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Influence of input device, work surface angle, and task on spine kinematics.

Maureen F Riddell, Kaitlin M Gallagher, Colin D McKinnon

    Work (Reading, Mass.)
    |January 7, 2017
    PubMed
    Summary

    Tablet use while working can impact spine posture. A 15° sloped desk reduces neck flexion, while data entry tasks increase it. Computer use leads to greater lumbar spine flexion than tablet use.

    Keywords:
    Sloping deskposturesit-stand chairstabletstask

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    Area of Science:

    • Ergonomics
    • Biomechanics
    • Occupational Health

    Background:

    • Increasing use of tablets in workplaces necessitates understanding their effect on spine posture.
    • Previous research has not fully quantified spine kinematics during tablet interaction.

    Purpose of the Study:

    • To quantitatively compare spine kinematics between tablet and desktop computer use.
    • To investigate the influence of different tasks and work surface angles on posture.

    Main Methods:

    • Fourteen participants' cervical and lumbar spine kinematics were analyzed using marker clusters and motion capture.
    • Median angles and range of motion were calculated from amplitude probability distribution functions.
    • Participants engaged in various tasks on a tablet and desktop computer for one hour.

    Main Results:

    • A 15° sloped desk significantly reduced cervical spine flexion compared to a flat surface.
    • Data entry tasks induced the highest degree of cervical flexion.
    • Device type and task interacted to influence relative lumbar spine angles, with increased lumbar flexion observed during computer use.

    Conclusions:

    • Workplace device choice (tablet vs. computer) affects lumbar spine posture.
    • Specific tasks significantly influence both cervical and lumbar spine posture.
    • Optimizing work surface angle, such as a 15° slope, can mitigate adverse cervical spine flexion.