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Journal articles on the topic 'Shoulder muscle'

Author: Grafiati

Published: 10 January 2023

Last updated: 31 July 2025

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1

Bhawna, N. K. Multani, and Zile Singh Kundu. "SHOULDER MUSCLE STRENGTH IN ADULTS WITH AND WITHOUT SHOULDER PAIN." International Journal of Physiotherapy and Research 4, no. 4 (2016): 1616–21. http://dx.doi.org/10.16965/ijpr.2016.149.

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Muething, Alyssa, Shellie Acocello, Kimberly A. Pritchard, Stephen F. Brockmeier, Susan A. Saliba, and Joseph M. Hart. "Shoulder-Muscle Activation in Individuals With Previous Shoulder Injuries." Journal of Sport Rehabilitation 24, no. 3 (2015): 278–85. http://dx.doi.org/10.1123/jsr.2014-0160.

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Context:Understanding how muscles activate in a population with a previous glenohumeral-joint (GH) injury may help clinicians understand how to build a conservative treatment plan to strengthen or activate the specific muscles in an attempt to reduce recurrent shoulder injury and development of GH laxity.Objective:To investigate muscle-activation differences between the previously injured limb of individuals with a history of GH-joint injury and healthy matched controls during functional isometric contractions.Design:Case control.Setting:University research laboratory.Participants:17 individua

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3

Jacob, J., P. O'Connor, and B. Pass. "Muscle Injury Around the Shoulder." Seminars in Musculoskeletal Radiology 26, no. 05 (2022): 535–45. http://dx.doi.org/10.1055/s-0042-1756687.

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AbstractAcute shoulder tendon and intra-articular injuries are common and their imaging well described. However, a subset of patients present with more unusual acute shoulder muscle injury. Of these, pectoralis major muscle injuries are encountered the most often and are increasingly prevalent due to a focus on personal fitness, particularly bench-press exercises. Other muscle injuries around the shoulder are rare. This article reviews the anatomy, mechanism of injury, and the imaging findings in relation to injuries of these muscles around the shoulder. We focus on pectoralis major injury but

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Melnyk, O. O., та M. V. Melnyk. "Біоморфологічні особливості м’язів, діючих на плечовий суглоб, деяких представників ряду горобцеподібних – Ordо Passeriformes". Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 19, № 77 (2017): 55–59. http://dx.doi.org/10.15421/nvlvet7713.

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Biomorphological features of muscles that act on the shoulder joint of some representatives of orderPasseriformes are represented in the article. As shoulder joint of birds has many axes, not only the muscles of the shoulder joint provide the movements in it, but some of the muscles of the shoulder girdle and elbow joint. It should be noted that the main flight muscles of birds are the shoulder girdle muscles, including the chest (m. pectoralis) and supra-coracoid muscles. Some muscles of an elbow joint, including m. coracoradialis and m. scapuli triceps, are equally important. However, the am

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Moeller, Chad R., Kellie C. Huxel Bliven, and Alison R. Snyder Valier. "Scapular Muscle-Activation Ratios in Patients With Shoulder Injuries During Functional Shoulder Exercises." Journal of Athletic Training 49, no. 3 (2014): 345–55. http://dx.doi.org/10.4085/1062-6050-49.3.10.

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Context: Alterations in scapular muscle activation, which are common with glenohumeral (GH) injuries, affect stability and function. Rehabilitation aims to reestablish activation between muscles for stability by progressing to whole-body movements. Objective: To determine scapular muscle-activation ratios and individual muscle activity (upper trapezius [UT], middle trapezius [MT], lower trapezius [LT], serratus anterior [SA]) differences between participants with GH injuries and healthy control participants during functional rehabilitation exercises. Design: Cross-sectional study. Setting: Lab

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6

Chang, Hsiao-Yun, Chen-Sheng Chen, Shun-Hwa Wei, and Chi-Huang Huang. "Recovery of Joint Position Sense in the Shoulder after Muscle Fatigue." Journal of Sport Rehabilitation 15, no. 4 (2006): 312–25. http://dx.doi.org/10.1123/jsr.15.4.312.

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Context:Fatigue of the shoulder rotator muscles may negatively affect joint position sense (JPS) and ultimately lead to injury.Objective:Recovery of shoulder JPS after muscle fatigue.Design:A repeated-measures study.Setting:Musculoskeletal research laboratory.Patients:Thirteen subjects participated in joint position error tests and isokinetic concentric strength assessment in shoulder rotation, before and after rotator muscle fatigue.Interventions:Local muscle fatigue was induced using isokinetic concentric contractions of the shoulder rotator muscles.Main Outcome Measurements:Shoulder rotator

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Bolton, G., SJ Moss, M. Sparks, and PC Venter. "Thoracic posture, shoulder muscle activation patterns and isokinetic strength of semi-professional rugby union players." South African Journal of Sports Medicine 25, no. 1 (2013): 12. http://dx.doi.org/10.17159/2413-3108/2013/v25i1a386.

