Exercise For An Hour A Day, Seven Days A Week

Excerpt from The Journal of the American Medical Association, March 24/31. 2010:

“Objective: To examine the association of different amounts of physical activity with long-term weight changes among women consuming a usual diet.

…Participants: A prospective cohort study involving 34 079 healthy US women (mean age, 54.2 years) from 1992-2007…

Conclusions: Among women consuming a usual diet, physical activity was associated with less weight gain only among women whose BMI was lower than 25. Women successful in maintaining normal weight and gaining fewer than 2.3 kg over 13 years averaged approximately 60 minutes a day of moderate-intensity activity throughout the study. “

I read this report with mixed feelings.