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KMID : 1101520210250030059
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Journal of Korean Society for Neurotherapy
2021 Volume.25 No. 3 p.59 ~ p.64
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Effects of the Use of Smartphone while Walking on the Trunk Muscle Activity in Young Students
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Lee Dae-Hee
Jeon Hye-Joo
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Abstract
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Purpose: The study aims to determine the effects of smartphone use on the trunk muscle activity while walking in young students.
Methods: Twentyone subjects were asked to perform 10meter walk test between upright walking without using a smartphone and conducting twohanded texting while walking with using a smartphone, and the electromyography activities of the trunk were quantified. When using a smartphone, cervical flexion angle was measured using the digital goniometer.
Results: First, middle trapezius, latissimus dorsi, and external abdominal oblique muscles decreased muscle activity when walking by texting to the smartphone than when walking without using the smartphone (p<0.05). The upper trapezius muscle activity increased when walking by sending text messages with a smartphone than when walking without using a smart phone (p<0.05). The splenius capitis, lower trapezius, triceps, multifidus, and erector spinae increased muscle activity when walking while texting to the smartphone than when walking without using a smartphone (p>0.05). Second, when using a smartphone, the speed was slower than upright walking (p<0.05). Third, when using a smartphone, the bending angle of the neck increased more than when upright walking (p<0.05).
Conclusion Our findings suggest that habitually using a smartphone while walking could be a potential risk for trunk musculoskeletal problems.
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KEYWORD
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Walking, Smartphone, Muscle activity, Trunk muscle, EMG
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