Shoulder pain is directly associated with quality of life and functionality. Diagnostic accuracy is essential for fast and effective rehabilitation, in addition to determining the individual's functional classification and prognosis for treatment evolution. For this, it is fundamental to measure muscle strength, through reliable tools that allow evaluation and reassessment of deficits and progressive treatment behaviors. Muscular Manual Tests, frequently used in clinical examination, are not considered to be an effective method, being prone to failures, such as presenting differences in resistance applied by different therapists, and the difficult differentiation between patients with different degrees of muscular weakness. Other methods are cited in the literature as more effective in reducing the reliability failures of measures such as isokinetic dynamometry and hand held dynamometry. Manual dynamometry offers advantages such as the low cost of easy handling and the size of the instrument being portable. Therefore, the objective of this study will be to evaluate the strength of the muscles acting on the glenohumeral joint in patients with shoulder pain through manual dynamometry using Hand Held Lafayette " and to verify the intra- and inter-examiner reliability of the equipment, as well as Standard Measurement Error and Minimum Changeable Detection. Statistical analysis of the data obtained will be performed using the Statistical Package for the Social Sciences program (SPSS-20.0). The level of significance will be pd0.05. The expected result of the glenohumeral reliability analyzes is good to excellent for the movements of flexion, extension, abduction and internal and external rotations obtained through the Hand Held Lafayette " instrument. The expected result of the glenohumeral reliability analyzes is good to excellent for the movements of flexion, extension, abduction and internal and external rotations obtained through the Hand Held Lafayette " instrument.
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