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Pastimes : Heart Attacks, Cancer and strokes. Preventative approaches
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To: LindyBill who wrote (15065)4/20/2011 9:28:06 AM
From: Pogeu Mahone   of 39297
 
Live and learn
They can do this in a metabolic chamber
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"Blackburn proves this impossible in a closed enviroment and he is still wrong?'

I don't believe he has ever done this. Put a person in a room and fed him though a door for six months? Give me a break."
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Since obesity clearly is an important risk factor for diabetes, researchers are working on developing effective methods for helping heavy people lose weight safely and permanently, and for preventing obesity in people with a genetic inclination to gain weight. To better understand why certain people have a tendency to be overweight and how their bodies react to various diets, NIH researchers are measuring many aspects of energy expenditure using precise and highly sophisticated technology.


Metabolic Chamber
The most accurate methods of determining energy expenditure involve continuous measurements of heat output (direct calorimetry) or exhaled gas exchange (indirect calorimetry) in people confined to metabolic chambers. A metabolic chamber is a small room a person can live in for a 24 hour period, while metabolic rate is measured during meals, sleep, and light activities. Scientists measure the heat released from a person's body to determine how much energy each activity has burned for that person. In indirect calorimetry, researchers measure oxygen consumption, carbon dioxide production and nitrogen excretion to calculate a ratio that reflects energy expenditure.

Both measurements indicate whether a person has a "slow" or "fast" metabolic rate. A person with a lower metabolic rate burns calories slower and is at higher risk for gaining weight than people with higher metabolic rates. Above: staff prepare lunch for research volunteers.
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