Table 5 Within-Group comparison of knee joint peak power at 180°/s Pre- and Post-Intervention (unit: W; M ± SD).

	groups	pre-intervention	post-intervention	t	p	Cohen’s d
Left knee flexion	30 Hz	75.32 ± 3.69	81 ± 2.78	−7.508	< 0.01^##	1.54
	50 Hz	76 ± 9.06	87.92 ± 7.63	−7.580	< 0.01^##	1.32
	control participants	79.84 ± 9.83	81.28 ± 8.01	−0.770	0.449	0.15
Right knee flexion	30 Hz	75.48 ± 4.85	82.32 ± 5.48	−6.282	< 0.01^##	1.41
	50 Hz	72.84 ± 3.56	87.08 ± 4.51	−12.374	< 0.01^##	4.00
	control participants	76.88 ± 6.23	77.64 ± 6.40	−2.282	0.032^#	0.12
Left knee extension	30 Hz	128.68 ± 13.59	136.84 ± 10.09	−5.801	< 0.01^##	0.60
	50 Hz	133.16 ± 9.50	147.20 ± 9.70	−11.141	< 0.01^##	1.48
	control participants	131.24 ± 8.98	133.32 ± 8.25	−1.067	0.297	0.23
Right knee extension	30 Hz	129.40 ± 14.34	145.32 ± 9.93	−7.182	< 0.01^##	1.11
	50 Hz	132.52 ± 11.29	150.28 ± 8.32	−11.076	< 0.01^##	1.57
	control participants	130.24 ± 11.92	132.20 ± 10.05	−0.606	0.550	0.16

(Note: “#” and “##” denote the results of paired-samples t-tests conducted within each group to compare pre- and post-intervention values. # p < 0.05 indicates a significant difference, and ## p < 0.01 indicates a highly significant difference. Cohen’s d is provided as the effect size for within-group comparisons.According to conventional thresholds, Cohen’s d values of 0.2, 0.5, and 0.8 represent small, medium, and large effect sizes, respectively.).

Quick links

Search