Table 2.

Top speed kinetic and kinematic variables. F_avg, peak vertical GRF (vGRF), step f, L_c, t_sw, t_a, and t_c at top speeds for the UL and AL without and with 100 and 300 g added to the prosthesis. BW is body weight. Data are mean ± s.d. Top speeds were not significantly different between conditions (n = 6). Individual kinetic and kinematic data across speed are provided in the electronic supplementary material.

condition	leg	Favg (BW)	peak vGRF (BW)	step f (Hz)	Lc (m)	tsw (s)	ta (s)	tc (s)
top speed	UL	2.19 ± 0.21	3.88 ± 0.22	4.31 ± 0.27	0.998 ± 0.095	0.370 ± 0.012	0.118 ± 0.007	0.115 ± 0.015
(8.8 ± 1.0 m s−1)	AL	2.02 ± 0.12*	3.34 ± 0.30*	3.98 ± 0.18*	1.039 ± 0.071	0.365 ± 0.017	0.133 ± 0.014	0.119 ± 0.011
top speed + 100 g	UL	2.22 ± 0.24	3.92 ± 0.21	4.06 ± 0.27	1.034 ± 0.086	0.380 ± 0.014	0.127 ± 0.008	0.122 ± 0.017
(8.4 ± 0.9 m s−1)	AL	1.97 ± 0.13*	3.24 ± 0.21*	3.95 ± 0.18*	1.034 ± 0.080	0.377 ± 0.020	0.133 ± 0.008	0.124 ± 0.012
top speed + 300 g	UL	2.22 ± 0.23	3.86 ± 0.42	4.04 ± 0.19	1.016 ± 0.092	0.381 ± 0.004	0.128 ± 0.009	0.121 ± 0.016
(8.5 ± 0.9 m s−1)	AL	1.96 ± 0.15*,**	3.26 ± 0.32*	3.96 ± 0.13	1.047 ± 0.088	0.378 ± 0.011	0.128 ± 0.012	0.125 ± 0.015

*Significant difference between legs (p < 0.05).

**Significant difference between added mass and no load conditions (p < 0.05).