Welcome to the Get Fit Guys' quick and dirty tips to slim down and shape up.

My name is Ben Greenfield. I'm the Get Fit Guy, and in this episode, you're going to learn about

whether or not you can have a slow metabolism. Now, in my book, which you can check out at

at Get Fit Guy.com, I talk quite a bit about body types and metabolism,

specifically highlighting the fact that each of the eight different body types can have a different metabolic rate,

not to mention different exercise and nutrition needs.

And now, for the first time, in a lab, researchers at the

National Institutes of Health have discovered evidence supporting the fact that people with certain

physiologies lose less weight, especially when on a calorie-restricted diet. Now, in this study,

researchers at the Phoenix Epidemiology and Clinical Research Branch

looked at 12 men and women with obesity while they were inside something called a metabolic chamber.

Now, a metabolic chamber is a small room a person can live in for a 24-hour period while their

metabolic rate is measured during meals, sleep, and light

activities. This, of course, sounds absolutely pleasant. Now, what they do is they then measure the

heat released from a person's body to determine how much energy each activity has burned for that

specific person.

Okay, so scientists use this whole room indirect kilometer to allow energy expenditure to be calculated based on air samples from the metabolic chamber.

And they took baseline measurements of each of the participant's energy expenditure

in response to a day of fasting

and then had each subject follow a six-week phase of 50% calorie reduction.

After accounting for age, sex, race, and initial weight, the researchers found that the

people who lost the least weight during the calorie-reduced diet period also had a metabolism that decreased

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