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Background. Shoulder injuries are the most severe injuries in rugby union players, accounting for almost 20% of injuries related to the sport and resulting in lost playing hours.Objective. To profile the thoracic posture, scapular muscle activation patterns and rotator cuff muscle isokinetic strength of semi-professionalrugby union players.Methods. Using the hand-behind-the-neck and -back methods, we manually tested the range of motion (ROM) of the shoulder joints of 91 uninjured semi-professional rugby union players who consented to participate in the study. Profiling and classification of th

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Bolton, G., SJ Moss, M. Sparks, and PC Venter. "Thoracic posture, shoulder muscle activation patterns and isokinetic strength of semi-professional rugby union players." South African Journal of Sports Medicine 25, no. 1 (2013): 12. http://dx.doi.org/10.17159/2078-516x/2013/v25i1a386.

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Background. Shoulder injuries are the most severe injuries in rugby union players, accounting for almost 20% of injuries related to the sport and resulting in lost playing hours.Objective. To profile the thoracic posture, scapular muscle activation patterns and rotator cuff muscle isokinetic strength of semi-professionalrugby union players.Methods. Using the hand-behind-the-neck and -back methods, we manually tested the range of motion (ROM) of the shoulder joints of 91 uninjured semi-professional rugby union players who consented to participate in the study. Profiling and classification of th

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9

Broström LA, Kronberg M. "The effect of shoulder muscle training in patients with recurrent shoulder dislocations." Journal of Rehabilitation Medicine 24, no. 1 (1992): 11–15. http://dx.doi.org/10.2340/16501977921115.

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Thirty-three shoulders in 29 patients with recurrent shoulder dislocations, of both traumatic and nontraumatic type, have been studied. The patients suffered from muscle weakness, and had also a hypotrophy of the supra- and infraspinatus muscles. A special training program using an isokinetic pulley-weight apparatus, for muscle strength, coordination and endurance training of the rotator-cuff muscles and the deltoid were given all patients. Shoulder flexors, internal and external rotator muscles were trained three times a week, during a period of 8 weeks. At follow-up one year after completion

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Broström, LA, M. Kronberg, G. Németh, and U. Oxelbäck. "The effect of shoulder muscle training in patients with recurrent shoulder dislocations." Journal of Rehabilitation Medicine 24, no. 1 (2020): 11–15. http://dx.doi.org/10.2340/1650197792241115.

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Thirty-three shoulders in 29 patients with recurrent shoulder dislocations, of both traumatic and nontraumatic type, have been studied. The patients suffered from muscle weakness, and had also a hypotrophy of the supra- and infraspinatus muscles. A special training program using an isokinetic pulley-weight apparatus, for muscle strength, coordination and endurance training of the rotator-cuff muscles and the deltoid were given all patients. Shoulder flexors, internal and external rotator muscles were trained three times a week, during a period of 8 weeks. At follow-up one year after completion

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11

Parry, Joseph S., Rachel Straub, and Daniel J. Cipriani. "Shoulder- and Back-Muscle Activation During Shoulder Abduction and Flexion Using a Bodyblade Pro Versus Dumbbells." Journal of Sport Rehabilitation 21, no. 3 (2012): 266–72. http://dx.doi.org/10.1123/jsr.21.3.266.

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Context:The Bodyblade Pro is used for shoulder rehabilitation after injury. Resistance is provided by blade oscillations—faster oscillations or higher speeds correspond to greater resistance. However, research supporting the Bodyblade Pro’s use is scarce, particularly in comparison with dumbbell training.Objective:To compare muscle activity, using electromyography (EMG), in the back and shoulder regions during shoulder exercises with the Bodyblade Pro vs dumbbells.Design:Randomized crossover study.Setting:San Diego State University biomechanics laboratory.Participants:11 healthy male subjects

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Sawada, Tomonori, Hiroki Okawara, Daisuke Nakashima, et al. "Reliability of Trapezius Muscle Hardness Measurement: A Comparison between Portable Muscle Hardness Meter and Ultrasound Strain Elastography." Sensors 20, no. 24 (2020): 7200. http://dx.doi.org/10.3390/s20247200.

