Neck Flexion Angle Estimation during Walking

Table 2

CVA and NFA in walking case (unit: degrees).

Walking case		Level 1	Level 2	Level 3	Level 4	Level 5
3 km/h	Mean (NFA)	81.4722	74.4427	71.6546	65.7486	58.8117
	Mean (CVA)	45.3579	37.3134	34.1081	28.1364	21.5184
	Mean (NFA − CVA)	36.1144	37.1292	37.5465	37.6123	37.2933
	Var (NFA − CVA)	0.3312	0.1863	0.1491	0.3100	0.5335
4 km/h	Mean (NFA)	82.7458	75.8507	69.3977	65.0855	60.2854
	Mean (CVA)	46.0182	38.7697	31.8672	27.5250	22.9371
	Mean (NFA − CVA)	36.7277	37.0810	37.5305	37.5605	37.3483
	Var (NFA − CVA)	0.9034	0.4096	0.7186	0.8024	0.5123
5 km/h	Mean (NFA)	82.0928	74.7623	69.1052	64.1363	58.7212
	Mean (CVA)	45.9104	37.4357	31.0791	26.0616	21.2336
	Mean (NFA − CVA)	36.1824	37.3266	38.0261	38.0747	37.4876
	Var (NFA − CVA)	0.2328	0.3207	0.1990	0.4291	0.6641