Optimal foot-position of caregiver based on muscle activity of lower back and lower limb while providing sit-to-stand support
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- Kitagawa Kodai
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology: 2-4 Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka 808-0196, Japan
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- Nagasaki Takayuki
- Department of Rehabilitation, Faculty of Medical Science and Welfare, Tohoku Bunka Gakuen University, Japan
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- Nakano Sota
- Department of Rehabilitation, Kyushu University of Nursing and Social Welfare, Japan
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- Hida Mitsumasa
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology: 2-4 Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka 808-0196, Japan Department of Physical Therapy, Faculty of Rehabilitation, Osaka Kawasaki Rehabilitation University, Japan
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- Okamatsu Shogo
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology: 2-4 Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka 808-0196, Japan Department of Physical Therapy, Kitakyushu Rehabilitation College, Japan
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- Wada Chikamune
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology: 2-4 Hibikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka 808-0196, Japan
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説明
<p> [Purpose] In caregivers, low load posture is necessary to prevent lower back pain during patient handling activities such as sit-to-stand support. This study focused on the foot-position of caregivers as an adjustable and useful parameter. A wide stance decreases the stress on the lumbar vertebra. However, this foot-position increases loading of the spinae erector muscles. The aim of this study was to investigate the relationship of anterior-posterior and lateral-medial distances between feet and activity of the spinae erector muscles to determine the optimal foot-position for reducing stress on the lumbar vertebra without increasing spinae erector muscle load. [Participants and Methods] Five young male participants were asked to provide sit-to-stand support 10 times using nine normalized foot-positions with different anterior-posterior and lateral-medial distances. Surface electromyograms of the erector spinae and lower limb muscles were measured during sit-to-stand support. [Results] The results showed that the optimal foot-position (anterior-posterior 55%, lateral-medial 20% of body height) increased muscle activity within the lower limb muscles compared with the lower back muscles and did not increase loads on the erector spinae muscle. [Conclusion] Optimizing foot-position can reduce stress on the lumbar vertebra without increasing load on the spinae erector muscles.</p>
収録刊行物
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- Ｊ Ｐｈｙｓ Ｔｈｅｒ Ｓｃｉ
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Ｊ Ｐｈｙｓ Ｔｈｅｒ Ｓｃｉ 32 (8), 534-540, 2020
理学療法科学学会
