Estimation of metabolic energy expenditure from core temperature using a human thermoregulatory model

摘要: Human metabolic energy expenditure is critical to many scientific disciplines but can only be measured using expensive and/or restrictive equipment. The aim of this work determine whether the SCENARIO thermoregulatory model adapted estimate rate (M) from core body temperature (TC). To validate method M estimation, data were collected fifteen test volunteers (age = 23 ± 3yr, height 1.73 0.07m, mass 68.6 8.7kg, fat 16.7 7.3%; mean SD) who wore long sleeved nylon jackets and pants (Itot,clo 1.22, Im 0.41) during treadmill exercise tasks (32 trials; 7.8 0.5km in 1h; air temp. 22°C, 50% RH, wind speed 0.35ms-1). Core temperatures recorded by ingested thermometer pill via whole room indirect calorimetry. Metabolic was estimated for 5min epochs a two-step process. First, given epoch, range values input corresponding TC output. Second, output value with lowest absolute error relative observed epoch identified its selected as that epoch. This process then repeated each subsequent remaining Root square (RMSE), (MAE), bias between 186W, 130 174W, 33 183W, respectively. RMSE total period 0.30 MJ. These results indicate useful estimating when measurement otherwise impractical.