Gear Shifting of Quadriceps during Isometric Knee Extension Disclosed Using Ultrasonography

Table 2

Cluster distance between contraction group and relaxation group.

Subject	Euclidean distance (mm)
	#A-#A′	#B-#B′	#C-#C′
1	17.3	13.6	3.1
2	14.6	13.5	10.8
3	16.9	2.1	6.6
4	12.6	17.5	8.3
5	26.2	4.7	5.8
6	12.1	2.7	2.3
7	2.9	9.8	6.6
8	5.2	0.4	6.7
Mean	11.3	5.0	5.7