Table 3.

Quadriceps muscle strength

Study	Unit	Intervention				Placebo
		operated leg		non-operated leg		operated leg		non-operated leg
		pre-op	post-op	pre-op	post-op	pre-op	post-op	pre-op	post-op
Nishizaki 2015 [30]	Nm/Kg	1.1±0.3	W2:0.9±0.4 W4:1.0±0.4 W6:1.0±0.4	1.3±0.4	W2: 1.3±0.3 W4:1.3±0.4 W6:1.2±0.3	1.1±0.62	W2:0.7±0.9 W4:0.9±0.9 W6: 0.9±0.6	1.3±0.7	W2:1.1±0.6 W4:1.3±0.6 W6: 1.2±0.5
Dreyer 2013 [21]	N	45°:87 ± 9 60°:89 ± 9	W2 45°:45 ± 6 W2 60°:41 ± 6 W6 45°:81 ± 7 W6 60°: 81 ± 7	45°:100 ± 7 60°:109 ± 9	W2 45°:100 ± 10 W2 60°:109 ± 10 W6 45°:104 ± 9 W6 60°: 110 ± 11	45° :87 ± 15 60°97 ± 16	W2 45°:36 ± 7 W2 60°:33 ± 8 W6 45°:69 ± 9 W6 60°: 65 ± 8	45°:112 ± 16 60°:126 ± 18	W2 45°:100 ± 12 W2 60°:105 ± 12 W6 45°:99 ± 12 W6 60°: 112 ± 14
Ninomiya 2023 [31]	Nm/Kg	0.96±0.36	1.19±0.35	1.11±0.40	1.36±0.40	0.87±0.31	0.97±0.33	1.02±0.32	1.13±0.26
Ikeda 2019 [28]	Kgf/Kg	0.24±0.10	0.31±0.08	0.37±0.13	0.43±0.13	0.26±0.06	0.31±0.08	0.31±0.09	0.33±0.09
Dreyer 2018 [35]	N	102.71 ± 9.50	93.63 ± 9.29	113.32 ± 11.16	121.56 ± 11.93	79.95 ± 13.68	81.80 ± 10.54	108.29 ± 12.08	101.89 ± 11.80
Ueyama 2023 [37]	N	130.8 ± 66.7	M48:177.9 ± 62.1	N/R	N/R	136.3 ± 62.0	M48:157.3 ± 60.7	N/R	N/R
Li 2024 [39]	Nm	45.26 ± 1.67	83.22 ± 1.92	N/R	N/R	45.01 ± 1.43	78.06 ± 1.45	N/R	N/R