Validity of Energy Expenditure Estimation Equation using Heart Rate in Swimming

PURPOSE: The purpose of this study was to develop an estimation equation that predicts energy expenditure (EE) during swimming exercise based on heart rate (HR). And, we also evaluated the validation for field application and compare it with existing speedbased EE equation.METHODS: A total 63 healthy adults (ages 19-49 years) who could swim at various speeds were conveniently sampled. experiment conducted in indoor 25 m pool. protocol (measurement individual best performance, 0.4, 0.6, 0.8, <1.0 m/s) performed 4 minutes each according level individual. using a portable respiratory gas analyzer (<i>K4b<sup>2</sup></i>, Cosmed, Italy) snorkel (Aqua Trainer Snorkel, Italy). HR measured waterproof chest strap (Polar Electro Oy, Polar V800, Finland). dummy control regression analysis by as dependent variables sex, age, height, weight, independent variables.RESULTS: participants randomly divided into two groups; development (n=42) group (n=21). is follows; EEm=-18.197-1.966 (Gender: men=0, women=1)+.027 (Age, year)+.073 (Height, cm)+.008 (Weight, kg)+.092 (HR, bpm) R<sup>2</sup>=78% (adj. R<sup>2</sup>=77.2%). HR-based (mean=0.7, difference=6.7) verified Bland & Altman plot showed lowest error, followed Monpetit (mean=1.6, difference=11.6) Costill (Mean=0.4, difference=16.7).CONCLUSIONS: developed physical characteristics such weight study. This might be used commercial wearable devices.