Table 3.  Co-contraction index before and after each HAL-SJ intervention.

		HAL session 1		HAL session 2		HAL session 3
		Extension	Flexion	Extension	Flexion	Extension	Flexion
ST–VM	Pre-HAL	3.6 ± 1.9	4.9 ± 7.3	3.4 ± 1.9	6.4 ± 8.6	5.3 ± 2.8	7.9 ± 7.9
	Post-HAL	4.2 ± 2.4	5.4 ± 8.2	3.0 ± 0.9	6.1 ± 6.9	3.7 ± 1.8	8.7 ± 8.4
	P-value	0.245	0.408	0.574	0.721	0.058	0.32
	Effect size	0.26	0.06	0.24	0.05	0.66	0.09
BF–VL	Pre-HAL	7.4 ± 5.6	3.4 ± 4.4	10.6 ± 5.1	5.1 ± 5.3	12.7 ± 9.3	6.4 ± 5.7
	Post-HAL	9.0 ± 8.6	4.2 ± 4.3	7.4 ± 3.4	4.6 ± 4.4	12.3 ± 9.3	6.3 ± 5.6
	P-value	0.400	0.482	0.437	0.572	0.344	0.894
	Effect size	0.21	0.15	0.75	0.09	0.04	0.02

ST, semitendinosus; VM, vastus medialis; BF, biceps femoris; VL, vastus lateralis.