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Journal articles on the topic 'Upper Trapezius Activation'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Tucker, W. Steven, Brian M. Campbell, Erik E. Swartz, and Charles W. Armstrong. "Electromyography of 3 Scapular Muscles: A Comparative Analysis of The Cuff Link Device and a Standard Push-Up." Journal of Athletic Training 43, no. 5 (2008): 464–69. http://dx.doi.org/10.4085/1062-6050-43.5.464.

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Abstract Context: The Cuff Link is a closed kinetic chain rehabilitation apparatus for the upper extremity. Limited research has established its effectiveness to elicit muscle activation of the scapular muscles. Objective: To determine if scapular muscle activation differs in response to 2 upper extremity closed kinetic chain exercises: Cuff Link and standard push-up. Design: A single-group, repeated-measures design. Setting: Controlled laboratory. Patients or Other Participants: Twenty-eight healthy individuals (13 women: age = 19.69 ± 1.55 years, height = 167.44 ± 9.52 cm, mass = 61.00 ± 8.7

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Joshi, Mithun, Charles A. Thigpen, Kevin Bunn, Spero G. Karas, and Darin A. Padua. "Shoulder External Rotation Fatigue and Scapular Muscle Activation and Kinematics in Overhead Athletes." Journal of Athletic Training 46, no. 4 (2011): 349–57. http://dx.doi.org/10.4085/1062-6050-46.4.349.

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Context: Glenohumeral external rotation (GH ER) muscle fatigue might contribute to shoulder injuries in overhead athletes. Few researchers have examined the effect of such fatigue on scapular kinematics and muscle activation during a functional movement pattern. Objective: To examine the effects of GH ER muscle fatigue on upper trapezius, lower trapezius, serratus anterior, and infraspinatus muscle activation and to examine scapular kinematics during a diagonal movement task in overhead athletes. Setting: Human performance research laboratory. Design: Descriptive laboratory study. Patients or

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Mathew, JinceT, Thakur Kunal, Sadhana Meena, JasmineKaur Chawla, and Lakshman Sethu. "Upper trapezius activation during upper limb neural tension test-1 in karate players." Ibnosina Journal of Medicine and Biomedical Sciences 5, no. 4 (2013): 173. http://dx.doi.org/10.4103/1947-489x.210542.

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Gao, Ying, Lars A. Kristensen, Thomas S. Grøndberg, Mike Murray, Gisela Sjøgaard, and Karen Søgaard. "Electromyographic Evaluation of Specific Elastic Band Exercises Targeting Neck and Shoulder Muscle Activation." Applied Sciences 10, no. 3 (2020): 756. http://dx.doi.org/10.3390/app10030756.

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Background: Specific strength training at a high intensity is effective in reducing work related neck/shoulder pain. However, it remains to be documented as to which exercises most specifically target neck and shoulder muscles at high activation level while using simple equipment as e.g., elastic bands. We hypothezised that selected exercises would specifically target the respective muscles, as follows: (1) shrugs and reverse flyes: the upper trapezius muscle, (2) cervical extension and lateral flexion: the upper neck extensor muscle, and (3) cervical flexion and rotation: the sternocleidomast

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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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Murphy, Taylor A., and Michele L. Oliver. "Hydraulic-actuation joystick use: A torque, range of motion and electromyographic description." Occupational Ergonomics 7, no. 3 (2008): 201–13. http://dx.doi.org/10.3233/oer-2007-7305.

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The purpose of this work was to quantify upper limb and joystick kinematics, muscle activation of the prime movers and stabilizers of the shoulder (anterior deltoid, posterior deltoid and upper trapezius) as well as torque exerted by operators of hydraulic-actuation joystick controllers. Dynamic and impact torques were captured through the use of an instrumented joystick. Results indicate that the impact torque (5.36 ± 1.75 N·m for forward motion) sustained as the joystick reaches the end range of motion is substantial and is more than twice that of the operator exerted torque prior to reachin

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Shih, Yi-Fen, Ya-Fang Lee, and Wen-Yin Chen. "Effects of Kinesiology Taping on Scapular Reposition Accuracy, Kinematics, and Muscle Activity in Athletes With Shoulder Impingement Syndrome: A Randomized Controlled Study." Journal of Sport Rehabilitation 27, no. 6 (2018): 560–69. http://dx.doi.org/10.1123/jsr.2017-0043.

