Table 2. The proportions of COP_AP %power in each band.

	LFB (%)		MFB (%)		HFB (%)
	AMTS	DMTS	AMTS	DMTS	AMTS	DMT
Mean	59.7	58.3	38.0	40.6	2.1	1.1	*
SD	19.6	14.7	18.9	14.0	1.4	1.1

COP_AP: anteroposterior components of COP; LFB: low-frequency band; MFB: mid-frequency band; HFB: high-frequency band; AMTS: participants who had the ability to maintain the tandem stance for 20 s; DMTS: participants who had difficulty maintaining the tandem stance for 20 s; SD: standard deviation; *p<0.05