PNF and Movement

Korea Proprioceptive Neuromuscular Facilitation Association (대한고유수용성신경근촉진법학회)
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Changes in the Cervical and Lumber Flexion-Relaxation Ratio, Range of Motion, Pressure Pain Threshold, and Perceived Comfort Following the Wearing of a Trunk Brace during Smartphone Watching

스마트폰 시청 시 몸통 교정기 착용에 따른 목, 허리 굽힘-이완 비율, 관절가동범위, 압통, 착용감 변화

  • Park, Jin-Seong (Daonwellness Corporation) ;
  • Park, Du-Jin (Department of Physical Therapy, College of Health Sciences, Catholic University of Pusan)
  • 박진성 ((주) 다온웰니스) ;
  • 박두진 (부산가톨릭대학교 물리치료학과)
  • Received : 2021.11.25
  • Accepted : 2021.12.09
  • Published : 2021.12.31
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Abstract

Purpose: This study was conducted to investigate changes in the cervical and lumbar flexion-relaxation ratio, range of motion, pressure pain threshold, and perceived comfort following the wearing of a trunk brace during smartphone watching. Methods: To calculate the number of subjects for this study, an analysis with G*Power was performed at a statistical power of 0.8, an effect size of 0.5, and a significance level of 0.05, based on the results of a preliminary experiment on five subjects. In total, 27 adult men and women were recruited who had been informed of the study's purpose and process and had agreed to participate. All subjects watched content on a smartphone for 20 minutes in the same posture and conditions while wearing and not wearing a trunk brace, and then their cervical and lumbar flexion-relaxation ratio, range of motion, pressure pain threshold, and perceived comfort were measured. Results: Compared to the non-wearing of a trunk brace, the wearing of a trunk brace resulted in a statistically significant smaller decline in cervical extension and right-side cervical rotation (p<0.05). When the subjects wore a trunk brace, their right- and left-side cervical and right-side lumbar pressure pain statistically significantly improved when compared to not wearing a trunk brace (p<0.05). They also perceived a significantly lowered level of comfort 20 minutes after wearing a trunk brace compared to immediately after wearing it (p<0.05). Conclusion: The trunk brace was effective in reducing declines in right-side cervical rotation and the occurrence of left- and right-side cervical and right-side lumbar pressure pain. The findings indicate the need to improve the perceived comfort of trunk braces.

Keywords

Acknowledgement

이 논문은 2021년도 부산가톨릭대학교 교내연구비에 의하여 연구되었음.