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Context:Scapular proprioception is a key concern in managing shoulder impingement syndrome (SIS). However, no study has examined the effect of elastic taping on scapular proprioception performance.Objective:To investigate the immediate effect of kinesiology taping (KT) on scapular reposition accuracy, kinematics, and muscle activation in individuals with SIS.Design:Randomized controlled study.Setting:Musculoskeletal laboratory, National Yang-Ming University, Taiwan.Participants:Thirty overhead athletes with SIS.Interventions:KT or placebo taping over the upper and lower trapezius muscles.Main

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Jensen, Chris, and Rolf H. Westgaard. "Functional subdivision of the upper trapezius muscle during low-level activation." European Journal of Applied Physiology 76, no. 4 (1997): 335–39. http://dx.doi.org/10.1007/s004210050257.

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9

Patel, Jainy P., and Alpa Purohit. "Prevalence of Scapular Dyskinesia in Young Adults with Trapezitis - A Cross-Sectional Study." International Journal of Health Sciences and Research 11, no. 7 (2021): 63–68. http://dx.doi.org/10.52403/ijhsr.20210710.

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Background: An abnormal movement of the scapula during shoulder movement is termed as scapular dyskinesia and is an often-forgotten cause of pain and dysfunction. The scapula is a key part of the upper limb kinematic chain and is a vital component of the glenohumeral rhythm. Trapezitis is an inflammatory pain resulting from trapezius muscle. Trapezius is a stabilizer in Scapular dynamics contributing to scapulohumeral rhythm. Weakness or improper activation of Scapular stabilizers can alter Scapular positioning and mechanics. Aim of this study is to find prevalence of Scapular Dyskinesia in yo

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Richardson, Eleanor, Jeremy S. Lewis, Jo Gibson, et al. "Role of the kinetic chain in shoulder rehabilitation: does incorporating the trunk and lower limb into shoulder exercise regimes influence shoulder muscle recruitment patterns? Systematic review of electromyography studies." BMJ Open Sport & Exercise Medicine 6, no. 1 (2020): e000683. http://dx.doi.org/10.1136/bmjsem-2019-000683.

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ObjectiveTo investigate the influence of trunk and lower limb motion on electromyography (EMG) muscle activity and recruitment patterns around the shoulder.DesignSystematic review.Data sourcesMEDLINE, CINAHL, PEDro, AMED, PubMed, Cochrane Central Register of Controlled trials, Cochrane Database of Systematic reviews, SportsDiscuss and PROSPERO.Eligibility criteriaStudies investigating both multiregional kinetic chain (KC) shoulder exercises and localised non-kinetic chain (nKC) shoulder exercises in healthy subjects under the same experimental conditions were included in this review.ResultsKC

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Park, Se-yeon, Won-gyu Yoo, Hun Kwon, Dong-hyun Kim, Si-eun Lee, and Mi-jin Park. "Scapulothoracic Muscle Activation on Stable and Unstable Support Surfaces." International Journal of Athletic Therapy and Training 18, no. 1 (2013): 25–29. http://dx.doi.org/10.1123/ijatt.18.1.25.

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Activation of the upper trapezius, lower trapezius, serratus anterior, and triceps brachii muscles was measured, while center of pressure excursion beneath the hands was simultaneously monitored, during the performance of a push-up exercise on both a stable and an unstable base of support. The activation levels of all muscles were significantly greater for the unstable support surface when compared to those for a stable support surface (p < 0.05). A negative correlation was found between activation of the serriatus anterior muscle and center of pressure excursion (r = -0.64, p < 0.05). P

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Nascimento, Vinícius Yan Santos, Rafaela Joyce Barbosa Torres, Natália Barros Beltrão, et al. "Shoulder Muscle Activation Levels During Exercises With Axial and Rotational Load on Stable and Unstable Surfaces." Journal of Applied Biomechanics 33, no. 2 (2017): 118–23. http://dx.doi.org/10.1123/jab.2016-0177.

