Table 1.

Mean (±s.e.m.) discharge parameters for motor units detected within and after the initial 30 s of a sustained maximal voluntary isometric contraction of extensor hallucis longus

	n	Train onset (s)	Train duration (s)	No. of spikes	Initial firing rate (s)	Change in firing rate (Hz s−1)	Initial CV	Change in CV (s−1)
Units recorded < 30 s	13	9.8 ± 2.4	9.6 ± 1.2	144 ± 21	15.8 ± 1.4	−0.18 ± 0.169	0.18 ± 0.07	1.7 × 10−4± 3.9 × 10−3
Units recorded > 30 s	13	63.5 ± 7.2	16.6 ± 3.7	222 ± 49	13.6 ± 0.7	0.05 ± 0.05	0.17 ± 0.08	−1.9 × 10−3± 2.2 × 10−3

Initial firing rate, mean firing rate for initial segment (at least 50 interspike intervals). Initial CV, coefficient of variation for initial segment (at least 50 interspike intervals).