Table 2.

The COP movements during the transition from double-leg to single-leg standing

Variablesa	Mean (SD)
APA phase
maximum COP displacement (mm)	-37.7 (16.3)
peak COP velocity (mm/s)	-247.5 (111.8)
Transitional phase
maximum COP displacement (mm)	123.1 (34.5)
peak COP velocity (mm/s)	512.2 (212.6)

SD standard deviation; APA anticipatory postural adjustment; COP center of pressure

^a Positive values indicate COP movements toward the stance-leg side, and negative values indicate COP movements toward the lifting leg side