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Table 2 Maximum knee power during three sub-phases of gait normalized to body weight by prosthesis

From: Impact on gait biomechanics of using an active variable impedance prosthetic knee

Speed (m/s)

 

Pre-string power (W/kg)

Initial string flexion power (W//kg)

String extension power (W/kg)

Subject

C-Leg

VI Knee

C-Leg

VI Knee

C-Leg

VI Knee

1

S2

0.12 ± 0.02

0.16 ± 0.01 *

−0.58 ± 0.05

−0.41 ± 0.05

0.01 ± 0.00

0.22 ± 0.10 *

S3

0.09 ± 0.02

0.95 ± 0.27 *

−1.74 ± 0.29

−3.12 ± 0.43 *

0.20 ± 0.01

1.05 ± 0.08 *

S4

0.15 ± 0.03

0.32 ± 0.16 *

−0.66 ± 0.11

−0.75 ± 0.10

0.14 ± 0.02

0.22 ± 0.03 *

S8

0.09 ± 0.04

0.48 ± 0.07 *

−0.83 ± 0.09

−1.02 ± 0.09 *

0.25 ± 0.04

0.98 ± 0.07 *

S11

0.08 ± 0.03

0.49 ± 0.23 *

−0.80 ± 0.09

−1.11 ± 0.20 *

0.19 ± 0.01

0.66 ± 0.06 *

1.25

S2

0.11 ± 0.02

0.13 ± 0.00 *

−0.88 ± 0.16

−0.69 ± 0.09

0.01 ± 0.00

0.27 ± 0.02 *

S3

0.13 ± 0.02

0.86 ± 0.17 *

−2.02 ± 0.11

−3.52 ± 0.12 *

0.20 ± 0.01

1.10 ± 0.07 *

S4

0.21 ± 0.10

0.27 ± 0.03

−1.07 ± 0.26

−1.10 ± 0.08

0.23 ± 0.01

0.28 ± 0.01 *

S8

0.20 ± 0.03

0.80 ± 0.12 *

−0.98 ± 0.08

−1.21 ± 0.04 *

0.38 ± 0.02

0.96 ± 0.09 *

S11

0.09 ± 0.01

0.84 ± 0.39 *

−1.47 ± 0.03

−1.45 ± 0.27

0.18 ± 0.01

0.71 ± 0.01 *

  1. Significant (p < 0.05) improvements are noted by an “*”, significant reductions are noted by a “