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Weight Watchers vs. fitness centers
Date:7/2/2008

COLUMBIA, Mo. In the first study of its kind, using sophisticated methods to measure body composition, the nationally known commercial weight loss program, Weight Watchers, was compared to gym membership programs to find out which method wins in the game of good health. A University of Missouri researcher examined the real-life experiences of participants to determine which program helps people lose pounds, reduce body fat and gain health benefits. The answer is that both have pros and cons and that a combination of the two produces the best results.

Participants who attended Weight Watchers for 12 weeks lost an average of 5 percent of their body weight, or about nine pounds. However, Steve Ball, assistant professor of exercise physiology in the MU College of Human Environmental Sciences, found that a large percentage of the lost weight was lean tissue and not fat.

"Participants' body fat percentage did not improve at all because they lost a much higher percentage than expected of lean tissue," said Ball, MU Extension state fitness specialist. "It is advantageous to keep lean tissue because it is correlated with higher metabolism. Losing lean tissue often slows metabolism. What your body is made of is more important than what you weigh."

The majority of other Weight Watcher studies had not considered body fat percentage change and only focused on body weight.

"This is one aspect of our study that makes it unique," Ball said. "We used a sophisticated measure of body composition the Bod Pod to look at what type of weight was lost: lean or fat."

In addition, Ball said the study was novel because Computer Tomography (CT scans) were used to investigate changes in abdominal fat, which is more predictive of cardiovascular disease. Although the fitness center group lost very little weight, they probably improved their health because they lost a significant amount of intraabdominal fat (fat around vital organs). These resul
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Contact: Jennifer Faddis
Faddisj@missouri.edu
573-882-6217
University of Missouri-Columbia
Source:Eurekalert

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