Dr. Lee said because the basis of IOM's findings have been questioned, she and other researchers decided to look at the issue within the group of women participating in the federal Women's Health Study. She also said the goal was to look at women who weren't dieting and were consuming a normal diet to see what impact physical activity has on weight.

Lee說，由于美國醫學研究所研究結果的基礎受到了質疑，她和其他研究人員決定在參與了“聯邦女性健康研究項目”的女性人群中考察這個問題。她還說，目的是對沒有節食、飲食正常的女性進行研究，考察體育運動對體重會造成怎樣的影響。

Overall, women gained an average of 5.7 pounds in the study. However, those who were normal weight, with a body-mass index of less than 25, maintained their weight if they exercised for 60 minutes a day. Women who exercised less generally gained weight. Dr. Lee said for overweight or obese women, 60 minutes of exercise a day wasn't enough to maintain weight, suggesting calories need to be cut.

總體來講，研究期間這些女性的體重平均增加了5.7磅。不過，那些體重正常、體重指數(BMI)不到25的女性，如果每天鍛煉60分鐘，得以保持體重。運動量較少的女性體重往往會增加。Lee說，對體重超重或肥胖的女性來說，每天鍛煉60分鐘是不足以保持體重的，她建議要減少熱量的攝入。