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Guidelines for Metabolism Testing

Metabolism is the amount of calories that your body burns every day. Total metabolism is equal to your resting metabolism (amount of calories your body burns at rest) + lifestyle/occupational activities + exercise. The test measures resting metabolic rate (RMR), which accounts for approximately 70% of your metabolism. The two factors with the largest impact on RMR are:

1.Total body weight: if you weigh more, your body requires more calories to maintain normal body functions.

2.Total muscle mass: if you have more muscle, your body burns more calories at rest.

Your body combines food (carbohydrates, fats and protein) with oxygen to produce energy. The MetaCheck metabolic test measures the amount of oxygen your body consumes and determines your RMR in calories/day. The MetaCheck will measure your oxygen consumption until it detects a consistent value. Measuring metabolism is the most accurate method for determining your own unique metabolic rate. Knowing your personal RMR allows for more accurate determination of your daily calorie needs, and helps your dietitian plan the most appropriate meal pattern for you.

To obtain an accurate RMR measurement, you will need to follow these guidelines to assure that you are in a resting state. You must not have:

  • Eaten for at least 4 hours (water is OK as long as it is not within 1 hour of test)
  • Exercised for at least 4 hours
  • Had any caffeine or stimulatory nutrition supplements for at least 4 hours
  • Used any form of nicotine for at least 1 hour

Measurement protocol:

Place nose clip over your nose to seal off any air from entering/exiting your nose.  Place mouthpiece into mouth, keeping a tight seal to ensure all air is inhaled/exhaled through the tubing. Relax and breathe normally, if your mouth becomes dry, touch your tongue to the roof of your mouth. You can swallow during the measurement (you may feel your ears plug when you swallow because your nose is plugged). The MetaCheck will beep once when the measurement is complete. The test will take between 10-20 minutes. At the completion of the test, your personal RMR results, and further additional information, will be provided.

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