Why Chronic Dieting Doesn't Work
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Individuals who diet often can lower their metabolisms enough to decrease their caloric needs. This can be done in two ways.
First, a strict diet of less than about 1000 (a little more for men) calories can actually cause ketosis, a starvation state, and force your body to conserve calories. The body will reduce its caloric needs to survive. Therefore, you won't lose more in the long run on a starvation level 500 calorie diet than you would on one above 1100 calories. The effects of starvation can be long lasting: The metabolism can stay lowered for as long as a year.
Second, chronic dieting can change the body's composition. Let's say you lost 10 pounds in two weeks. much of that weight was water (5 pounds), some was fat (3 pounds), and the rest was muscle (2 pounds). When the weight is regained (as 95% will do), it comes back in the form of fat and water. Every additional diet can cycle this downward trend of loosing muscle until the chronic dieter can change their body fat percentage(or BMI) over time from 25% to 35-40%. Surprisingly, the scale may not show significant amounts of weight change. Muscle burns up more calories than fat and their chronic dieting has made them lose a significant percentage of what helps them keep trim. This yo-yo effect of deprivation and regaining can damage the body. Yo-yo dieting is more dangerous than maintaining an even weight.
The best methods of permanent weight loss involve learning more more nutritious food choices, and getting more exercise. Everyone should take a periodic look at their daily diet and activity levels - and get rid of the idea that a diet is just something that is done for a month, after which you return to the old habits. Slow, gradual, and steady, life style changes are the best, and will ensure long term health and long term weight loss maintenance.
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