Figure 7
Predicted angular excursion, torque time integral (TTI), joint torque at maximum power, angular velocity at maximum power, and maximum power, all due to stimulation (mean ± SD; n = 25 (A) and 10 (B) subjects; 33CFT). Note that initial maximum power was not significantly different between the two loads or between the two pulse durations, but velocity was lowest at the highest load and shortest pulse duration. Isometric TTI (iso; 90°) is shown for comparison. Gray bars = first 33CFT; black bars = average of last half of last set of 33CFTs. Average train durations for 600 μs, 170 μs, 4.5 kg, 9.1 kg, and isometric (600 μs pulse duration) were: 0.24, 0.64, 0.51, 0.89, and 1.00 seconds, respectively. ε – compared to first contraction (p<0.0001); ψ1 – compared to 4.5 kg and 9.1 kg (0.0001≤ p≤0.02), or to 600 μs and 170 μs (p<0.0001); ψ0 – compared to 4.5 kg (0.0001≤ p≤ 0.03) or to 600 μs (0.0001≤ p≤ 0.02).