Table 2.

Latency, peak-to-peak amplitude, and duration of transient deflections in left-arm force when tracking low-threshold motor units at the onset and offset of NMES current applied to the right elbow flexors at two pulse widths and two levels of activation

	0.2 Ms			1.0 Ms
	Latency, ms	Amplitude, % MVC	Duration, s	Latency, ms	Amplitude, % MVC	Duration, s
MVC force, 10%
Onset	69 ± 32	−1.02 ± 0.54	0.93 ± 0.39	53 ± 15a	1.02 ± 0.54	0.94 ± 0.55
Offset	133 ± 93	−1.62 ± 1.96	0.77 ± 0.28	77 ± 21a	0.90 ± 0.48	0.86 ± 0.36
MVC force, 20%
Onset	62 ± 19	−1.34 ± 0.97	0.58 ± 0.29d	62 ± 25	1.33 ± 0.83	0.52 ± 0.27d
Offset	91 ± 24b	−1.43 ± 0.86	0.43 ± 0.11d	88 ± 17c	1.64 ± 1.07e	0.54 ± 0.20d

Values are means ± SD. Negative amplitude indicates a downward deflection.

^aP ≤ 0.05 compared with 0.2 ms,

^bP < 0.05 compared with 10% MVC force,

^cP < 0.05 compared with 10% MVC force,

^dP < 0.001 compared with 10% MVC force,

^eP < 0.05 compared with 10% MVC force.