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Effects of a Traction Device for Head Weight Reduction and Neutral Alignment during Sedentary Visual Display Terminal (VDT) Work on Postural Alignment, Muscle Properties, Hemodynamics, Preference, and Working Memory Performance

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  • Ju-Yeon Jung

    (Department of Health Science, Gachon University Graduate School, Gachon University, Incheon 21936, Korea)

  • Hwi-Young Cho

    (Department of Health Science, Gachon University Graduate School, Gachon University, Incheon 21936, Korea
    Department of Physical Therapy, College of Health Science, Gachon University, Incheon 21936, Korea)

  • Chang-Ki Kang

    (Department of Health Science, Gachon University Graduate School, Gachon University, Incheon 21936, Korea
    Neuroscience Research Institute, Gachon University, Incheon 21565, Korea
    Department of Radiological Science, College of Health Science, Gachon University, Incheon 21936, Korea)

Abstract

The forward head posture of visual display terminal (VDT) users induces various physical and cognitive clinical symptoms. However, few studies have been conducted to identify and solve problems associated with VDT posture. This study aimed to examine the adverse effects of VDT posture and the positive effects of traction-combined workstations by measuring postural alignment, muscle properties, blood velocity, preference, and working memory. Thirty-four healthy VDT users (18 males and 16 females aged 20–30 years) participated in the experiment at three workstations, including conventional (VDT_C), head support (VDT_S), and upright (VDT_U) workstations. They conducted 2-back working memory task. The craniovertebral angle (CVA), muscle tone and stiffness, blood velocity and visual analogue discomfort scale (VADS) were measured to examine the influence of workstations. VDT_C showed increased muscle tone or stiffness in the levator scapulae (LS), suboccipital muscle (SM), and sternocleidomastoid muscle (SCM) and an increased reaction time (RT) in working memory. However, VDT_S showed decreased stiffness and tone of SM and improved comfort. In addition, VDT_U showed decreased stiffness or tone of the LS and SCM and improved blood velocity and RT. In conclusion, maintaining neutral alignment significantly improved working memory performance, muscle properties, and blood velocity.

Suggested Citation

  • Ju-Yeon Jung & Hwi-Young Cho & Chang-Ki Kang, 2022. "Effects of a Traction Device for Head Weight Reduction and Neutral Alignment during Sedentary Visual Display Terminal (VDT) Work on Postural Alignment, Muscle Properties, Hemodynamics, Preference, and," IJERPH, MDPI, vol. 19(21), pages 1-12, October.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:21:p:14254-:d:959420
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    References listed on IDEAS

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    1. Ho-Jin Shin & Sung-Hyeon Kim & Suk-Chan Hahm & Hwi-Young Cho, 2020. "Thermotherapy Plus Neck Stabilization Exercise for Chronic Nonspecific Neck Pain in Elderly: A Single-Blinded Randomized Controlled Trial," IJERPH, MDPI, vol. 17(15), pages 1-12, August.
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