Table 2.

Comparison of range of motion between this study and previous studies in all loading motions.

	Anteflexion/extension	Lateral bending	Rotation
Zheng et al[38]	11.1°	7.6°	3.8°
Cai et al[39]	8.03°	7.5°	4.16°
Qin et al[40]	17.43 ± 2.68°	17.41 ± 4.17°	8.65 ± 2.66°
Our study	12.84°	8.03°	6.4°