Table 2. Comparisons of the knee joint reposition error depending on different ankle weights (mean ± SD) (Unit: degrees).

Group	Ankle weight
	0 kg	0.5 kg	1.0 kg	1.5 kg
Young (n=11)	2.71 ± 1.24	2.49 ± 1.33	2.00 ± 1.28	2.52 ± 1.14
Elderly (n=10)	4.49 ± 1.76*	3.53 ± 1.85*	3.38 ± 1.26*	3.93 ± 1.57*

*p<0.05, significantly different between the young and the elderly.