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Prolonged computer work and smartphone use can cause stiffness of the neck and shoulder muscles, including the trapezius muscle. Hence, muscle hardness quantification is clinically beneficial. The present study aimed to examine the reliability of trapezius muscle hardness measurement using a portable muscle hardness meter and ultrasound strain elastography. Overall, 20 healthy young men participated in this study. Prior to measurement, the participant’s subjective symptoms, particularly shoulder muscle stiffness, were rated using an 11-point verbal scale. Furthermore, hardness of the right and

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13

Aghazadeh, Fereydoun, Mohamed Mokrani, Saif Al-Qaisi, Laura Ikuma, and Marwa Hassan. "Effect of overhead lifting on neck and shoulder muscle activity and upper extremity joint angles." Occupational Ergonomics 10, no. 4 (2012): 165–74. http://dx.doi.org/10.3233/oer-2012-0200.

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The purpose of this study was to determine the effects of varying amount of lifted weight on upper extremity joint angles and muscle activity of the neck and shoulder. Two-dimensional elbow and shoulder kinematics of overhead lifting were determined, and simultaneously surface electromyographic (EMG) data from the upper trapezius and sternocleidomastoid muscles were collected. Results show that as lifted weight increased, the EMG activity of both muscles increased accordingly. Increasing the weight also resulted in increased maximum elbow joint angle and decreased maximum shoulder joint angle,

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14

Belli, Italo, Sagar Joshi, J. Micah Prendergast, et al. "Does enforcing glenohumeral joint stability matter? A new rapid muscle redundancy solver highlights the importance of non-superficial shoulder muscles." PLOS ONE 18, no. 11 (2023): e0295003. http://dx.doi.org/10.1371/journal.pone.0295003.

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The complexity of the human shoulder girdle enables the large mobility of the upper extremity, but also introduces instability of the glenohumeral (GH) joint. Shoulder movements are generated by coordinating large superficial and deeper stabilizing muscles spanning numerous degrees-of-freedom. How shoulder muscles are coordinated to stabilize the movement of the GH joint remains widely unknown. Musculoskeletal simulations are powerful tools to gain insights into the actions of individual muscles and particularly of those that are difficult to measure. In this study, we analyze how enforcement

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15

de Castro, Marcelo Peduzzi, Daniel Cury Ribeiro, Felipe de Camargo Forte, Joelly Mahnic de Toledo, Roberto Costa Krug, and Jefferson Fagundes Loss. "Estimated Force and Moment of Shoulder External Rotation Muscles: Differences Between Transverse and Sagittal Planes." Journal of Applied Biomechanics 28, no. 6 (2012): 701–7. http://dx.doi.org/10.1123/jab.28.6.701.

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The aim of this study was to compare shoulder muscle force and moment production during external rotation performed in the transverse and sagittal planes. An optimization model was used for estimating shoulder muscle force production of infraspinatus, teres minor, supraspinatus, anterior deltoid, middle deltoid and posterior deltoid muscles. The model uses as input data the external rotation moment, muscle moment arm magnitude, muscle physiologic cross-sectional area and muscle specific tension. The external rotation moment data were gathered from eight subjects in transverse and six subjects

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Mun, Woo-Lim, Eui-Young Jung, Shi Lei, and Su-Yeon Roh. "Scapular Muscle Activation at Different Shoulder Abduction Angles During Pilates Reformer Arm Work Exercise." Medicina 61, no. 4 (2025): 645. https://doi.org/10.3390/medicina61040645.

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Background and Objectives: Scapular muscles are crucial in controlling scapular movement, ensuring proper alignment, and preventing injuries during shoulder joint motion. The shoulder abduction angle is one of the most important factors when performing exercises to improve scapular movement control. The Pilates reformer arm work (AW) movement can be performed with different shoulder abduction angles. Therefore, this study analyzed the differences in scapular muscle activation depending on the shoulder abduction angle during the AW movement. Materials and Methods: Twenty-six healthy adult males

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17

Kravchenko, D. D., O. S. Strafun, V. L. Suvorov, O. D. Karpinska, and M. Yu Karpinsky. "Modeling muscle work during upper limb flexion in the shoulder joint." TRAUMA 26, no. 3 (2025): 136–46. https://doi.org/10.22141/1608-1706.3.26.2025.1014.

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Background. The endoprosthetic procedure is often used for fractures or massive ruptures of the rotator cuff muscles, when conservative treatment is ineffective. In cases where it is impossible to use anatomical shoulder replacement, reversible arthroplasty is widely used. When replacing the shoulder joint, it is important to consider the contribution of the muscles responsible for flexion and abduction of the shoulder, since their function significantly affects the stability of the prosthesis, range of motion and overall recovery efficiency. Objective: to assess the force contribution of indi

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18

Henry, Timothy J., Scott M. Lephart, Jorge Giraldo, David Stone, and Freddie H. Fu. "The Effect of Muscle Fatigue on Muscle Force-Couple Activation of the Shoulder." Journal of Sport Rehabilitation 10, no. 4 (2001): 246–56. http://dx.doi.org/10.1123/jsr.10.4.246.

