Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Exercise, not diet, may be best defence against heart disease

05.11.2003


Despite widespread attention to diet, calorie intake may not be a major factor in causing death by heart disease, according to a 17-year study of almost 9,800 Americans.

Instead, losing excess weight — or not becoming overweight to begin with — and exercising may do more to ward off death from heart disease, say Jing Fang, M.D., and colleagues from the Albert Einstein College of Medicine in the Bronx, New York.

“The fact is that those who both exercised more and ate more nevertheless had low cardiovascular mortality,” says Fang. Expending energy through physical activity may be the key to cutting the risks of heart disease and living a longer, more healthful life, she says.



The study appears in the American Journal of Preventive Medicine.

The researchers studied data from 9,790 participants in the First National Health and Nutrition Examination Survey, a national study from 1971 to 1975 that was funded by the U.S. government. Fang’s group compared reports of physical activity, body mass index and dietary caloric intake to deaths from heart disease through 1992.

They grouped participants by their initial reports of caloric intake (low, middle, high), recreation exercise (least, moderate, most) and body mass index (normal, overweight, obese). Body mass index is a measure of weight in relation to height.

Overweight and obese participants, those who consumed fewer calories, and those who exercised less were also likely to be older, black, have a lower family income, less likely to have graduated high school, and more likely to have higher blood pressure and cholesterol levels than those who ate and exercised more.

During 17 years of follow-up, 1,531 participants died of heart disease. After adjusting for BMI and physical activity, caloric intake was unrelated to heart disease. Those who exercised more and ate more were both leaner and had less than half the cardiovascular disease mortality than did those who exercised less, ate less and were overweight.

“Subjects with the lowest caloric intake, least physical activity, and who were overweight or obese had significantly higher cardiovascular mortality rates than those with high caloric intake, most physical activity, and normal weight,” Fang says. The difference in mortality rates was 55 percent.

Those who eat less won’t necessarily be thinner, she says, and eating more does not have to translate into obesity. People who were overweight and exercised less at the start faced increased cardiovascular mortality, even if they ate less.

“This suggests that heart disease outcome was not determined by a single factor, but rather by a compound of behavioral, socioeconomic, genetic and clinical characteristics,” she says.

A focus on increased energy expenditure rather than reduced caloric intake may be the most practical outcome of this study, she says, and may offer the most productive behavioral strategy by which to extend healthy life.

Aaron Levin | CfAH
Further information:
http://www.cfah.org

More articles from Health and Medicine:

nachricht Chances to treat childhood dementia
24.07.2017 | Julius-Maximilians-Universität Würzburg

nachricht World first: Massive thrombosis removed during early pregnancy
20.07.2017 | Universitätsspital Bern

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: 3-D scanning with water

3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects

A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...

Im Focus: Manipulating Electron Spins Without Loss of Information

Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.

For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...

Im Focus: The proton precisely weighted

What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.

To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...

Im Focus: On the way to a biological alternative

A bacterial enzyme enables reactions that open up alternatives to key industrial chemical processes

The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....

Im Focus: The 1 trillion tonne iceberg

Larsen C Ice Shelf rift finally breaks through

A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Closing the Sustainability Circle: Protection of Food with Biobased Materials

21.07.2017 | Event News

»We are bringing Additive Manufacturing to SMEs«

19.07.2017 | Event News

The technology with a feel for feelings

12.07.2017 | Event News

 
Latest News

Ultrathin device harvests electricity from human motion

24.07.2017 | Power and Electrical Engineering

Scientists announce the quest for high-index materials

24.07.2017 | Materials Sciences

ADIR Project: Lasers Recover Valuable Materials

24.07.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>