Figure 1. Energy expenditure values at 50% VOmax for Concept II PM3 monitor, the Polar S810i heart rate monitor, SenseWear Pro armband, and indirect calorimetry (IC) on rowing ergometer. B) Energy expenditure values at 70% VOmax for Concept II PM3 monitor, the Polar S810i heart rate monitor, SenseWear Pro armband, and indirect calorimetry (IC) on rowing ergometer (mean ± standard error). * significantly different from IC (p < 0.001).