Table 3.
Tasks | Variables | Slip | Non Slip | |
---|---|---|---|---|
Gait |
|
Fall (n = 9) |
Recovery (n = 44) |
(n = 53) |
Xstep (m) | −0.446 ± 0.122 | −0.520 ± 0.134 | 0.646 ± 0.074 | |
Xstride (m) | 0.427 ± 0.190 | 0.418 ± 0.175 | 1.301 ± 0.127 | |
Xslip (m) | 0.281 ± 0.066a | 0.221 ± 0.066 | 0.015 ± 0.009 | |
VBOS, L-TD, pre (m/s) | 1.750 ± 0.270b | 1.391 ± 0.340 | 0.001 ± 0.004 | |
Xslip, max (m) | 0.781 ± 0.333b | 0.560 ± 0.293 | 0.017 ± 0.009 | |
|
VBOS, max (m/s) |
2.513 ± 0.280c |
1.982 ± 0.449 |
0.001 ± 0.007 |
STS |
|
Fall (n = 9) |
Recovery (n = 32) |
(n = 41) |
Xstep (m) | −0.207 ± 0.112e | −0.243 ± 0.099e | ||
Xstride (m) | −0.127 ± 0.100e | −0.160 ± 0.103e | ||
Xslip (m) | 0.256 ± 0.008a | 0.240 ± 0.037Δ | 0.011 ± 0.006 | |
VBOS, L-TD, pre (m/s) | −0.038 ± 0.107d,e | 0.367 ± 0.580e | 0.001 ± 0.003 | |
Xslip, max (m) | 0.258 ± 0.008e | 0.260 ± 0.012Δe | 0.013 ± 0.007 | |
VBOS, max (m/s) | 1.305 ± 0.256e | 1.331 ± 0.304e | 0.001 ± 0.004 |
p < 0.05 vs. recovery (main effect of slip outcome)
p < 0.01 vs. gait-slip recovery (interaction of task and slip outcome)
p < 0.001 vs. gait-slip recovery (interaction of task and slip outcome)
p< 0.001 vs. STS-slip recovery (interaction of task and slip outcome)
p < 0.001 vs. gait-slip (main effect of task).
Travel displacement of slider may exceed 0.24 m, which was the design specification, due to the deformation of the shock absorber from the impact during an actual slip trial.