The Immediate Effects of 975-nm GaAlAs Low-level Laser Therapy on Myofacial Triger Point of Upper Trapezius Muscle in Subjects with Rounded Shoulder Posture (둥근 어깨 자세를 가진 자의 등세모근 위 섬유의 압통점에 975-nm GaAlAs 저출력레이저 적용에 대한 즉각적인 효과)

Byung-Jo Kim (김병조); Lee Jung Hoon (이정훈)

The Immediate Effects of 975-nm GaAlAs Low-level Laser Therapy on Myofacial Triger Point of Upper Trapezius Muscle in Subjects with Rounded Shoulder Posture

Journal of the Korean Society of Physical Medicine
Abbr : J Korean Soc Phys Med
2014, 9(4), pp.433-438
Publisher : The Korean Society of Physical Medicine
Research Area : Medicine and Pharmacy > Physical Therapy > Other physical therapy

Byung-Jo Kim ¹, Lee Jung Hoon ¹

¹동의대학교

Candidate

ABSTRACT

Purpose: The purpose of our study was to compare a 975-nm, 500-mW GaAlAs low-level laser therapy versus placebo low-level laser therapy with regard to the immediate changes on the myofascial trigger point of the dominant upper trapezius muscle in subjects with rounded shoulder posture. Methods: Thirty-two male college students with rounded shoulder posture and shoulder pain consented to participate in the experiment. The subjects were randomly assigned to a 2-minute procedure with either an active GaAlAs low-level laser or a placebo GaAlAs low-level laser. The pressure-pain threshold and visual analog scale on tenderness at 3 kg were measured with an algometer before and after the laser treatments. Results: The active GaAlAs low-level laser group showed significant changes in pressure-pain threshold and visual analog scale on tenderness at 3 kg (p<0.05). The placebo GaAlAs low-level laser group showed no significant changes in either pressure-pain threshold or visual analog scale on tenderness at 3 kg (p>0.05). Conclusion: An immediate effect was observed in pressure-pain threshold and visual analog scale on tenderness at 3 kg following a 2-minute application (857.14 J/cm2) of a 975-nm, 500-mW GaAlAs low-level laser to the myofascial trigger point of the dominant upper trapezius muscle in patients with rounded shoulder posture.

KEYWORDS

GaAlAs laser, Low-level Laser Therapy, Visual analog scale

Citation status

* References for papers published after 2023 are currently being built.

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