Table 3. Effect sizes and statistical power for main effects over time and between groups.

Variables	Phase	Analysis F tests	F value	P value	Effect size (ηp2)	Statistical power
Medio-lateral CoP range (cm)	P1	Time	4.063	.057	.162	.485
		Group	.150	.861	.014	.070
		Time × Group	1.311	.291	.111	.252
	P2	Time	.076	.785	.004	.058
		Group	1.018	.378	.088	.204
		Time × Group	.665	.525	.060	.147
Antero-posterior CoP range (cm)	P1	Time	6.314	.020*	.231	.669
		Group	.753	.483	.067	.161
		Time × Group	1.562	.233	.129	.294
	P2	Time	7.211	.014*	.256	.726
		Group	5.888	.009*	.359	.822
		Time × Group	4.643	.021*	.307	.719
Medio-lateral CoP mean velocity (cm/s)	P1	Time	5.928	.024*	.220	.642
		Group	.025	.975	.002	.053
		Time × Group	.738	.490	.066	.158
	P2	Time	.221	.643	.010	.073
		Group	.410	.669	.038	.108
		Time × Group	2.194	.136	.173	.397
Antero-posterior CoP mean velocity (cm/s)	P1	Time	8.994	.007*	.300	.816
		Group	.736	.491	.065	.158
		Time × Group	1.766	.195	.144	.328
	P2	Time	6.944	.015*	.249	.710
		Group	1.727	.202	.141	.321
		Time × Group	5.402	.013*	.340	.787
Vertical ground reaction torque (Nm)	P1	Time	17.259	.000*	.451	.977
		Group	2.169	.139	.171	.393
		Time × Group	1.601	.225	.132	.300
	P2	Time	14.046	.001*	.401	.946
		Group	.025	.975	.002	.053
		Time × Group	2.838	.081	.213	.497
Medio-lateral CoP position within BoS (%)	P1	Time	.574	.457	.027	.112
		Group	1.926	.171	.155	.354
		Time × Group	1.870	.179	.151	.345
	P2	Time	12.194	.002*	.367	.914
		Group	.533	.594	.048	.126
		Time × Group	1.068	.362	.092	.212
Antero-posterior CoP position within BoS (%)	P1	Time	4.254	.052	.168	.503
		Group	2.757	.086	.208	.484
		Time × Group	4.060	.032*	.279	.657
	P2	Time	9.294	.006*	.307	.828
		Group	2.520	.104	.194	.449
		Time × Group	7.761	.003*	.425	.916

* Indicates statistically significant difference p < 0.05.