For more about these techniques, contact Mac Buchowski, Ph.D..
Measurements of Physical Activity and Fitness Level: To better understand the physiology of activity-associated energy expenditure, a large force platform system has been developed inside the whole room indirect calorimeter to quantify physical activities (body movement, speed, acceleration, the mechanical work performed, and work efficiency of subjects living inside the room). Forces, movements, accelerations, and directional components (vertical and horizontal) are sensed by the transducers and interfaced with a computer and calculated in real time, simultaneously with the minute-by-minute energy expenditure measurement. When combined with electronic sensors placed in the chair, TV, bed, food pass, and others, behavioral patterns such as meals, sleeping, sitting, walking, fidgeting, and exercising are differentiated such that components of energy expenditure are rendered.
Diet Assessment: Core uses the NDS-R software (developed and maintained by the University of Minnesota) as the primary dietary collection and analysis tool for dietary recalls and food records. This software is considered the most accurate and comprehensive nutrient calculation (i.e., gold-standard) software for research purposes. It allows entry of dietary data in a highly standardized fashion using a multiple-pass approach that prompts for complete food descriptions. The system contains detailed descriptions of food preparation methods food portion sizes. The database contains values for 120 nutrients and nutrient ratios in more than 18,000 foods. Trained research personnel using standard protocol record 24-hr recalls during interview sessions. Each 24-hr recall takes 30-45 minutes.