Development of a Mechanistic Hypothesis Linking Compensatory Biomechanics and Stepping Asymmetry during Gait of Transfemoral Amputees
Table 3
Interlimb external work on CoM for controls and two transfemoral amputees during the 0-100% gait cycle of slow, normal, and fast speed walking, with results from the single sample -test between amputee and sample of control subjects. Wp = positive work (J/kg); Wn = negative work (J/kg); Wt = total work (J/kg), where .
Work (J/kg)
Control subjects
Amputee: C-Leg/Mauch
Mean/(SD)
Intact side
Prosthesis side
Slow
Norm
Fast
Slow
Norm
Fast
Slow
Norm
Fast
Impulse
Wp
0.295 (0.061)
0.367 (0.078)
0.500 (0.138)
0.254
0.423
0.658‡
0.108†
0.126†
0.234†
0.218†
0.254†
0.450
0.057†
0.087†
0.151†
Wn
0.307 (0.046)
0.372 (0.074)
0.525 (0.125)
0.105†
0.268†
0.369†
0.168†
0.251†
0.294†
0.069†
0.130†
0.572
0.156†
0.184†
0.134†
Wt
0.602 (0.083)
0.739 (0.145)
1.024 (0.245)
0.359†
0.691
1.027
0.276†
0.377†
0.528†
0.287†
0.384†
1.021
0.213†
0.271†
0.285†
Gravity
Wp
0.320 (0.062)
0.354 (0.079)
0.442 (0.112)
0.249†
0.320
0.402
0.238†
0.297
0.348
0.297
0.315
0.664‡
0.264†
0.378
0.303†
Wn
0.281 (0.055)
0.327 (0.084)
0.402 (0.107)
0.277
0.350
0.492
0.224†
0.289
0.289†
0.332‡
0.341
0.455
0.261
0.413‡
0.466
Wt
0.601 (0.105)
0.681 (0.154)
0.844 (0.210)
0.526
0.670
0.894
0.462†
0.585
0.637†
0.629
0.656
1.119‡
0.525
0.791
0.769
†Significantly lower at ;‡Significantly higher at .