References

  1. Andersen JH, Kaergaard A, Frost P, et al. Physical, psychosocial, and individual risk factors for neck/shoulder pain with pressure tenderness in the muscles among workers performing monotonous, repetitive work. Spine. 2002;27(6):660-667. https://doi.org/10.1097/00007632-200203150-00017
  2. Arguisuelas MD, Lison JF, Domenech-Fernandez J, et al. Effects of myofascial release in erector spinae myoelectric activity and lumbar spine kinematics in non-specific chronic low back pain: randomized controlled trial. Clinical Biomechanics. 2019;63:27-33. https://doi.org/10.1016/j.clinbiomech.2019.02.009
  3. Balaguier R, Madeleine P, Vuillerme N. Is one trial sufficient to obtain excellent pressure pain threshold reliability in the low back of asymptomatic individuals? A test-retest study. PLoS One. 2016;11(8):e0160866. https://doi.org/10.1371/journal.pone.0160866
  4. Clausen T. The sodium pump keeps us going. Annals of the New York Academy of Sciences. 2003;986:595-602. https://doi.org/10.1111/j.1749-6632.2003.tb07258.x
  5. Eitivipart AC, Viriyarojanakul S, Redhead L. Musculoskeletal disorder and pain associated with smartphone use: a systematic review of biomechanical evidence. Hong Kong Physiotherapy Journal. 2018;38(2):77-90. https://doi.org/10.1142/s1013702518300010
  6. Eom SH, Choi SY, Park DH. An empirical study on relationship between symptoms of musculoskeletal disorders and amount of smartphone usage. Journal of the Korea Safety Management and Science. 2013;15(2): 113-120. https://doi.org/10.12812/KSMS.2013.15.2.113
  7. Floyd WF, Silver PH. The function of erector spinae muscles in flexion of the trunk. Lancet. 1951;1(6647):133-134. https://doi.org/10.1016/S0140-6736(51)91212-3
  8. Hogarty DT, Hogarty JP, Hewitt AW. Smartphone use in ophthalmology: What is their place in clinical practice? Survey of Ophthalmology. 2020;65(2):250-262. https://doi.org/10.1016/j.survophthal.2019.09.001
  9. Horikawa M. Effect of visual display terminal height on the trapezius muscle hardness: quantitative evaluation by a newly developed muscle hardness meter. Applied Ergonomics. 2001;32(5):473-478. https://doi.org/10.1016/S0003-6870(01)00026-6
  10. International Telecommunication Union. Measuring the information society. Geneva. ITU Publications. 2012.
  11. Kim SH, Han SC, Monn JH. Study for range of motion, neck disability index according to cervical posture in adults with reduced cervical lordosis due to smartphone use. The Journal of the Korea Institute of Electronic Communication Sciences. 2017;12(4):679-690. https://doi.org/10.13067/JKIECS.2017.12.4.679
  12. Korpinen L, Paakkonen R, Gobba F. Self-reported neck symptoms and use of personal computers, laptops and cell phones among Finns aged 18-65. Ergonomics. 2013;56(7):1134-1146. https://doi.org/10.1080/00140139.2013.802018
  13. Lee HM, Park DJ, Kim SY. Immediate effects of dynamic neck training combined with the hold-relax technique for young college students with video display terminal syndrome. International Journal of Athletic Therapy and Training. 2016;21(1):50-55. https://doi.org/10.1123/ijatt.2015-0006
  14. Macintosh JE, Bogduk N. The attachments of the lumbar erector spinae. Spine. 1991;16(7):783-792. https://doi.org/10.1097/00007632-199107000-00017
  15. Meyer JJ, Berk RJ, Anderson AV. Recruitment patterns in the cervical paraspinal muscles during cervical forward flexion: evidence of cervical flexion-relaxation. Electromyography and Clinical Neurophysiology. 1993;33(4):217-223.
  16. Mohammad WS, Hamza HH, ElSais WM. Assessment of neck pain and cervical mobility among female computer workers at Hail University. International Journal of Occupational Safety and Ergonomics. 2015;21(1): 105-110. https://doi.org/10.1080/10803548.2015.1017952
  17. Namwongsa S, Puntumetakul R, Neubert MS, et al. Factors associated with neck disorders among university student smartphone users. Work. 2018;61(3):367-378. https://doi.org/10.3233/wor-182819
  18. Park DJ, Park SY. Long-term effects of diagonal active stretching versus static stretching for cervical neuromuscular dysfunction, disability and pain: An 8 weeks follow-up study. Journal of Back and Musculoskeletal Rehabilitation. 2019;32(3):403-410. https://doi.org/10.3233/bmr-171107
  19. Park SY, Park DJ. Changes of gait pattern, muscle activity, and perceived comfort in response to variations of height-elevating insoles in young adults. Journal of Exercise Rehabilitation. 2018;14(1):100-105. https://doi.org/10.12965/jer.1836026.013
  20. Patel RK, Sayers AE, Patrick NL, et al. A UK perspective on smartphone use amongst doctors within the surgical profession. Annals of Medicine and Surgery. 2015;4(2):107-112. https://doi.org/10.1016/j.amsu.2015.03.004
  21. Shin SJ, An DH, Oh JS, et al. Changes in pressure pain in the upper trapezius muscle, cervical range of motion, and the cervical flexion-relaxation ratio after overhead work. Industrial Health. 2012;50(6):509-515. https://doi.org/10.2486/indhealth.2012-0009
  22. Solomonow M, Baratta RV, Banks A, et al. Flexion-relaxation response to static lumbar flexion in males and females. Clinical Biomechanics. 2003;18(4):273-279. https://doi.org/10.1016/S0268-0033(03)00024-X
  23. Tunwattanapong P, Kongkasuwan R, Kuptniratsaikul V. The effectiveness of a neck and shoulder stretching exercise program among office workers with neck pain: a randomized controlled trial. Clinical Rehabilitation. 2016;30(1):64-72. https://doi.org/10.1177/0269215515575747
  24. Vahedi Z, Mazloumi A, Sharifnezhad A, et al. Head forward flexion, lateral bending and viewing distance in smartphone users: a comparison between sitting and standing postures. Work. 2020;67(4):837-846. https://doi.org/10.3233/wor-203303
  25. Wu B, Yuan H, Geng D, et al. The impact of a stabilization exercise on neck pain: a systematic review and meta-analysis. Journal of Neurological Surgery. 2020;81(4):342-347.
  26. Yoo WG, An DH. The relationship between the active cervical range of motion and changes in head and neck posture after continuous VDT work. Industrial Health. 2009;47(2):183-188. https://doi.org/10.2486/indhealth.47.183
  27. Yung-Hui L, Wei-Hsien H. Effects of shoe inserts and heel height on foot pressure, impact force, and perceived comfort during walking. Applied Ergonomics. 2005;36(3):355-362. https://doi.org/10.1016/j.apergo.2004.11.001