. Author manuscript; available in PMC: 2018 Dec 7.

Published in final edited form as: Hum Mov Sci. 2017 May 9;54:154–171. doi: 10.1016/j.humov.2017.04.005

Table A1:

Additional explanatory results in dimensionless and redimensionalized units.

Supplementary Results - Dimensionless							Redimensionalized						Increment Effects
Quantity	Mean ± SD (NS 1.1)	Slope vs. K_Fore P-val	Coef. K_Fore*v P	Slope vs. K_Hind P	Coef. K_Hind*v P	Slope* vs. Speed v P	Mean ± SD (NS 1.1)	Slope vs. K_Fore (units)	Coef. K_Fv (units)*	Slope vs. K_Hind (units)	Coef. K_Hv (units)*	Slope* vs. Speed v (units)	FID +15 N/mm (units)	HID +15 N/mm (units)	VID +0.2 m/s (units)
Prosth. Side Ankle^‡	−0.154±0.013	−1.8E−4	8.8E−4	-	-	−0.13	−120±10 (N-m)	−0.16 (N-m per N/mm)	0.26 (N-m per N/mm per m/s)	-	-	−32 (N-m per m/s)	1.8 (N-m)	-	−4.1 (N-m)
Peak Plantarflexor Moment (Late)	−0.154±0.013	−1.8E−4	8.8E−4	-	-	−0.13
Peak Plantarflexor Moment (Late)		0.41	0.16	-	-	*<0.001*
Prosth. Side Ankle^‡	0.275±0.075	-	-	−1.9E−3	1.2E−2	0.27	692±190 (N-m/s)	-	-	−5.6 (N-m/s per N/mm)	11 (N-m/s per N/mm per m/s)	220 (N-m/s per m/s)	-	100 (N-m/s)	145 (N-m/s)
Mom. Increase Rate (Initial Loading)	0.275±0.075	-	-	−1.9E−3	1.2E−2	0.27
Mom. Increase Rate (Initial Loading)		-	-	0.33	*0.03*	0.35
Prosth Side Knee	−2.32E−2±8.4E−3	−1.3E−4	6.2E−4	1.8E−5	−2.2E−4	−7.5E−2	−58.4±21.2 (W)	−0.37 (W per N/mm)	0.59 (W per N/mm per m/s)	5.1E−2 (W per N/mm)	−0.21 (W per N/mm per m/s)	−61 (W per m/s)	4.2 (W)	−2.6 (W)	−11 (W)
Peak Neg. Power (Early Stance)	−2.32E−2±8.4E−3	−1.3E−4	6.2E−4	1.8E−5	−2.2E−4	−7.5E−2
Peak Neg. Power (Early Stance)		0.48	0.22	0.92	0.64	*0.003*
Prosth Side Knee	2.26E−2±8.7E−3	3.3E−4	−6.5E−4	3.6E−4	−7.0E−4	7.0E−2	56.7±21.8 (W)	0.96 (W per N/mm)	−0.62 (W per N/mm per m/s)	1.0 (W per N/mm)	−0.66 (W per N/mm per m/s)	57 (W per m/s)	4.3 (W)	4.4 (W)	5.7 (W)
Peak Pos. Power (Mid-Stance)	2.26E−2±8.7E−3	3.3E−4	−6.5E−4	3.6E−4	−7.0E−4	7.0E−2
Peak Pos. Power (Mid-Stance)		0.10	0.25	*0.04*	0.13	*0.03*
Prosth Side Ankle^‡	−1.99E−2±7.3E−3	-	-	−3.5E−4	1.7E−3	−0.21	−50.0±18.4 (W)	-	-	−1.0 (W per N/mm)	1.6 (W per N/mm per m/s)	−171 (W per m/s)	-	11 (W)	−20 (W)
Peak Neg. Power (Early Stance)	−1.99E−2±7.3E−3	-	-	−3.5E−4	1.7E−3	−0.21
Peak Neg. Power (Early Stance)		-	-	0.053	*<0.001*	*<0.001*
Prosth Side Ankle^‡	2.11E−2±2.8E−3	1.5E−4	−6.9E−5	2.8E−4	−1.2E−3	1.0E−1	53.0±7.1 (W)	0.44 (W per N/mm)	−6.5E−2 (W per N/mm per m/s)	0.80 (W per N/mm)	−1.2 (W per N/mm per m/s)	83 (W per m/s)	5.6 (W)	−7.3 (W)	11 (W)
Peak Pos. Power (Mid-Stance)	2.11E−2±2.8E−3	1.5E−4	−6.9E−5	2.8E−4	−1.2E−3	1.0E−1
Peak Pos. Power (Mid-Stance)		0.51	0.92	0.07	*0.003*	*0.006*
Prosth Side Ankle^‡	−2.05E−2±5.1E−3	−4.5E−5	9.1E−4	−2.7E−4	6.0E−4	−9.9E−2	−51.6±12.9 (W)	−0.13 (W per N/mm)	0.86 (W per N/mm per m/s)	−0.78 (W per N/mm)	0.57 (W per N/mm per m/s)	−81 (W per m/s)	12 (W)	−2.3 (W)	−9.8 (W)
Peak Neg. Power (Late Stance)	−2.05E−2±5.1E−3	−4.5E−5	9.1E−4	−2.7E−4	6.0E−4	−9.9E−2
Peak Neg. Power (Late Stance)		0.80	0.07	*0.04*	0.09	*<0.001*
Prosth Side Ankle^‡	3.84E−2±1.0E−2	8.3E−5	−2.3E−3	-	-	0.21	96.5±25.7 (W)	0.24 (W per N/mm)	−2.1 (W per N/mm per m/s)	-	-	171 (W per m/s)	−32 (W)	-	15 (W)
Peak Pos. Power (Terminal Stance)	3.84E−2±1.0E−2	8.3E−5	−2.3E−3	-	-	0.21
Peak Pos. Power (Terminal Stance)		0.67	*<0.001*	-	-	*<0.001*

P-values and Slopes vs. Speed are estimated conservatively. P-values are the greater of the P-values of the Speed coefficient in mixed linear regressions with K_Forefoot or K_Hindfoot. Slope values are the lesser of the two Speed coefficients.

Indicates statistical test not performed.

^‡

Ankle definitions for the prosthetic side are approximate, as the system lacks a true ankle joint. NS 1.1: Result for Nominal Stiffness condition at 1.1 m·s⁻¹.