Research Roundup: August 2010

Female monkeys placed on a low-fat, low-calorie diet (reduced by 30 percent) for one month experienced no significant weight loss, because daily activity and metabolic rate decreased as a result of low calorie intake. A second month of dieting restriction at 60 percent reduction of calories led to further suppression of activity and metabolic rate. But a comparison monkey group fed a normal diet with one hour of daily exercise did lose weight.