For normal-weight women, middle-aged and older, sixty minutes of moderate-intensity physical activity a day is needed to prevent weight gain, according to researchers from Brigham and Women’s Hospital and Harvard Medical School.
Weight tends to gradually increase with age, even among those who have maintained a normal weight in their younger years. After the age of 25 our body naturally gains 1 pound per year, if nothing else changes.
What is moderate-intensity exercise? Experts usually consider it to be strenuous enough to cause a slight but noticeable increase in breathing and heart rate. Hard enough to break a sweat, but not so hard that you can’t comfortably carry on a conversation. In the above study, moderate-intensity exercise was considered the equivalent of one hour a day of brisk walking or 30 minutes a day of jogging or running.
Note: Check with your health care provider before beginning an exercise program. If you have chest pain, feel faint or light-headed, or become extremely out of breath while exercising, stop the activity at once and tell your doctor as soon as possible.
More Information: Exercise
Source: Lee IM, et al “Physical activity and weight gain prevention” JAMA 2010; 303(12): 1173-79.
Source: “Cardiovascular Exercise” from Harvard.edu
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