- The Washington Times - Monday, December 27, 2004

Being fit but fat isn’t good enough. Excess weight, all by itself, can take years off your life, even if you get plenty of exercise, a study found.

“There has been some suggestion that if you are particularly active, you don’t have to worry about your body weight, about your diet. That’s very misleading,” said the report’s lead author, Dr. Frank Hu of the Harvard School of Public Health.

The study of 116,500 women was published last week in the New England Journal of Medicine and was based on questionnaires used in the Nurses’ Health Study, which has followed female nurses since 1976, and on death certificates and medical records.

Women who were physically active but obese had almost twice the risk of death of women who were both active and lean. Women who were sedentary but slender were 55 percent more likely to die early. Women who were both sedentary and obese were almost 2 times more likely to die.

“Being physically active did not cancel out the increased mortality of overweight. Being lean did not counterbalance the risk effect of being sedentary,” Dr. Hu said.

An editorial by David R. Jacobs Jr. and Mark A. Pereira of the University of Minnesota noted that the study relied on nurses’ reports of exercise and weight rather than direct measurement and did not include light to moderate exercise — the form most Americans get.

Dr. Timothy Church of the Cooper Institute, which is devoted to research on exercise and health, praised the findings. “If you’re lean but you’re sedentary, don’t fool yourself. You’re still at risk. You need to get physically active,” he said.

A separate study in the journal — the longest look yet at the effects of stomach-stapling and other obesity surgery — found that the weight loss and the protection against diabetes that result are major and long-lasting.

The Swedish study was led by Dr. Lars Sjostrom of Sahlgrenska University Hospital in Goteborg, looked at more than 4,000 subjects, and found that, two years after surgery, patients had lost about 23 percent of their weight on average.

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