Fig. 1
From: Validity of sports watches when estimating energy expenditure during running
Bland-Altman plots for Suunto Ambit2, Garmin Forerunner920XT, and Polar V800. Presented in groups for low to moderate running intensities (30%, 50%, and 70% vVO2peak) and high-intensity running (90% and 110% vVO2peak). The mean bias is marked as a solid black line, and ±1.96 times standard deviation as dashed black lines. vVO2peak: speed at maximal oxygen uptake