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Context:Muscle fatigue is an important concept in regard to the muscle function of the shoulder joint. Its effect on the muscle force couples of the glenohumeral joint has not been fully identified.Objective:To examine the effects of muscle fatigue on muscle force-couple activation in the normal shoulder.Design:Pretest, posttest.Patients:Ten male subjects, age 18–30 years, with no previous history of shoulder problems.Main Outcome Measures:EMG (area) values were assessed for the anterior and middle deltoid, subscapularis, and infraspinatus muscles during 4 dynamic stabilizing exercises before

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19

Nie, Hongling, Adam Kawczynski, Pascal Madeleine, and Lars Arendt-Nielsen. "Delayed onset muscle soreness in neck/shoulder muscles." European Journal of Pain 9, no. 6 (2005): 653. http://dx.doi.org/10.1016/j.ejpain.2004.12.009.

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20

Widyaningrum, Ni Luh Gadung, Adnan Faris Naufal, and Elif Nur Efendi. "Physiotherapy Management of Frozen Shoulder Dextra E.C Dextra Shoulder Osteoarthritis Case." FISIO MU: Physiotherapy Evidences 4, no. 3 (2023): 133–39. http://dx.doi.org/10.23917/fisiomu.v4i3.21968.

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Frozen Shoulder (FS) is a common shoulder disorder characterized by a gradual increase in pain that is direct and limited. Movement of the glenohumeral joint ranges of motion. The pathophysiology of frozen shoulder is relatively clear as a pathological process. The study used a case report study conducted at the Praktik Mandiri Fisioterapi Magetan. The cause of Frozen Shoulder is still unknown, but there are other factors that trigger the occurrence of frozen shoulder including postoperative fractures resulting in limited movement of the shoulder, certain diseases, injuries to surrounding musc

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Kim, Hyun Tae, and Seok Won Chung. "Nonoperative treatment of shoulder pain." Journal of the Korean Medical Association 65, no. 11 (2022): 699–708. http://dx.doi.org/10.5124/jkma.2022.65.11.699.

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Background: The shoulder joint has a wide range of motion and is extensively used. Damage in its components may cause functional deficits and pain. In particular, shoulder joint pain is associated with discomfort due to the involvement of the joint’s movement in basic tasks of daily life, such as washing one’s hair, dressing, and eating.Current Concepts: Diseases that cause shoulder joint pain include shoulder impingement syndrome, rotator cuff tear and tendinopathy, lesion of superior labrum anterior to posterior, biceps tendinitis, adhesive capsulitis, calcific tendinitis, and shoulder insta

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Siraj Mansuri Paras, Samiha. "Effect of Muscle Energy Technique on Pectoral Muscles as an Adjunct Therapy in Frozen Shoulder Patients." International Journal of Science and Research (IJSR) 12, no. 4 (2023): 457–60. http://dx.doi.org/10.21275/sr23401202541.

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23

Kok, Laura M., Jim Schrijvers, Marta Fiocco, Barend van Royen, and Jaap Harlaar. "Use of a Shoulder Rest for Playing the Violin Revisited: An Analysis of the Effect of Shoulder Rest Height on Muscle Activity, Violin Fixation Force, and Player Comfort." Medical Problems of Performing Artists 34, no. 1 (2019): 39–46. http://dx.doi.org/10.21091/mppa.2019.1009.

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AIMS: For violinists, the shoulder rest is an ergonomic adaptation to reduce musculoskeletal load. In this study, we aimed to evaluate how the height of the shoulder rest affects the violin fixation force and electromyographic (EMG) activity of the superficial neck and shoulder muscles. METHODS: In professional violinists, four different shoulder rest heights during five playing conditions were evaluated. Outcome variables included the jaw-shoulder violin fixation force and bilateral surface EMG of the upper trapezius (mTP), sternocleidomastoid (mSCM), and left anterior part of the left deltoi

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Lee, Jung-Ho. "The Effect of Shoulder Joint Adductor Muscle Strengthening Exercise on the Muscle Strength Improvement of the Shoulder Muscles." Journal of the Korea Academia-Industrial cooperation Society 24, no. 6 (2023): 274–80. http://dx.doi.org/10.5762/kais.2023.24.6.274.

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Strafun, S. S., V. V. Gaiovych, O. S. Strafun, S. V. Bogdan, and D. D. Kravchenko. "Pecularities of shoulder joint arthroplasty after war injuries." PAIN, JOINTS, SPINE 15, no. 1 (2025): 1–5. https://doi.org/10.22141/pjs.15.1.2025.448.

