Figure 2.

VO₂ uptake during a 10 min treadmill test for the four different test situations: blue line indicates conventional walking (CON-W); red line indicates electrical muscle stimulation (EMS)-superimposed walking (EMS-W); green line indicates conventional Nordic walking (CON-NW); and the purple line indicates EMS-superimposed Nordic walking (EMS-NW). The solid line represents the mean on 10 s intervals for all subjects and the dashed line represents the mean value for all subjects over the 10 min measurement time. Solid shows continue steady progress in VO₂ uptake for all measurement conditions with overlaps between two measurement conditions indicating differences in VO₂ uptake between them. Differences in dashed lines support these results.