This field study compared the real-time spinal movements and postural variations during smartphone-use versus non-use in university students. Ten males and eight females (mean age of 21.5 ± 2.6 years) participated, with similar daily phone use time between the two sexes. Five inertial motion sensors were attached to the cervical, thoracic and lumbar spinal regions, and kinematics was recorded for 3 h while participants went about their usual academic activities within the university campus. Significantly greater degrees of cervical and upper thoracic flexion were adopted during phone use versus non-use time (p < 0.01). There were also significantly greater frequency of postural variations (zero crossing per min) in all spinal regions in the sagittal plane (all p < 0.05), and in some of the movements in transverse and frontal planes comparing phone use vs non-use. The postural variables also showed some significant correlations with self-reported pre-existing neck and upper back pain scores.

这项现场研究比较了大学生使用智能手机和不使用智能手机期间的实时脊柱运动和姿势变化。十名男性和八名女性（平均年龄21.5±2.6岁）参加了比赛，男女之间每天的电话使用时间相近。将五个惯性运动传感器连接到颈，胸和腰椎区域，并记录运动学3小时，同时参与者在大学校园内进行其通常的学术活动。与非使用时间相比，在电话使用过程中采用的颈椎和上胸屈曲度明显更高（p <0.01）。在矢状面的所有脊柱区域中，姿势变化的频率（每分钟零交叉）的频率也明显更高（所有p <0.05），并在横向和额面的某些运动中比较了电话使用与不使用。姿势变量还显示出与自我报告的先前存在的颈部和上背部疼痛评分的显着相关性。