highly significantp < 0.001
Correlations between beta power and the simultaneously measured absolute force rate (see Methods section on Correlation between beta power and force ) were highly significant at the group level (ON: mean rho = −0.06, p < 0.001, t 17 = −4.7; OFF: mean rho = −0.08, p = 0.009, t 10 = −3.3).