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Background. Shoulder arthroplasty in patients after combat injuries is a complex and multicomponent problem. This study aimed to analyze our first experience of treating patients with gunshot and blast injuries with shoulder arthroplasty. Materials and methods. We observed 14 patients with the consequences of severe polystructural injuries of the shoulder joint due to shrapnel (12 subjects) and bullet (2 patients). Results. Shoulder joint arthroplasty was performed in 4 to 20 months after gunshot or blast injury (on average 9.4 months). A reverse shoulder arthroplasty was performed when only

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Kubota, Atsushi, Chiho Takayanagi, and Kohei Kishimoto. "Shoulder muscle weakness effects on muscle hardness around the shoulder joint and scapulae." Journal of Sports Medicine and Therapy 5, no. 1 (2020): 001–7. http://dx.doi.org/10.29328/journal.jsmt.1001049.

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27

Guney-Deniz, Hande, Gulcan Harput, Ugur Toprak, and Irem Duzgun. "Relationship Between Middle Trapezius Muscle Activation and Acromiohumeral Distance Change During Shoulder Elevation With Scapular Retraction." Journal of Sport Rehabilitation 28, no. 3 (2019): 266–71. http://dx.doi.org/10.1123/jsr.2018-0131.

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Context:The scapular retraction exercises are widely used among clinicians to balance the activity of the scapular muscles as well as the rotator cuff muscles in different shoulder abduction positions.Objectives:The aim of this study was to investigate the relationship between scapular (middle and upper trapezius) and shoulder muscles (middle deltoid and infraspinatus) activation level differences and acromiohumeral distance changes during shoulder abduction with scapular retraction.Design:Cross-sectional study.Setting:University research laboratory.Participants:Nineteen asymptomatic individua

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Scott, Ramonica, Hyung Suk Yang, C. Roger James, Steven F. Sawyer, and Phillip S. Sizer. "Volitional Preemptive Abdominal Contraction and Upper Extremity Muscle Latencies During D1 Flexion and Scaption Shoulder Exercises." Journal of Athletic Training 53, no. 12 (2018): 1181–89. http://dx.doi.org/10.4085/1062-6050-255-17.

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Context The abdominal-bracing maneuver, a volitional preemptive abdominal contraction (VPAC) strategy, is commonly used during resisted shoulder exercises. How VPAC affects shoulder-muscle function during resisted shoulder exercise is unknown. Objective To identify the effects of VPAC on selected parascapular and glenohumeral muscles during specific shoulder exercises with or without resistance. Design Cross-sectional study. Setting Clinical biomechanics research laboratory. Patients or Other Participants Twenty-two asymptomatic volunteers between 18 and 40 years of age. Intervention(s) Partic

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Goswami, Mithlesh, Rajeshwari Jindal, Om Prakash, Rajesh K. Jharwal, and Kusum Gaur. "Shoulder Subluxation and its Associated Risk Factors in Post Stroke Hemiplegic Patients." International Journal of Pharmaceutical and Clinical Research 14, no. 12 (2022): 1039–45. https://doi.org/10.5281/zenodo.13225737.

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<strong>Objectives:</strong> Stroke is one of the leading causes of death or disability in India. One of the major sequale of the stroke is glenohumeral subluxation (GHS). This study was conducted to find out the prevalence of shoulder subluxation and its associating risk factors in post stroke hemiplegic patients. <strong>Material and Method:</strong> This descriptive study of post-stroke hemiplegic patients was conducted in the department of PMR, SMS Medical College, Jaipur, from December 2019 to September 2020. A plan radiograph (AP view) of the bilateral shoulder was taken i

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Tamura, Yuki, Noriaki Maeda, Makoto Komiya, et al. "Muscle Synergy of the Periarticularis Shoulder Muscles during a Wheelchair Propulsion Motion for Wheelchair Basketball." Applied Sciences 14, no. 20 (2024): 9292. http://dx.doi.org/10.3390/app14209292.

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Wheelchair basketball players often develop shoulder pain due to repetitive wheelchair propulsion motion. Wheelchair propulsion involves two phases, push and recovery, with several different muscles simultaneously active in each phase. Although differences in the coordinated activity of multiple muscles may influence the mechanism of injury occurrence, there have been no studies investigating muscle synergy in wheelchair propulsion motion. Twelve healthy adult males with no previous wheelchair driving experience were included. The surface electromyography data of 10 muscles involved in shoulde

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Taghizadeh, Elham, Oskar Truffer, Fabio Becce, et al. "Deep learning for the rapid automatic quantification and characterization of rotator cuff muscle degeneration from shoulder CT datasets." European Radiology 31, no. 1 (2020): 181–90. http://dx.doi.org/10.1007/s00330-020-07070-7.

