If you have been trying to lose weight for a very long time and it seems that you can't or you are eating the right things but the weight keeps coming back on.... there is new science behind it. Well it turns out that the long-used rule about reducing 3500 calories and losing a pound is not accurate and
can ultimately doom the dieter. This is the conclusion reached by Dr. Kevin Hall and colleagues at the National Institute of Diabetes and Digestive and Kidney Diseases. They authors who published in the Lancet have a new model for how a body responds to changes in calorie intake. The model shows that lasting weight loss needs to have two phases. The first phase is a more aggressive and temporary behavior followed by a more relaxed but permanent change in behavior so that the weight does not creep back on.
According to this study a few extra few calories can cause weight gain. Furthermore the same increase in calories will result in more weight gain in a heavier individual than by a lean person. This probably happens because lean tissue uses more calories than the same weight of fat. The authors think that long term weight loss is very effective because it allows for behavior and life style changes to really settle in.
As for physical activity, a heavier person will lose more weight in the beginning because they need more calories to maintain the weight so any type of activity is going to cause them to lose weight. In other words heavier people burn more calories in an equivalent amount of exercise but as their weight drops, the number of calories used in the exercise does too. However physical activity has been shown to be very important in weight maintenance.
The two tactics that lean people use is that they regularly exercise and they check their body weight often.
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