From: Validity of trunk acceleration measurement with a chest-worn monitor for assessment of physical activity intensity
%VO2R vs
Level 1
Level 2
Level 3
Level 4
%HRR
0.54*
0.56*
0.49
0.62*
MA
0.18
0.01
0.23
MSD
0.43
0.33
0.50
0.78**
RMS
0.34
0.27
0.76**