TABLE 1.
Kinetic and kinematic variables for the preferred and non-preferred leg.
| Preferred | Non-preferred | p-value | ||
| Ground contact time (s) | 0.291 [0.282 0.311] | 0.313 [0.281 0.328] | 0.359 | |
| (0.295 ± 0.037) | (0.307 ± 0.034) | |||
| GRF (N/kg) | Peak | 27.92 [26.83 29.36] (28.94 ± 3.76) | 29.09 [25.30 31.88] (28.98 ± 3.52) | 1.000 |
| Impulse (N⋅s/kg) | 0.61 [0.57 0.63] | 0.63 [0.60 0.65] | 0.203 | |
| (0.61 ± 0.05) | (0.63 ± 0.03) | |||
| Peak joint angles (deg) | ||||
| Ankle | DF | 29 [27 32] | 32 [29 34] | 0.652 |
| (30 ± 6) | (31 ± 5) | |||
| PF | −30 [−31 −27] | −29, [−34 −26] | 0.910 | |
| (−29 ± 4) | (−29 ± 7) | |||
| Knee | Flx | −58 [−61 −56] | −59 [−63 −52] | 0.734 |
| (−58 ± 6) | (−57 ± 6) | |||
| Ext | −9 [−11 −5] | −5 [−11 −4] | 0.734 | |
| (−8 ± 5) | (−7 ± 3) | |||
| Peak joint angular velocities (deg/s) | ||||
| Ankle | DF | 397 [347 455] | 360 [318 482] | 0.820 |
| (391 ± 97) | (395 ± 113) | |||
| PF | −828 [−921 −777] | −845 [−995 −781] | 0.820 | |
| (−864 ± 109) | (−884 ± 141) | |||
| Knee | Flx | −249 [−323 −169] | −232 [−310 −162] | 0.570 |
| (−241 ± 87) | (−235 ± 81) | |||
| Ext | 607 [575 686] | 644 [590 698] | 0.910 | |
| (624 ± 97) | (617 ± 92) | |||
| Peak joint moments (Nm/kg) | ||||
| Ankle | PF | −4.3 [−4.4 −3.9] | −4.3 [−4.7 −3.9] | 0.821 |
| (−4.3 ± 0.5) | (−4.3 ± 0.6) | |||
| Knee | Flx | −1.3 [−1.5 −1.1] | −1.1 [−1.3 −0.9] | 0.164 |
| (−1.4 ± 0.3) | (−1.2 ± 0.6) | |||
| Ext | 2.9 [2.6 3.2] | 2.5 [2.3 2.9] | 0.204 | |
| (2.8 ± 0.5) | (2.6 ± 0.5) | |||
| Peak joint power (W/kg) | ||||
| Ankle | Abs | −13.0 [−17.3 −8.1] | −12.1 [−14.5 −8.5[ | 0.250 |
| (−13.0 ± 5.1) | (−11.7 ± 3.3) | |||
| Gen | 27.2 [26.4 34.5] | 27.2 [23.3 30.2] | 0.250 | |
| (23.0 ± 5.5) | (28.4 ± 6.0) | |||
| Knee | Abs | −4.9 [−6.0 −4.0] | −5.1 [−6.5 −4.6] | 0.734 |
| (−5.0 ± 1.9) | (−4.9 ± 2.2) | |||
| Gen | 10.7 [9.0 13.2] | 9.2 [8.6 13.0] | 0.570 | |
| (10.8 ± 3.3) | (10.6 ± 3.1) | |||
| Joint work (J/kg) | ||||
| Ankle | Neg | −1.7 [−2.0 −1.3] | −1.8 [−2.3 −1.3] | 0.910 |
| (−1.8 ± 0.7) | (−1.9 ± 0.7) | |||
| Pos | 4.5 [3.9 5.5] | 4.3 [3.7 5.0] | 0.359 | |
| (4.8 ± 1.4) | (4.5 ± 0.9) | |||
| Net | 3.1 [2.3 4.0] | 2.4 [2.0 3.6] | 0.129 | |
| (3.0 ± 1.2) | (2.5 ± 0.7) | |||
| Knee | Neg | −0.5 [−0.7 −0.3] | −0.6 [−0.8 −0.4] | 0.570 |
| (−0.5 ± 0.2) | (−0.5 ± 0.3) | |||
| Pos | 2.0 [1.5 2.6] | 1.5 [1.3 2.4] | 0.301 | |
| (2.0 ± 0.7) | (1.9 ± 0.6) | |||
| Net | 1.4 [0.9 1.9] (1.5 ± 0.7) | 1.2 [0.9 1.6] (1.3 ± 0.5) | 0.203 | |
Values are medians [25% quartile 75% quartile] (means ± SD). GRF, ground reaction force; DF, dorsiflexion, PF, plantar flexion/flexor; Flx, flexion/flexor, Ext, extension/extensor; Abs, absorption; Gen, generation; Neg, negative; Pos, positive. No significant differences between preferred and non-preferred leg were found.