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This study evaluated the effects of instability on the EMG activity of scapular stabilizing and upper limb muscles during exercises with axial and rotational load. Twenty male volunteers (20.9 ± 1.8 years, 174.1 ± 0.04 cm, 73.17 ± 8.77 kg) experienced in strength training participated in a crossover design. Muscle activation of anterior deltoid (AD), posterior deltoid (PD), pectoralis major (PM), biceps brachii (BB), triceps brachii (TB), upper trapezius (UT), middle trapezius (MT), lower trapezius (LT), and serratus anterior (SA) were determined on both conditions. Participants performed a si

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Cools, Ann M., Vincent Dewitte, Frederick Lanszweert, et al. "Rehabilitation of Scapular Muscle Balance." American Journal of Sports Medicine 35, no. 10 (2007): 1744–51. http://dx.doi.org/10.1177/0363546507303560.

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Background Strengthening exercises for the scapular muscles are used in the treatment of scapulothoracic dysfunction related to shoulder injury. In view of the intermuscular and intramuscular imbalances often established in these patients, exercises promoting lower trapezius (LT), middle trapezius (MT), and serratus anterior (SA) activation with minimal activity in the upper trapezius (UT) are recommended. Hypothesis Of 12 commonly used trapezius strengthening exercises, a selection can be performed for muscle balance rehabilitation, based on a low UT/LT, UT/MT, or UT/SA muscle ratio. Study De

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Marker, Ryan J., Serge Campeau, and Katrina S. Maluf. "Psychosocial stress alters the strength of reticulospinal input to the human upper trapezius." Journal of Neurophysiology 117, no. 1 (2017): 457–66. http://dx.doi.org/10.1152/jn.00448.2016.

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Psychosocial stress has been shown to influence several aspects of human motor control associated with the fight-or-flight response, including augmentation of upper trapezius muscle activity. Given the established role of the reticular formation in arousal, this study investigated the contribution of reticulospinal activation to trapezius muscle activity during exposure to an acute psychosocial stressor. Twenty-five healthy adults were exposed to startling acoustic stimuli (SAS) while performing a motor task during periods of low and high psychosocial stress. Acoustic startle reflexes (ASRs) w

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Coratella, Giuseppe, Gianpaolo Tornatore, Stefano Longo, Fabio Esposito, and Emiliano Cè. "An Electromyographic Analysis of Lateral Raise Variations and Frontal Raise in Competitive Bodybuilders." International Journal of Environmental Research and Public Health 17, no. 17 (2020): 6015. http://dx.doi.org/10.3390/ijerph17176015.

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The present study examined the muscle activation in lateral raise with humerus rotated externally (LR-external), neutrally (LR-neutral), internally (LR-internal), with flexed elbow (LR-flexed) and frontal raise during both the concentric and eccentric phase. Ten competitive bodybuilders performed the exercises. Normalized surface electromyographic root mean square (sEMG RMS) was obtained from anterior, medial, and posterior deltoid, pectoralis major, upper trapezius, and triceps brachii. During the concentric phase, anterior deltoid and posterior deltoid showed greater sEMG RMS in frontal rais

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Habechian, Fernanda A. P., Ana Letícia Lozana, Ann M. Cools, and Paula R. Camargo. "Swimming Practice and Scapular Kinematics, Scapulothoracic Muscle Activity, and the Pressure-Pain Threshold in Young Swimmers." Journal of Athletic Training 53, no. 11 (2018): 1056–62. http://dx.doi.org/10.4085/1062-6050-100-17.

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Context Whereas alterations in scapular kinematics, scapulothoracic muscle activity, and pain sensitivity have been described in adult swimmers, no researchers have examined these outcomes in young swimmers. Objectives To compare scapular kinematics, scapulothoracic muscle activation, and the pressure-pain threshold (PPT) of the shoulder muscles among young nonpractitioners (those who were not involved in sports involving the upper limbs), amateur swimmers, and competitive swimmers. Design Cross-sectional study. Setting Laboratory. Patients or Other Participants A total of 90 individuals (age

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McGarvey, Aoife C., Peter Grant Osmotherly, Gary R. Hoffman, and Pauline E. Chiarelli. "Scapular Muscle Exercises Following Neck Dissection Surgery for Head and Neck Cancer: A Comparative Electromyographic Study." Physical Therapy 93, no. 6 (2013): 786–97. http://dx.doi.org/10.2522/ptj.20120385.