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Abstract Objectives This study aimed at developing a convolutional neural network (CNN) able to automatically quantify and characterize the level of degeneration of rotator cuff (RC) muscles from shoulder CT images including muscle atrophy and fatty infiltration. Methods One hundred three shoulder CT scans from 95 patients with primary glenohumeral osteoarthritis undergoing anatomical total shoulder arthroplasty were retrospectively retrieved. Three independent radiologists manually segmented the premorbid boundaries of all four RC muscles on standardized sagittal-oblique CT sections. This pre

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Melnyk, O. O., та M. V. Melnyk. "Біоморфологія м’язів, діючих на плечовий суглоб чорнодзьобої гагари". Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 19, № 82 (2017): 120–24. http://dx.doi.org/10.15421/nvlvet8225.

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The article presents the results of studies of the biomorphological features of muscles acting on shoulder joint of some representatives of order Gaviiformes. Shoulder joint is a multifaceted joint, movements of which are provided not only by the muscles of the shoulder joint itself, but also some muscles of the shoulder girdle and elbow joint. It should be noted that the main muscles of the flight of birds are muscles of the shoulder girdle, in particular: thoracic and m. supracoracoideus. Also important are some of the muscles of the elbow, in particularm.coraco-radialis and m. scapula-trice

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Michener, Lori A., N. Douglas Boardman, Peter E. Pidcoe, and Angela M. Frith. "Scapular Muscle Tests in Subjects With Shoulder Pain and Functional Loss: Reliability and Construct Validity." Physical Therapy 85, no. 11 (2005): 1128–38. http://dx.doi.org/10.1093/ptj/85.11.1128.

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Abstract Background and Purpose. Scapular muscle performance evaluated with a handheld dynamometer (HHD) has been investigated only in people without shoulder dysfunction for test-retest reliability of data obtained with a single scapular muscle test. The purpose of this study was to assess the reliability, error, and validity of data obtained with an HHD for 4 scapular muscle tests in subjects with shoulder pain and functional loss. Subjects and Methods. Subjects (N=40) with shoulder pain and functional loss were tested bymeasuring the kilograms applied with an HHD during 3 trials for muscle

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Hardie, Rebecca, Rachel Haskew, Joel Harris, and Gerwyn Hughes. "The Effects of Bag Style on Muscle Activity of the Trapezius, Erector Spinae and Latissimus Dorsi During Walking in Female University Students." Journal of Human Kinetics 45, no. 1 (2015): 39–47. http://dx.doi.org/10.1515/hukin-2015-0005.

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Abstract Back pain is common in adolescents which has been associated with carrying a bag. However, there is little research examining the effects of bag style in female adolescents. The aim of the study was to investigate the effects of different bag conditions on muscle activity of the trapezius, erector spinae and latissimus dorsi muscles in female university students during walking. Twelve female university students walked on a treadmill for 5 minutes at 1.1 m/s during five conditions; control, 1 strapped rucksack, 2 strapped rucksack, ipsilateral shoulder strap and contralateral shoulder

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Madsen, Bjarne K., Karen Søgaard, Lars L. Andersen, Jørgen H. Skotte, and Rigmor H. Jensen. "Neck and shoulder muscle strength in patients with tension-type headache: A case-control study." Cephalalgia 36, no. 1 (2015): 29–36. http://dx.doi.org/10.1177/0333102415576726.

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Introduction Tension-type headache (TTH) is highly prevalent in the general population, and it is characterized by increased muscle tenderness with increasing headache frequency and intensity. Aim The aim of this case-control study was to compare muscle strength in neck and shoulder muscles in TTH patients and healthy controls by examining maximal voluntary isometric contraction (MVC) during shoulder abduction, neck flexion and extension as well as the extension/flexion strength ratio of the neck. Methods Sixty TTH patients and 30 sex- and age-matched healthy controls were included. Patients w

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Verjans, Mark, Nad Siroros, Jörg Eschweiler, and Klaus Radermacher. "Technical concept and evaluation of a novel shoulder simulator with adaptive muscle force generation and free motion." Current Directions in Biomedical Engineering 2, no. 1 (2016): 61–65. http://dx.doi.org/10.1515/cdbme-2016-0017.

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AbstractThe human shoulder is one of the most complex joints of the human body, and due to the high range of motion and the complex soft tissue apparatus prone to injuries. Surgical therapies and joint replacements often lead to unsatisfactory results. To improve the understanding of the complex biomechanics of the shoulder, experimental investigations have to be conducted. For this purpose a new shoulder simulator with an innovative muscle force generation was developed. On the basis of a modular concept six artificial pneumatic muscles were integrated to represent the functionally most impor

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Song, Zhibin, Chao Nie, Shuyang Li, Paolo Dario, and Jian S. Dai. "A Muscle-Specific Rehabilitation Training Method Based on Muscle Activation and the Optimal Load Orientation Concept." Applied Bionics and Biomechanics 2018 (November 22, 2018): 1–13. http://dx.doi.org/10.1155/2018/2365983.

