Journal of Head Neck & Spine Surgery Juniper Publishers Author by:  Sabine Bauer Abstract With the increasing digitization at work and in the private sphere, the use of digital devices also on the rise. Particularly when using smart devices, the user unconsciously adopts a posture that deviates from a low-strain posture. The problem here is that daily use, in some cases over long periods of time, can lead to symptoms of overuse. In this study, the postural assessment of the upper-body is performed, and functional relationships between different postures are analyzed. To that end, the Craniovertebral Angle (CVA), the Head-Tilt Angle (HTA), the Forward-Shoulder Angle (FSA), and the Adjusted Head-Position Angle (AHPA) were markerless determined in 78 subjects. The volunteers were asked to perform four different body postures with the following conditions: an upright sitting position, with maximum head protraction, looking at a smartphone, and with maximum flexion of the hea...
 
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