be the case.

"I don't want to sound like an apologist for obesity," he tells WebMD. "But in older people it is not as important a determinant of mortality as it is in younger people."

Age, Obesity, and Fitness

The newly reported study included 2,603 people in their 60s and older followed for an average of 12 years.

All the participants received detailed health examinations upon study entry, as well as the exercise fitness test and measurements of their body mass index (BMI), waist size, and body fat.

The 20% of participants who performed worst on the treadmill test were considered least fit. Men fell into this category if they could remain on the treadmill for no longer than 7.8 minutes. For women the cutoff was 5.5 minutes.

Age, low fitness level, and having multiple risk factors for heart and vascular disease at study entry were all found to be independently associated with death risk among study participants.

Better fitness was associated with less likelihood of diabetes, high cholesterol, and high blood pressure. Death rates for those with the highest fitness levels were less than half that of those who were physically unfit.

But being overweight and even obese was not an independent predictor of death risk.

Among people who were fit, survival rates were similar for normal weight, overweight, and obese people.

Blair points out that 46% of the people in the study with a BMI of 35 and over (considered extremely obese, by most estimates) did not fall into the lowest or even second lowest fitness categories.

Exercise Linked to Longer Survival

The study is not the first to find fitness among the elderly to be one of the best predictors of survival.

In research reported in 2006, Anne B. Newman, MD, MPH, and colleagues from the University of Pittsburgh found an inability to walk 400 meters, or about a quarter of a mile, to be associated with an increased risk of death in people between the ages of 70 and 79.

Healthy Living Tools

Ditch Those Inches

Set goals, tally calorie intake, track workouts and more, all via WebMD’s free Food & Fitness Planner.

Get Started

Today on WebMD

Wet feet on shower floor tile
Slideshow
Flat Abs
Slideshow
 
Build a Better Butt Slideshow
Slideshow
woman using ice pack
Quiz
 

man exercising
Article
7 most effective exercises
Interactive
 
Man looking at watch before workout
Slideshow
Overweight man sitting on park bench
Video
 
6-Week Challenges
Want to know more?
Chill Out and Charge Up Challenge – How to help your tribe de-stress and energize.
Spark Change Challenge - Ready for a healthy change? Get some major motivation.
I have read and agreed to WebMD's Privacy Policy.
Enter cell phone number
- -
Entering your cell phone number and pressing submit indicates you agree to receive text messages from WebMD related to this challenge. WebMD is utilizing a 3rd party vendor, CellTrust, to provide the messages. You can opt out at any time.
Standard text rates apply

pilates instructor
Slideshow
jogger running among flowering plants
Video
 
Teen girl jogging
Article
Taylor Lautner
Article