Lower trapezius muscle strength in individuals with unilateral neck pain.
ABSTRACT Descriptive and within-subject comparative study.
To examine lower trapezius muscle strength in individuals with unilateral neck pain.
Previous research has established the presence of reduced cervical flexor, extensor, and rotator muscle strength in individuals with neck pain. Some authors have suggested that individuals with neck pain have limited strength of the lower trapezius muscle, yet no research has investigated this claim.
Twenty-five individuals with unilateral neck pain participated in this study. Participants completed the Northwick Park Neck Pain Questionnaire (NPQ) as a measure of disability. Side of neck pain, duration of neck pain, and hand dominance were recorded. Lower trapezius muscle strength was assessed bilaterally in each participant, using a handheld dynamometer.
A significant difference in lower trapezius strength was found between sides (P<.001), with participants demonstrating an average of 3.9 N less force on the side of neck pain. The tested levels of association between NPQ score and percent strength deficit (r = -0.31, P = .13), and between symptom duration and percent strength deficit (r = -0.25, P = .22), were not statistically significant. No significant association was found between hand dominance and side of stronger lower trapezius (P = .59).
The results of this study demonstrate that individuals with unilateral neck pain exhibit significantly less lower trapezius strength on the side of neck pain compared to the contralateral side. This study suggests a possible association between lower trapezius muscle weakness and neck pain.
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ABSTRACT: SYNOPSIS: The biomechanical analysis of rehabilitation exercises has led to more scientifically based rehabilitation programs. Several investigators have sought to quantify the biomechanics and electromyographic data of common rehabilitation exercises in an attempt to fully understand their clinical indications and usefulness. Furthermore, the effect of pathology on normal shoulder biomechanics has been documented. It is important to consider the anatomical, biomechanical, and clinical implications when designing exercise programs. The purpose of this paper is to provide the clinician with a thorough overview of the availableliterature relevant to develop safe, effective, and appropriate exercise programs for injury rehabilitation and prevention of the glenohumeral and scapulothoracic joints. LEVEL OF EVIDENCE: Level 5.Journal of Orthopaedic and Sports Physical Therapy 03/2009; 39(2):105-17. DOI:10.2519/jospt.2009.2835 · 2.38 Impact Factor
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ABSTRACT: Introduction: Patients with neck pain often have subjective complaints of muscle stiffness, tension, or tightness in addition to their pain. It has been stated that in neck pain there is tightness of Upper Trapezius leading to weakness of Middle and Lower Trapezius, so this study compares the strength of Upper, Middle and Lower Trapezius muscle on the side of pain and the contralateral side. Method: The strength of Upper, Middle, and Lower Trapezius were assessed and compared on the side ipsilateral and contralateral to the pain in individuals with unilateral neck pain using Stabilizer Pressure bio feedback unit. Results: It has been shown that there is no significant difference in the strength of Upper Trapezius while there is a significant difference in the strength of Middle, And Lower Trapezius muscle on the side of pain and opposite side. Conclusion: The study supports that assessment and strengthening of Upper, Middle, and Lower Trapezius is necessary in individuals with unilateral neck pain. Copyright: © 2012 Choudhari R, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Spine 04/2012; 1(3). DOI:10.4172/2165-7939.1000115 · 2.45 Impact Factor
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ABSTRACT: Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 STUDY DESIGN: Descriptive, cross-sectional. OBJECTIVES: To compare static strength characteristics of the upper extremity musculature in female recreational tennis players who have lateral epicondylalgia with those of non-symptomatic tennis players and a control group of women who do not play tennis. BACKGROUND: A paucity of research exists describing the relationship between lateral epicondylalgia and strength characteristics of the upper extremity musculature despite the functional relationship that exists between the shoulder, elbow, and wrist. METHODS: Sixty-three females, 21 in each group, were recruited: symptomatic tennis players (STP) with lateral epicondylalgia, non-symptomatic tennis players (NSTP), and controls. Data collection was performed during a single session when strength of selected muscle groups of the dominant upper extremity was measured using a combination of force transducers. Strength ratios of selected muscle groups were calculated. RESULTS: The STP group reported median pain level of 3/10 on a numeric pain rating scale and 16 weeks symptom duration. The STP group had weaker lower trapezius (mean difference,-9.0 N; 95% CI: -13.5 to -4.4 N) and wrist extensors (-12.7 N; -24.4 to -1.1) strength and higher shoulder internal/external rotation (1.9; 0.02, 0.35) and upper/lower trapezius (1.32; 0.41, 2.23) strength ratios when compared to the NSTP group. Compared to the control group, the STP group demonstrated significantly higher shoulder internal/external rotation (0.21; 0.04, 0.38) and wrist flexion/extension (0.14; 0.01 to 0.27) strength ratios. CONCLUSIONS: In this group of recreational female tennis players, significant differences in strength and strength ratio characteristics were identified. While the design of the study precludes a cause and effect relationship to be established, the results suggest potential muscle groups of interest for further study or treatment. J Orthop Sports Phys Ther, Epub 5 September 2012. doi:10.2519/jospt.2012.4095.09/2012; 42(12). DOI:10.2519/jospt.2012.4095