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Background Shoulder pain and dysfunction can occur following neck dissection surgery for cancer. These conditions often are due to accessory nerve injury. Such an injury leads to trapezius muscle weakness, which, in turn, alters scapular biomechanics. Objective The aim of this study was to assess which strengthening exercises incur the highest dynamic activity of affected trapezius and accessory scapular muscles in patients with accessory nerve dysfunction compared with their unaffected side. Design A comparative design was utilized for this study. Methods The study was conducted in a physical

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Baláš, Jiří, Alena Duchačová, David Giles, Kateřina Kotalíková, David Pánek, and Nick Draper. "Shoulder Muscle Activity in Sport Climbing in Naturally Chosen and Corrected Shoulder Positions." Open Sports Sciences Journal 10, no. 1 (2017): 107–13. http://dx.doi.org/10.2174/1875399x01710010107.

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Objective:The aim of the study was to determine electromyographic activity of the scapula stabilizing muscles in naturally chosen and corrected shoulder positions in typical static climbing postures.Methods:Six male participants undertook surface electromyography measurement in four climbing postures for two different shoulder positions. The activity of the lower, middle and upper trapezius, serratus anterior, pectoralis major, and sternocleidomastoid was recorded. Electromyographic activity was expressed as the percentage of maximal voluntary contraction (MVC) for each muscle.Results:Climbing

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Torres, Rafaela J. B., André L. T. Pirauá, Vinícius Y. S. Nascimento, et al. "Shoulder Muscle Activation Levels During the Push-Up-Plus Exercise on Stable and Unstable Surfaces." Journal of Sport Rehabilitation 26, no. 4 (2017): 281–86. http://dx.doi.org/10.1123/jsr.2016-0050.

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The aim of this study was to evaluate the acute effect of the use of stable and unstable surfaces on electromyography (EMG) activity and coactivation of the scapular and upper-limb muscles during the push-up plus (with full protraction of the scapula). Muscle activation of anterior deltoid (AD), posterior deltoid (PD), pectoralis major, biceps brachii (BB), triceps brachii (TB), upper trapezius (UT), middle trapezius (MT), lower trapezius (LT), and serratus anterior (SA) levels and coactivation index were determined by surface EMG in 20 young men during push-up plus performed on a stable and u

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Contemori, Samuele, and Andrea Biscarini. "Isolated Infraspinatus Atrophy Secondary to Suprascapular Nerve Neuropathy Results in Altered Shoulder Muscles Activity." Journal of Sport Rehabilitation 28, no. 3 (2019): 219–28. http://dx.doi.org/10.1123/jsr.2017-0232.

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Context: Isolated infraspinatus atrophy (IIA) is a common condition among overhead activity athletes, which affects the hitting shoulder and is caused by suprascapular nerve injury. The loss of infraspinatus function could lead to altered activity of the glenohumeral and scapulothoracic (ST) muscles and compromise the optimal shoulder function. Objective: To assess the surface electromyographic (sEMG) activity patterns, relationships, and response latencies of relevant shoulder girdle muscles in professional volleyball players with IIA and in healthy control players. Design: Cross-sectional st

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de Araújo, Rodrigo Cappato, Vinícius Yan Santos Nascimento, Rafaela Joyce Barbosa Torres, Francis Trombini-Souza, David Behm, and Ana Carolina Rodarti Pitangui. "Can the Use of Unstable Surfaces and Instruction for Conscious Abdominal Contraction Increase the EMG Activity of the Periscapular Muscles During the Dynamic Push-Up?" Journal of Sport Rehabilitation 29, no. 2 (2020): 225–30. http://dx.doi.org/10.1123/jsr.2018-0165.

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Context: It is believed that conscious abdominal contraction (CAC) during exercise encourages greater periscapular activation through existing myofascial connections. On the other hand, it is postulated that the use of unstable surfaces would promote greater neuromuscular demand. Objective: To analyze the effect of CAC on periscapular muscle activity during push-up plus exercise on stable and unstable surfaces and to evaluate the correlation between electromyographic (EMG) activity of the serratus anterior (SA) and abdominal oblique muscles. Design: Repeated-measures design in a single group,

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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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Voerman, G. E., M. M. R. Vollenbroek-Hutten, and H. J. Hermens. "Upper trapezius muscle activation patterns in neck–shoulder pain patients and healthy controls." European Journal of Applied Physiology 102, no. 1 (2006): 1–9. http://dx.doi.org/10.1007/s00421-006-0215-8.

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Park, Se-yeon, and Won-gyu Yoo. "Effects of Push-Up Exercise Phase and Surface Stability on Activation of the Scapulothoracic Musculature." International Journal of Athletic Therapy and Training 18, no. 4 (2013): 34–38. http://dx.doi.org/10.1123/ijatt.18.4.34.