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Training based on muscle-oriented repetitive movements has been shown to be beneficial for the improvement of movement abilities in human limbs in relation to fitness, athletic training, and rehabilitation training. In this paper, a muscle-specific rehabilitation training method based on the optimal load orientation concept (OLOC) was proposed for patients whose motor neurons are injured, but whose muscles and tendons are intact, to implement high-efficiency resistance training for the shoulder muscles, which is one of the most complex joints in the human body. A three-dimensional musculoskele

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Saarkoppel, Lyudmila, Anastasiya Shhetinina, Galina Lagutina, et al. "P-611 OCCUPATIONAL SHOULDER LESIONS ASSOCIATED WITH FORCEFUL EXERTIONS." Occupational Medicine 74, Supplement_1 (2024): 0. http://dx.doi.org/10.1093/occmed/kqae023.1444.

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Abstract Introduction Among the occupational musculoskeletal disorders registered in the Russian Federation shoulder lesions associated with forceful exertions deserve special attention. Diagnosis of these diseases is a significant problem for occupational medicine specialists, which determines the extremely low detectability of this pathology. Material and Methods Neuro-orthopedic examination and ultrasound examination of 170 underground miners, whose work activity is associated with physical overloads of the shoulder girdle and arms, were carried out. Results and Conclusions Neuro-orthopedic

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BERTHONNAUD, ERIC, MELISSA MORROW, GUILLAUME HERZBERG, KAI-NAN AN, and JOANNES DIMNET. "BIOMECHANICAL MODEL PREDICTING VALUES OF MUSCLE FORCES IN THE SHOULDER GIRDLE DURING ARM ELEVATION." Journal of Mechanics in Medicine and Biology 10, no. 04 (2010): 643–66. http://dx.doi.org/10.1142/s0219519410003629.

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A three-dimensional (3D) geometric model for predicting muscle forces in the shoulder complex is proposed. The model was applied throughout the range of arm elevation in the scapular plan. In vitro testing has been performed on 13 cadaveric shoulders. The objectives were to determine homogeneous values of physiological parameters of shoulder muscles and to locate sites of muscular attachment to any bone of the shoulder complex. Muscular fiber lengths, lengths of contractile element (CE), and muscle volumes were measured, corresponding physiological cross-sectional area (PCSA) were calculated,

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Kim, Ye Ji, Seojae Jeon, Hyeonjun Woo, Won-Bae Ha, and Junghan Lee. "A protocol for a systematic review and meta-analysis of the effect of muscle energy techniques on shoulder joint pain." PLOS ONE 20, no. 4 (2025): e0321176. https://doi.org/10.1371/journal.pone.0321176.

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Introduction Muscle energy techniques (MET) for shoulder muscles improve both shoulder muscle tension and the range of motion of the glenohumeral joint. This systematic literature review will investigate the effects of MET on shoulder pain as a result of muscle tension in the glenohumeral joints of patients with shoulder disorders and collect clinical evidence regarding the effectiveness of muscle energy techniques on glenohumeral joint pain. Based on previous studies, we anticipate that MET may significantly affect shoulder joint pain. We expect to provide moderate to high levels of evidence

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Ribeiro, Daniel Cury, Joelly Mahnic de Toledo, Roberto Costa Krug, and Jefferson Fagundes Loss. "A Comparison between Two Models of Shoulder Muscle Force Estimation." Journal of Applied Biomechanics 25, no. 1 (2009): 43–53. http://dx.doi.org/10.1123/jab.25.1.43.

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Shoulder injuries are often related to rotator cuff muscles. Although there are various models for muscle force estimation, it is difficult to ensure that the results obtained with such models are reliable. The aim of the current study was to compare two models of muscle force estimation. Eight subjects, seven male and one female (mean age of 24 yr; mean height of 1.83 m), performed five isokinetic maximum concentric contractions of internal and external shoulder rotation. Two models with different algorithms were used. In both, the input data consisted of the measured internal rotation moment

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Roh, Jinsook, William Z. Rymer, Eric J. Perreault, Seng Bum Yoo, and Randall F. Beer. "Alterations in upper limb muscle synergy structure in chronic stroke survivors." Journal of Neurophysiology 109, no. 3 (2013): 768–81. http://dx.doi.org/10.1152/jn.00670.2012.

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Previous studies in neurologically intact subjects have shown that motor coordination can be described by task-dependent combinations of a few muscle synergies, defined here as a fixed pattern of activation across a set of muscles. Arm function in severely impaired stroke survivors is characterized by stereotypical postural and movement patterns involving the shoulder and elbow. Accordingly, we hypothesized that muscle synergy composition is altered in severely impaired stroke survivors. Using an isometric force matching protocol, we examined the spatial activation patterns of elbow and should

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Deng, Hongqiong, Yuan Li, Hong Xie, and Shiwei Li. "Kinematics of Shoulder Injuries in Throwing Sports." Journal of Business Administration Research 6, no. 2 (2017): 50. http://dx.doi.org/10.5430/jbar.v6n2p50.

