The effects of smartphone use on upper extremity muscle activity and pain threshold

• Lee Minkyung

  Department of Rehabilitation Science, Graduate School of Inje University, Republic of Korea Ubiquitous Healthcare Research Center (u-HARC), Inje University, Republic of Korea Biohealth Products Research Center (BPRC), Inje University, Republic of Korea

• Hong Yunkyung

  Department of Rehabilitation Science, Graduate School of Inje University, Republic of Korea Ubiquitous Healthcare Research Center (u-HARC), Inje University, Republic of Korea Biohealth Products Research Center (BPRC), Inje University, Republic of Korea

• Lee Seunghoon

  Department of Rehabilitation Science, Graduate School of Inje University, Republic of Korea Ubiquitous Healthcare Research Center (u-HARC), Inje University, Republic of Korea Biohealth Products Research Center (BPRC), Inje University, Republic of Korea Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University: 197 Inje-ro, Gimhae, Gyeong-nam 621-749, Republic of Korea

• Won Jinyoung

  Department of Rehabilitation Science, Graduate School of Inje University, Republic of Korea Ubiquitous Healthcare Research Center (u-HARC), Inje University, Republic of Korea Biohealth Products Research Center (BPRC), Inje University, Republic of Korea

• Yang Jinjun

  Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University: 197 Inje-ro, Gimhae, Gyeong-nam 621-749, Republic of Korea

• Park Sookyoung

  Ubiquitous Healthcare Research Center (u-HARC), Inje University, Republic of Korea

• Chang Kyu-Tae

  National Primate Research Center (NPRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Republic of Korea

• Hong Yonggeun

  Department of Rehabilitation Science, Graduate School of Inje University, Republic of Korea Ubiquitous Healthcare Research Center (u-HARC), Inje University, Republic of Korea Biohealth Products Research Center (BPRC), Inje University, Republic of Korea Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University: 197 Inje-ro, Gimhae, Gyeong-nam 621-749, Republic of Korea

抄録

[Purpose] The purpose of this study was to determine whether muscle activity and pressure-induced pain in the upper extremities are affected by smartphone use, and to compare the effects of phone handling with one hand and with both hands. [Subjects] The study subjects were asymptomatic women 20–22 years of age. [Methods] The subjects sat in a chair with their feet on the floor and the elbow flexed, holding a smartphone positioned on the thigh. Subsequently, the subjects typed the Korean anthem for 3 min, one-handed or with both hands. Each subject repeated the task three times, with a 5-min rest period between tasks to minimize fatigue. Electromyography (EMG) was used to record the muscle activity of the upper trapezius (UT), extensor pollicis longus (EPL), and abductor pollicis (AP) during phone operation. We also used a dolorimeter to measure the pressure-induced pain threshold in the UT. [Results] We observed higher muscle activity in the UT, AP, and EPL in one-handed smartphone use than in its two-handed use. The pressure-induced pain threshold of the UT was lower after use of the smartphone, especially after one-handed use. [Conclusion] Our results show that smartphone operation with one hand caused greater UT pain and induced increased upper extremity muscle activity.

収録刊行物

• Ｊ　Ｐｈｙｓ　Ｔｈｅｒ　Ｓｃｉ

  Ｊ　Ｐｈｙｓ　Ｔｈｅｒ　Ｓｃｉ 27 (6), 1743-1745, 2015

  理学療法科学学会

キーワード

• VDT
• Smartphone
• Muscle pain

詳細情報

• CRID: 1390282679306622336
• NII論文ID: 130005086032
• DOI: 10.1589/jpts.27.1743
• ISSN: 21875626
• ISSN: 09155287
• Web Site: https://www.jstage.jst.go.jp/article/jpts/27/6/27_jpts-2015-015/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2016274398
• 本文言語コード: en
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