Table 1.

Motor unit and task characteristics

	Tonic (n = 22)	Intermittent (n = 31)
Recruitment threshold (% MVC)	23.1 ± 13.1 (7.6–57.7)	36.7 ± 8.0 (22.0–55.0)
De-recruitment threshold (% MVC)	8.4 ± 13.6 (2.6–53.6)	35.0 ± 11.2 (14.1–53.9
Target force (% MVC)
Relative to MVC force	17.2 ± 11.7 (4.1–47.1)	26.1 ± 7.8 (13.5–44.6)
Below recruitment threshold	5.9 ± 2.5 (3.1–10.6)	10.7 ± 2.9 (6.8–21.3)
Contraction time (s)
Task duration	167 ± 155 (70–538)	313 ± 256 (46–1365)
Time to recruitment	67 ± 88 (1–294)	103 ± 158 (3–815)

Values are mean ±s.d. (range).