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Muscle injury mechanism should be studied to know how to prevent the muscle injuries. The purpose of this article is to construct a protecting model of shoulder injuries based on classical mechanism and kinematics in throwing sports like baseball pitching, badminton smash, volleyball smash, javelin throwing process etc, and then introduce the products design. Firstly, the biomechanics of muscle were analyzed based on Newton's classical mechanics; then a finite element analysis was used to simulate the shoulder muscles protection. Protective parameters were got to make the protective clothes; f

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Rienmüller, Anna, Nicola A. Maffiuletti, Hans-Kaspar Schwyzer, and Andreas Eggspühler. "Shoulder Muscle Strength and Neuromuscular Activation 2 Years after Reverse Shoulder Prosthesis—An Experimental Case Control Study." Journal of Clinical Medicine 9, no. 2 (2020): 365. http://dx.doi.org/10.3390/jcm9020365.

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Although reverse shoulder arthroplasty (RSA) has shown successful postoperative outcomes, little is known about compensatory activation patterns of remaining shoulder muscles following RSA. The purpose of this experimental case control series was to investigate shoulder muscle strength and neuromuscular activation of deltoid and teres minor muscles 2 years after RSA. Humerus lengthening, center-of-rotation medialization, maximal voluntary strength, and electromyographic (EMG) activity were compared between the operated and the non-operated side of 13 patients (mean age: 73 years). Shoulder mus

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Pontaga, Inese, and Janis Zidens. "Shoulder Rotator Muscle Dynamometry Characteristics: Side Asymmetry and Correlations with Ball-Throwing Speed in Adolescent Handball Players." Journal of Human Kinetics 42, no. 1 (2014): 41–50. http://dx.doi.org/10.2478/hukin-2014-0059.

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Abstract The aim of the investigation was to: 1) compare shoulder external/internal rotator muscles’ peak torques and average power values and their ratios in the dominant and non-dominant arm; 2) determine correlations between shoulder rotator muscles’ peak torques, average power and ball-throwing speed in handball players. Fourteen 14 to 15- year-old male athletes with injury-free shoulders participated in the study (body height: 176 ± 7 cm, body mass 63 ± 9 kg). The tests were carried out by an isokinetic dynamometer system in the shoulder internal and external rotation movements at angular

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Madeleine, Pascal, Hongling Nie, and Lars Arendt-Nielsen. "Dynamic shoulder dynamometry: a way to develop delay onset muscle soreness in shoulder muscles." Journal of Biomechanics 39, no. 1 (2006): 184–88. http://dx.doi.org/10.1016/j.jbiomech.2004.10.027.

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PALMERUD, GUNNAR, ROLAND KADEFORS, HȦKAN SPORRONG, et al. "Voluntary redistribution of muscle activity in human shoulder muscles." Ergonomics 38, no. 4 (1995): 806–15. http://dx.doi.org/10.1080/00140139508925151.

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Swanik, Kathleen A., Kellie Huxel Bliven, and Charles Buz Swanik. "Rotator-Cuff Muscle-Recruitment Strategies During Shoulder Rehabilitation Exercises." Journal of Sport Rehabilitation 20, no. 4 (2011): 471–86. http://dx.doi.org/10.1123/jsr.20.4.471.

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Context:There are contradictory data on optimal muscle-activation strategies for restoring shoulder stability. Further investigation of neuromuscular-control strategies for glenohumeral-joint stability will guide clinicians in decisions regarding appropriate rehabilitation exercises.Objectives:To determine whether subscapularis, infraspinatus, and teres minor (anteroposterior force couple) muscle activation differ between 4 shoulder exercises and describe coactivation ratios and individual muscle-recruitment characteristics of rotator-cuff muscles throughout each shoulder exercise.Design:Cross

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Broström, Lars-Ake, Margareta Kronberg, and Gunnar Nemeth. "Muscle activity during shoulder dislocation." Acta Orthopaedica Scandinavica 60, no. 6 (1989): 639–41. http://dx.doi.org/10.3109/17453678909149593.

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Salian, Shivani Chowdhury, Mansi Modi, and Divya Desai. "THE EFFECTS OF HAND GRIP FORCE ON SHOULDER MUSCLE ACTIVITY AT DIFFERENT ANGLES OF SHOULDER RANGE OF MOTION IN PATIENTS WITH SHOULDER PAIN." International Journal of Physiotherapy and Research 7, no. 5 (2019): 3220–31. http://dx.doi.org/10.16965/ijpr.2019.168.

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