Table 5.

COP parameters during grand-plie (mean ± SD).

Phase		Average Speed (cm/s)	95% Ellipse Area (cm2)	Normalized Maximum Displacement		SD of Displacement
				Anterior-Posterior	Medial-Lateral	Anterior-Posterior	Medial-Lateral
lowering	PRE	10.770 ± 2.467	4.037 ± 2.255	0.329 ± 0.100	0.126 ± 0.049	0.144 ± 0.044	0.050 ± 0.019
	POST	9.507 ± 1.608	3.368 ± 1.454	0.300 ± 0.083	0.100 ± 0.030	0.132 ± 0.045	0.038 ± 0.009
	Effect size	0.61	0.35	0.32	0.64	0.27	0.81
pre-equilibrium	PRE	8.474 ± 2.575	0.847 ± 0.447	0.122 ± 0.047	0.061 ± 0.022	0.054 ± 0.023	0.026 ± 0.009
	POST	7.028 ± 0.765	0.684 ± 0.344	0.113 ± 0.039	0.052 ± 0.014	0.045 ± 0.016	0.021 ± 0.006
	Effect size	0.76	0.41	0.21	0.49	0.45	0.65
equilibrium	PRE	8.073 ± 2.621	0.528 ± 0.315	0.106 ± 0.036	0.051 ± 0.022	0.043 ± 0.015	0.021 ± 0.009
	POST	6.757 ± 0.754	0.523 ± 0.331	0.099 ± 0.031	0.045 ± 0.014	0.028 ± 0.017	0.017 ± 0.006
	Effect size	0.68	0.02	0.21	0.33	0.94	0.52
post-equilibrium	PRE	7.950 ± 2.658	0.512 ± 0.316	0.095 ± 0.034	0.053 ± 0.020	0.040 ± 0.016	0.021 ± 0.008
	POST	6.726 ± 0.732	0.501 ± 0.271	0.096 ± 0.033	0.043 ± 0.013	0.043 ± 0.015)	0.017 ± 0.008
	Effect size	0.63	0.04	0.03	0.59	0.19	0.50
rising	PRE	10.079 ± 2.604	2.674 ± 1.596	0.246 ± 0.095	0.099 ± 0.042	0.116 ± 0.049	0.043 ± 0.018
	POST	9.745 ± 3.989	3.900 ± 5.164	0.280 ± 0.108	0.111 ± 0.142	0.133 ± 0.056	0.042 ± 0.031
	Effect size	0.10	0.32	0.33	0.11	0.32	0.04

COP: center of pressure; SD: standard deviation; PRE: pre-training; POST: post-training; values in bold of difference between test-time indicate significant differences (p < 0.05); 0.5 ≤ Effect size < 0.8: medium effect; Effect size ≥ 0.8: large effect.