Study Gives The Skinny On "Fit And Fat"

(WebMD)  Regular exercise has long been touted as the key to a healthy heart, but a new study shows it is unlikely to fully reverse a woman's chances of heart disease if she is carrying extra weight.

Researchers report in the April 28 issue of Archives of Internal Medicine that although physical activity definitely helps improve cardiovascular health, such exercise does not "eliminate the negative effects of being overweight."

The findings underscore the importance of being fit and trim and cast doubt on the newer notion that it's possible to be "fit and fat." Both obesity and a sedentary lifestyle are modifiable risk factors for coronary heart disease. Heart disease is the leading cause of death in women in the United States.

Which exerts more influence in one's risk of heart disease: exercise or weight? There's no clear-cut answer. Fat cells release chemicals that can speed up the hardening of arteries, trigger inflammation, and lead to blood clots. Exercise counteracts these potentially heart-damaging processes by improving blood vessel function.

The new study, conducted by Amy R. Weinstein, M.D., MPH, of Beth Israel Deaconess Medical Center in Boston, and colleagues helps establish the combined effect of the two risk factors. The study involved 38,987 women from the Women's Health Study. Each woman provided information about her height, weight, exercise routine, medical history, and other health habits at the beginning of the study. About half of the women were considered to be of normal weight. A little less than one-third of the women were overweight, and 18 percent were obese. According to the Surgeon General's guidelines, 34 percent were considered physically active.

During about 11 years of follow-up, 948 women developed heart disease. According to the researchers, body mass index (BMI) and exercise both individually contributed to its development. A BMI between 25 and 29 is considered overweight. A BMI of 30 or above is considered obese.

The study shows that:

• Active women of normal weight had the lowest heart disease risk.


• Heart disease risk was slightly higher for women of normal weight who were inactive.


• Active women who were overweight or obese were more likely to experience
  heart disease during follow-up than active normal-weight women, but less likely than their inactive counterparts.


• The highest heart disease risk was seen among the most inactive, heaviest
  women.

While the study shows that regular physical activity can reduce one's risk of heart disease, it suggests that weight matters, too.

"Even high quantities of physical activity are unlikely to fully reverse the risk of coronary heart disease in overweight and obese women without concurrent weight loss ," the authors conclude in the journal article. "Regardless of body weight, these data highlight the importance of counseling all women to participate in increasing amounts of regular physical activity and maintaining a healthy weight to reduce the risk of coronary heart disease."
By Kelli Stacy
Reviewed by Elizabeth Klodas
©2008 WebMD, LLC. All rights reserved

[skinnyminny2]

Yeah--lots of us already knew this (but we''re not scientists so it doesn''t matter).

It''s unnerving when a chunkyish woman has the nerve to say she''s just as fit as someone like me, a skinny girl AND an athlete. Guess who''s huffing and puffing after walking up several flights of stairs? Not me (and I live at an elevation of 8,000 ft). My resting heart rate averages in the 40s or 50s because I do actual WORK when running and am also very thin. It makes a huge difference.

[gangesdak]

Women, more than their male counterpart, are drawn toward food. In any self service food line, you will notice, you will have to spend mpre time waiting behind women because they keep investigating the delectability of the spread and keep dipping into the more attractive items more. Perhaps their taste buds are more developed, perhaps they are more greedy. Whatever the reason, a larger percentage of women eat more their share, and get fat. More input, more savings. And that''s the skinny.