The Energy Expenditure Laboratory is equipped with the latest technology to assess resting metabolism and exercise patterns in infants, children and adults. The Energy Expenditure Laboratory is an essential component of our Inpatient Unit that complements our Diet Assessment and Body Composition Laboratory.
Basal metabolism or resting energy expenditure is assessed using the MOXUS modular metabolic system from AEI technologies. Resting energy expenditure represents the amount of calories required by the body during a non-active period of 24-hours. The instrument derives energy expenditure from oxygen consumption (VO2) and carbon dioxide production (VCO2) measured from expired gases. The measured VO2 and VCO2 are used to calculate the respiratory quotient or RQ (VCO2/VO2) and resting energy expenditure using the Weir equation:
REE = [VO2 (3.941) + VCO2 (1.11)] 1440 min/day. Where VO2 = oxygen uptake (ml/min) and VCO2 = carbon dioxide output (ml/min).
Exercise patterns in infants, children and adults are measured using the ACTICAL Physical Activity Monitors by Philips Respironics. ACTICAL uses a small, omnidirectional accelerometer that accurately measures a subject’s physical activity level and step count. The digital integration data acquisition system incorporates intensity of movement into the Activity Count total. ACTICAL is a waterproof device that allows users to bathe, shower and swim with no fear of data loss or damage. The ACTICAL system can be worn at the waist, the wrist or the ankle.