Fatigue-induced glenohumeral and scapulothoracic kinematic variability: Implications for subacromial space reduction

Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology
Jaclyn N Chopp-HurleyClark R Dickerson

Abstract

Superior humeral head translation and scapula reorientation can reduce the subacromial space. While these kinematic abnormalities exist in injured populations, the effect of muscle fatigue is unclear. Additionally, these mechanisms were typically studied independently, thereby neglecting potential covariance. This research evaluated the influence of upper extremity muscle fatigue on glenohumeral and scapulothoracic kinematics and defined their relationship. Radiography and motion tracking systems captured these kinematic relationships, during scapula plane elevation, both before and after fatigue. Fatigue-induced changes in humeral head position, scapular orientation and the minimum subacromial space width were measured. High inter-subject variability existed for each measure which precluded identification of mean differences at the population level. However, significant scapular upward rotation occurred following fatigue (p=0.0002). Despite similar population mean results, between 39% and 57% of participants exhibited fatigue-related changes in disadvantageous orientations. Additionally, correlations between measures were generally fair (0.21-0.40) and highly dependent on elevation, likely attributed to the variable fatigue re...Continue Reading

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Citations

Feb 10, 2016·Journal of Biomechanics·Jaclyn N Chopp-HurleyClark R Dickerson
Jan 23, 2016·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Clark R Dickerson, Andrea G Cutti
Oct 9, 2019·Journal of Sport Rehabilitation·Sebastian KlichAdam Kawczyński
May 7, 2020·Frontiers in Bioengineering and Biotechnology·Matteo ZagoNicola Lovecchio
Jul 22, 2019·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Sujata KhandareMeghan E Vidt
Nov 4, 2020·Journal of Biomechanics·Paola AdamoRoberto Gatti
Feb 23, 2021·Physical Therapy in Sport : Official Journal of the Association of Chartered Physiotherapists in Sports Medicine·Andrew PowellIan Horsley
Apr 4, 2021·International Journal of Environmental Research and Public Health·Sebastian KlichNicola Lovecchio
Oct 20, 2020·Journal of Shoulder and Elbow Surgery·Angela TateStephen J Thomas
Jul 3, 2021·International Journal of Environmental Research and Public Health·Denver M Y BrownSteven R Bray

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