Table 2. Correlations between the coefficient of variation (CoV) for force with the CoV for interspike interval (CoV for ISI) and CoV for filtered cumulative spike train (CoV for fCST) at 8 target forces during isometric contractions with the dorsiflexors.

	CoV for force
	Group	2.5%	5%	10%	20%	30%	40%	50%	60%
CoV for ISI	AG	0.358 n.s.	0.847** p = 0.000	0.348 n.s.	0.701** p = 0.004	0.309 n.s.	0.688** p = 0.005	0.520* p = 0.047	0.575* p = 0.025
	CG	0.821** p = 0.000	0.560* p = 0.030	0.267 n.s.	0.675** p = 0.006	0.610* p = 0.016	0.551* p = 0.033	0.726** p = 0.002	0.524* p = 0.045
CoV for fCST	AG	0.448 n.s.	0.262 n.s.	0.585* p = 0.022	0.536* p = 0.039	0.559* p = 0.030	0.482 n.s.	0.578* p = 0.024	0.692** p = 0.004
	CG	0.425 n.s.	0.578* p = 0.024	0.207 n.s.	0.531* p = 0.042	0.572* p = 0.026	0.580* p = 0.023	0.725** p = 0.002	0.606* p = 0.017

*p < 0.05,**p < 0.01Abbreviation: AG = group trained with alternating leg actions; CG = group trained with bilateral leg actions; n.s. = non-significant.