![]() ![]() When you repeatedly starve yourself, those enzymes simply become better at their job, an evolutionary strategy meant to keep you alive during times of famine. The other thing that frequently happens with yo-yo dieting is that you train your fat storage enzymes to be more efficient. To bring your metabolic rate up, one of the best things you can do is regain some of that lost muscle by adding weight training to your routine. This shift in body composition is one of the things people refer to when they talk about their metabolism being "ruined" by dieting. Fat is basically metabolic "dead weight." When you lose a lot of muscle, you lose one of your biggest allies in the war against fat. Most of your calories are "burned" by muscle tissue. You now have a significantly higher percentage of body fat. So at the end of the day, you weigh the same as before, but your body composition is significantly different. This time, almost all of the regained weight is going to be fat, and virtually none of it is going to be muscle. Now let's say that you go off the diet and regain that 50 pounds. (These percentages aren't exactly right, but they're good for the purpose of illustration.) You've now lost about 25 pounds of muscle and 25 pounds of fat. Let's further assume that about half of the weight you lost is fat and half of it is muscle. Let me explain.įor the sake of example, let's say you lose 50 pounds just by dieting. You may have some metabolic issues due to yo-yo dieting, and understanding how your personal metabolism works can only help you in your weight loss journey. Have I ruined my metabolism?Ī The idea that people can "ruin" their metabolisms is a very disempowering notion. Q I've been dieting constantly on and off for years since I was a teenager, and have lost and gained the same 50 pounds more times than I can count. ![]() By Jonny Bowden, MA, CNS (see more from this expert) ![]()
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