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Table 4 Mean % errors (± SE) between the model and experimental forces normalized to the experimental peak force and measured at each 5 ms time interval for each subject. Data are the averages (± SE) across 6 IPIs (CFTs or VFTs) or 4 IPIs (DFTs) tested.

From: Development of a mathematical model for predicting electrically elicited quadriceps femoris muscle forces during isovelocity knee joint motion

  -25°/s -75°/s -125°/s -200°/s
%Error CFT VFT DFT CFT VFT DFT CFT VFT DFT CFT VFT DFT
S1 8.2 (1.3) 9.7 (1.2) 10.7 (0.5) 16.7 (0.6) 17.4 (1.2) 16.8 (0.4) 18.8 (4.9) 18.7 (3.4) 11.9 (1.4) 11.6 (0.8) 9 (0.9) 8.6 (1.0)
S2 12.6 (1.6) 13.9 (1.8) 12.4 (1.8) 11.9 (1.8) 10.9 (1.0) 10 (0.5) 16.9 (3.6) 14.9 (2.7) 11.3 (0.7) 18.8 (2.9) 10.1(1.6) 9.5 (2.7)
S3 18.3 (5.3) 17.6 (3.2) 13.5 (3.2) 11.7 (2.1) 10.9 (0.6) 11 (0.6) 12.6 (3.2) 10.6 (1.2) 11(2.5) 20.1(5.4) 12.2(2.0) 11.6(2.4)
S4 11.9 (2.7) 11.2 (2.3) 9.3 (0.8) 21.2 (2.8) 21.5 (1.8) 20.3 (1.0) 35.5 (7.2) 29.1(4.3) 25.1(1.8) 19.2(6.9) 17 (3.1) 10.0(1.2)
S5 24.0 (8.0) 16.5 (4.9) 18.6 (7.8) 17.2 (4.7) 10.9 (0.7) 11.4 (2.7) 17.5 (2.3) 17.6 (2.8) 16.3(1.1) 27.2(3.9) 22.5(1.1) 22.4 (2.0)
S6 9.3 (.14) 8.7 (1.7) 6.9 (1.7) 22.8 (1.9) 20.2 (1.8) 22.5 (1.6) 29.5 (1.7) 23.5 (1.7) 23.6(1.2) 12.3(1.5) 11.4(0.8) 11.0 (1.3)
Mean 14.1 (3.4) 13.0 (2.5) 11.9 (2.6) 16.9 (2.3) 15.3 (1.2) 15.4 (1.1) 21.8 (3.8) 19.1 (2.7) 16.6 (1.5) 18.2 (2.6) 13.7 (1.6) 12.2 (1.8)