Table 2 Comparison of postural parameters between regional‐level and high‐level soccer players with eyes open or closed in the two conditions.

Group	Condition	Vision	Surface area	Velocity
RL	REF	EO	115.3 (54.2)	6.0 (1.2)*
		EC	114.8 (55.3)	6.4 (1.2)*†
	MAN	EO	387.7 (175.2)‡	9.8 (2.9)*‡§
		EC	496.7 (355.2)‡	13.3 (4.9)*†‡§¶
HL	REF	EO	171.1 (73.1)	5.0 (1.1)
		EC	187.0 (138.2)	6.0 (1.7)†
	MAN	EO	274.5 (132.2)‡	6.2 (1.9)‡
		EC	392.3 (306.1)‡	8.0 (2.5)†‡¶

EC, eyes closed; EO, eyes open; HL, high level; MAN, manipulated condition; REF, reference condition; RL, regional level.

*Significant group effect (RL or HL).

†Significant vision effect (EO or EC).

‡Significant condition effect (REF or MAN).

§Significant group–condition interaction (p<0.05).

¶Significant condition–vision interaction.

Mean (SD) values of the centre of foot pressure (COP) surface area (mm²) and the COP velocity (mm/s).