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They lost an average of about 27 pounds (12.3 kilograms) during the weight-loss phase of the study and returned for follow-up evaluation one year after weight loss.
The aerobic-exercise program involved 40-minute sessions of walking or jogging on a treadmill, while the resistance-exercise program involved a comprehensive weight-training circuit. Both exercise groups were scheduled to exercise three times per week during the weight-loss phase and twice per week for the following year.
At the one-year follow-up, the women assigned to exercise groups who were able to stick to their program had gained back an average of about 7 to 9 pounds (3 to 4 kilos), but those who were assigned to no exercise or who were unable to stick to their program gained back, on average, more than 13 pounds (6.2 kilos).
In addition, abdominal fat—also known as “visceral fat,” and widely accepted to be the form most dangerous to health—did not increase in women who continued to exercise, but increased by 25 to 38% in nonexercisers. There were no differences between the effects of aerobic exercise and resistance exercise.
The authors concluded that “as little as 80 min per week aerobic or resistance training had modest positive effects on preventing weight regain following a diet-induced weight loss. More importantly, though, both aerobic and resistance training prevented regain of potentially harmful visceral fat.”
There are lots of reasons to avoid regaining weight you’ve lost. Weight gain, even in normal-weight people, is frequently accompanied by increases in cholesterol levels and blood pressure, and increases the risk of cardiovascular disease, diabetes, and some cancers. Abdominal fat has a particularly strong association with diabetes and cardiovascular disease, and appears to be more strongly linked to hormone-sensitive cancers such as breast cancer than fat that is deposited elsewhere on the body.
In addition to maintaining a regular exercise program, here are some suggestions to help you manage your weight: