Table 3.

Repeated submaximal voluntary contractions

	First Contraction	Middle Contraction	Last Contraction
Tinterp, % MVC	9.5 ± 1.0	8.2 ± 0.9	3.1 ± 0.3*
VA, %	77.0 ± 2.3	70.3 ± 3.3	63.7 ± 3.0*
CAR, %	92.5 ± 0.7	89.8 ± 1.0	86.6 ± 1.0*

Values are averages ± SD of the estimates from 10 repetitions of the simulated protocol for amplitude of T_interp, VA, and CAR in the first, middle, and last contractions of a series of simulated contractions sustained at 20% MVC during which peripheral fatigue developed and repeated until the endurance limit. Peripheral fatigue was modeled as a time-varying decrease in the amplitude of the force twitch of the active motor units.

^*Statistically significant change at the end of the simulated contraction protocol (P < 0.05, 2-tailed 2-sample t-test).