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Objective:The purpose of this study was to measure muscle activation during ascending and descending phases of the push-up exercise on both stable and unstable support surfaces.Participants:Fourteen asymptomatic male amateur badminton players. During push-up exercises on stable and unstable bases, muscle activation measurements were collected with phase divisions (ascending and descending phase).Methods:Electromyography (EMG) was utilized to measure activation of the upper trapezius (UT) and lower trapezius (LT), middle serratus anterior (MSA) and lower serratus anterior (LSA), pectoralis majo

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Nessler, Jeff A., Thomas Hastings, Kevin Greer, and Sean C. Newcomer. "Wearing an Inflatable Vest Alters Muscle Activation and Trunk Angle While Paddling a Surfboard." Journal of Applied Biomechanics 33, no. 4 (2017): 282–87. http://dx.doi.org/10.1123/jab.2016-0248.

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Low back pain is a commonly reported problem among recreational surfers. Some individuals report that wearing a vest with an inflatable bladder that alters trunk angle may help to alleviate pain. The purpose of this study was to determine whether such a vest has an effect on muscle activation and extension of the lower back. Twelve recreational surfers completed 12 paddling trials at 1.1 m/s in a swim flume on both a shortboard and a longboard on 2 separate days. Three conditions of no vest, vest uninflated, and vest inflated were presented to participants in random order. Surface EMG and trun

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Talts, Viire, Jaan Ereline, Tatjana Kums, Mati Pääsuke, and Helena Gapeyeva. "Upper Extremity and Cue Kinematics, and Shoulder Muscle Electromyographic Activity of Novus Players of Different Skill Levels." Journal of Applied Biomechanics 33, no. 2 (2017): 124–29. http://dx.doi.org/10.1123/jab.2016-0124.

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Our aim with the current study was to compare upper extremity and cue kinematics, and electromyographic (EMG) activation of shoulder muscles during novus (a special form of billiards) shots of different difficulty levels. Ten proficient and 10 less-skilled novus players performed 3 types of novus shots (penalties, cuts, rebounds) 10 times each. During each shot, elbow flexion and cue–forearm angles (using a movement analysis system), and surface EMG activity of the trapezius, posterior, and lateral deltoid muscles of each subject’s dominant side, were measured. Data were compared between more-

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Kim, Soo-Yong, Il-Young Yu, Jae-Seop Oh, and Min-Hyeok Kang. "Effects of Intended Scapular Posterior Tilt Motion on Trapezius Muscle Electromyography Activity." International Journal of Environmental Research and Public Health 18, no. 17 (2021): 9147. http://dx.doi.org/10.3390/ijerph18179147.

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The intended scapular motion is a strategy to strengthen the lower trapezius (LT). However, few studies have explored the effects of the intended scapular posterior tilt motion on selective LT activation. Thus, the present study investigated the effect of the intended scapular posterior tilt on the electromyography (EMG) activity of trapezius muscles during prone shoulder horizontal abduction (PSHA). Eighteen asymptomatic men performed three types of PSHA: (1) preferred PSHA, (2) PSHA with the intended scapular posterior tilt, and (3) PSHA with the intended scapular posterior tilt and trunk ex

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Jones, Sean A., Derek N. Pamukoff, Timothy C. Mauntel, J. Troy Blackburn, and Joseph B. Myers. "The Influence of Verbal and Tactile Feedback on Electromyographic Amplitude of the Shoulder Musculature During Common Therapeutic Exercises." Journal of Sport Rehabilitation 27, no. 5 (2018): 424–30. http://dx.doi.org/10.1123/jsr.2016-0233.

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Context:Verbal and tactile feedback (VTF) during rehabilitation exercises can increase muscle activation, thus improving the therapeutic benefits. However, it is unclear which feedback method elicits the greatest electromyographic (EMG) amplitude.Objective:To determine if the addition of tactile to verbal feedback (VF) increases EMG amplitude of selected shoulder musculature during scapular plane elevation (Ys), shoulder horizontal abduction with external rotation (Ts), and scapular retraction with external rotation (Ws).Design:Repeated-measures cross-over design.Setting:Biomechanics laborator

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Rumsey, Hannah E., Sahil Aggarwal, Erin M. Hobson, Jeeyn Park, and Peter Pidcoe. "Anxiety’s Effect on Muscle Activation and Fatigue in Trumpet Players: A Pilot Study." Medical Problems of Performing Artists 30, no. 4 (2015): 203–10. http://dx.doi.org/10.21091/mppa.2015.4038.

