BOSTON, March 24 (UPI) — For women, who are not overweight, to maintain their weight they may have to exercise at least one hour a day, seven days a week, U.S. researchers suggest.
I-Min Lee of Brigham and Women’s Hospital and Harvard Medical School in Boston and colleagues says that in 2008, federal guidelines recommended at least 150 minutes per week of moderate-intensity activity for “substantial health benefits.”
However, the researchers examined the association of different amounts of physical activity with long-term weight changes among women consuming a usual diet and not reducing calories.
The study involved 34,079 middle-aged women, who were tracked for about 13 years from 1992-2007. A total of 4,540 women with a body mass index lower than 25 — considered normal weight — at the start of the study successfully maintained their weight.
Women, who successfully maintained normal weight and gained fewer than 6 pounds over 13 years averaged approximately 60 minutes a day of moderate-intensity activity throughout the study.
The findings are published in the Journal of the American Medical Association.
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