failed to reach significancep = 0.095
This underestimation was significant both for a 10km/h (Wilcoxon, V = 73, p<0.01) and 12km/h (t-test, t(11) = 3.17, p<0.01) treadmill speed, but failed to reach significance for a treadmill speed of 8km/h (t-test, t(11) = 1.825, p = 0.095).