Table 3. Summary of statistical results (ANOVAs) of COP sway parameters.

These results depict the effects of fatigue (time), sex, vision, and fatigue-related interactions during quiet standing (QS) and standing forward leaning (FL) tasks. The results are shown for the COP data that are not normalized by anthropometric variables (weight, height, and BMI).

Type of task	Effects	COP sway parameters
		AP position		ML position		velocity		Area
		F	P	F	P	F	p	F	P
QS	Time	9.810	<0.001	4.150	0.002	3.404	0.007	2.679	0.027
	Sex	13.93	0.002	1.336	0.264	0.229	0.638	1.828	0.194
	Vision	4.104	0.059	0.022	0.883	95.63	<0.001	179.5	<0.001
	Time x sex	1.023	0.392	0.879	0.479	1.605	0.167	0.337	0.889
	Time x vision	9.167	<0.001	2.273	0.054	1.398	0.233	1.537	0.187
	Time x vision x sex	1.020	0.395	1.214	0.310	2.181	0.064	0.580	0.715
FL	Time	4.219	0.002	2.766	0.023	3.038	0.014	1.430	0.222
	Sex	14.96	0.001	1.385	0.255	0.317	0.581	0.542	0.472
	Vision	35.82	<0.001	0.085	0.774	87.90	<0.001	89.76	<0.001
	Time x sex	1.988	0.089	0.819	0.539	2.567	0.033	1.140	0.346
	Time x vision	3.921	0.003	1.664	0.152	1.862	0.110	0.624	0.682
	Time x vision x sex	2.298	0.052	1.623	0.163	1.052	0.393	0.820	0.539

BMI: body mass index = weight/(height)².