Testing

Body composition and metabolic rate testing are available at the Corte Madera office.

Indirect Calorimetry - Measuring Resting Metabolic Rate

Indirect calorimetry measures resting energy expenditure (REE), also referred to as resting metabolic rate (RMR) by measuring oxygen uptake. Resting energy expenditure is the amount of energy a person burns in 24 hours when awake and at rest. For each calorie burned, a fixed amount of oxygen is consumed by the human body. Our traditional cart-style indirect calorimeter measures the amount of oxygen consumed over a short period of time and resting energy expenditure (REE) is calculated based on oxygen consumption.

How to Prepare for Your Indirect Calorimetry Test

  • Food - Avoid eating for a minimum of 4 hours prior to testing.
  • Fluids - You may drink a small amount of fluids before testing to maintain normal hydration. Stimulants such as coffee, energy drinks and black teas should be avoided. Ingestion of very cold water just prior to testing may affect results and should be avoided.
  • Medications and Supplements - On test day, you should take all of your prescription medications as directed by your physician. Over-the-counter supplements with stimulant properties such as antihistamines should be avoided.
  • Exercise - Do not exercise prior to testing or participate in any activities that would increase your body temperature.
  • Clothing - Please wear comfortable clothing that allow your to move freely.
  • Illness - Please alert your clinician if you become ill and she will reschedule your test.

Bioelectrical Impedance Analysis (BIA) - Measuring Body Composition

Bioelectrical impedance measures body composition by sending a low level electrical current through the body. This current travels at a different rate through lean body mass, water and fat mass. The different travel rates are measured during the test and the resulting information is used to calculate lean body tissue and fat tissue.

How to Prepare for Your Bioelectrical Impedance Analysis (BIA) Test.

BIA is affected by the amount and type of body water. For the most accurate results, please follow the guidelines below:

  • Food and Water - Do not eat or drink within 4 hours of testing.
  • General Food Intake - Do not severely restrict caloric intake prior to testing. Consume a normal diet for at least 7 days prior to testing.
  • Alcohol - Do not consume alcohol within 48 hours of testing.
  • Exercise - Do not exercise within 12 hours of testing
  • Diuretics - Do not use diuretics within 7 days of testing.
  • Clothing - Please wear comfortable clothing that allow your to move freely.
  • Jewelry and Watches - All metallic objects, including jewelry and watches, should be removed prior to testing.