Fig. 1From: Heart rate agreement between the 20-meter shuttle run test and virtual system in healthy children: a cross-sectional studyMethodological agreement by Bland-Altman analysis for HRmax between VS and 20m-SRT. The y-axis (Bias) is the difference between heart rate means and the x-axis (Mean) is the individual mean for two tests. The bias was 0.1 log (p = 0.18)Back to article page