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I read this in The 7 Secrets of Slim People, several web sites and learned through my own personal experience.Originally Posted by Meg
Hi there Soon - I'm intrigued by what you said -- can you point me to some sources for that statement? I've done a lot of reading about metabolism, weight loss, and maintenance and hadn't heard that before. Certainly losing weight can slow your metabolism by reducing your muscle mass (preventable)and your leptin levels (not preventable), but that can happen with a diet at any calorie level. So I'm curious about why a 1200 - 1500 calorie diet would cause a metabolic slowdown? And what the process is that 'corrects' the slowdown?
Back in November 2004 my doctor told me to go on a low calorie diet. Instead I went online and did some research. What I found was the opposite of what my doctor recommended. Low calorie doesn't work because the body believes it is starving and will hold onto the fat. So I purchased a book from a web site where I had read this information and started to apply what I learned. Of course I didn't realize that 1800 calories a day wasn't going to cut it either. I was losing weight but it was very slow and I lacked energy. That's when I came upon a support list based on the book, Burn The Fat, Feed The Muscle, which also confirmed that low calorie diets don't work.
It takes the body a while to adjust to a higher caloric intake and then fat loss begins. Since my nutrition program was not an extreme deficit it took 6 months total to see results. I increased my calories from 1800 to 2000-2400. Within 8 weeks the weight started coming off. During that time I decreased my aerobics from 45 minutes a day, 6 days a week to 20-30 minutes a day, 4 to 5 times a week. I continued my strength training, 3 days a week, 20-30 minutes a day. I also added a stretching program.
Losing muscle mass is what happens on a low calorie diet. The body has to get its fuel from somewhere and it will take it from the muscles.
What corrects the slow down? Enough calories consumed each day and throughout the day, about every 2 to 3 hours (5 to 8 meals), so the body has energy for fuel, proper functioning, nutrients, losing fat and add to that the right amount of exercise. The Harris-Benedict Formula can help determine this. It is less accurate with very lean and very obese persons however it worked for me (I was almost 200 pounds over weight). Then taking 15-20%, a maximum of 20% is recommended, off that daily recommended caloric intake and that will result in fat loss. Some people can take 30% off the number especially in cases where they have a lot to lose. I've gone between 25 and 30%. It is also best to fluctuate the caloric intake, having low and high days, to prevent plateaus or stalls.
There are lots of other components to this. It isn't just one thing. It's a combination of many things which work together to produce the results.
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BTW, all diets have to be 'deficit diets' in order to work. In other words, we have to create a calorie deficit by eating less and/or moving more to lose fat. No calorie deficit = no fat loss.
I am well aware of the need for a deficit. However too much deficit and your body will hold onto the fat and most of the time you'll gain weight. That's why 1200 calorie diets don't work for very long. Initially you may lose weight and then the body adjusts to the extreme deficit. BTW, all diets have to be 'deficit diets' in order to work. In other words, we have to create a calorie deficit by eating less and/or moving more to lose fat. No calorie deficit = no fat loss.
The best way to achieve calorie deficit is through both nutrition and exercise. That's because exercise loses one type of fat and nutrition loses another. And adding strength training to that will help keep more muscles rather than lose them during fat loss.
I've emphasized the word diet because that is the source of the problem. A DIET is about denying the body what it needs. 1200-1500 calories is simply not adequate for fat loss and providing the body with fuel and nutrients for proper functioning.
NOTE: Some bodybuilders eat 1400-1500 calorie or less before a show. My references are for people trying to lose fat.

It was also my puppy's nick name because he loved my homemade puppy cookies.
) but have read – and highly recommend – Burn The Fat, Feed The Muscle. Great plan -- you’ll have lots of success following it, I’m sure! 