Table 1.

One-way ANCOVA tables, separate slopes model testing the effect of oscillation amplitude on mechanical properties, with oscillation frequency as the covariate for either a fixed- or free-coxa leg

Fixed coxa Free coxa
VariableSourced.f.FPd.f.FP
ImpedanceAmplitude44355.4<0.000142874.1<0.0001
Frequency16243.2<0.000111794.0<0.0001
Amplitude × frequency4163.8<0.0001483.6<0.0001
Error5050
Phase shift (δ)Amplitude49.9<0.000144.20.0051
Frequency111.30.0015117.20.0001
Amplitude × frequency40.60.680340.20.9210
Error5050
Hysteretic stiffness (k)Amplitude4667.4<0.00014218.1<0.0001
Frequency11191.3<0.00011291.3<0.0001
Amplitude × frequency425.9<0.000142.10.0958
Error5050
Damping factor (γ)Amplitude43.00.029541.70.1725
Frequency12.80.099810.10.7130
Amplitude × frequency40.10.968340.90.4605
Error4545
  • Frequency values were log10-transformed prior to statistical analysis.