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Due to the high percentage of musicians who suffer from musculoskeletal disorders, there is a need for more research in the field of music and medicine. The purpose of this study was to analyze the possible relationship between anxiety, muscle activation, and muscle fatigue in undergraduate trumpet players. Assessment tools included surface electromyography (sEMG) data, State Trait Anxiety Inventory (STAI), and Visual Analogue Scales (VAS) of perceived anxiety. Data were collected from 27 undergraduate music students across five universities (22 males, 5 females) aged 18 to 24 years. The three

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Chahal, Rajwant Kaur, and Pravin Kumar. "Alteration in Activation Pattern of Neck Muscles in Patients with Chronic Neck Pain." International Journal of Head and Neck Surgery 6, no. 1 (2015): 1–7. http://dx.doi.org/10.5005/jp-journals-10001-1207.

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ABSTRACT Objective The aim of this study was to investigate activation pattern of neck muscles in patients with chronic neck pain of nontraumatic origin during static tasks. Materials and methods Fifteen normal subjects were taken in group A and 15 patients with chronic neck pain of nontraumatic origin were taken in group B. Electromyography (EMG) activity was recorded from the sternocleidomastoid, anterior scalene, levator scapulae and upper trapezius muscles. Percentage maximum voluntary isometric contraction were calculated during static tasks, which included shoulder abduction to 90° and h

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Celic, Selena, Eunsik Kim, and Jill Urbanic. "Exercise Equipment Development for Safe Activation of the Medial Deltoid." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 64, no. 1 (2020): 950–54. http://dx.doi.org/10.1177/1071181320641227.

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The medial deltoid muscle is a small – and often neglected – muscle in comparison to other muscular systems in the immediately surrounding area of the upper body. If there is low or improper focus on the medial deltoid, there is a high risk of muscle imbalances and dysfunctions. Limited equipment exists today for proper training of the medial deltoid muscle; meaning there exists an opportunity to develop equipment which can safely and intuitively activate the medial deltoid muscle. To ensure maximization of the medial deltoid without increasing the activation of the surrounding muscles, the ac

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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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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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Park, Sin-Ae, Sae-Room Oh, Kwan-Suk Lee, and Ki-Cheol Son. "Electromyographic Analysis of Upper Limb and Hand Muscles during Horticultural Activity Motions." HortTechnology 23, no. 1 (2013): 51–56. http://dx.doi.org/10.21273/horttech.23.1.51.

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This study used electromyographic analysis to investigate specific upper limb and hand muscle activation during 15 common horticultural activities. A total of 30 Korean adults between the ages of 20 and 30 years, with an average age of 24.8 years, were recruited from Konkuk University, Seoul, South Korea. Electromyographic measurements were made using a portable four-channel electromyograph. Bipolar surface electromyography (EMG) electrodes were attached to six upper limb muscles (i.e., upper trapezius, triceps—long head, biceps brachialis, flexor carpi ulnaris, flexor carpi radialis, and brac

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Roman-Liu, Danuta, and Krzysztof Kȩdzior. "Differences in muscular activation and fatigue for intermittent and constant load." Occupational Ergonomics 5, no. 1 (2005): 43–56. http://dx.doi.org/10.3233/oer-2005-5105.

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The aim of this study was to compare the influence of constant or intermittent load on muscle activation and fatigue. The analysis and assessment of muscular activation and fatigue was based on surface EMG measurements from eight muscles (seven muscles of the right upper limb and trapezius muscle). Two EMG signal parameters were analyzed for each of the experimental conditions distinguished by the value of the external force and the character of the load – constant or intermittent. The amplitude related to its maximum (AMP) and the slope of the regression line between time and median frequency

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Nakamura, Yukiko, Masaaki Tsuruike, and Todd S. Ellenbecker. "Electromyographic Activity of Scapular Muscle Control in Free-Motion Exercise." Journal of Athletic Training 51, no. 3 (2016): 195–204. http://dx.doi.org/10.4085/1062-6050-51.4.10.

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The appropriate resistance intensity to prescribe for shoulder rehabilitative exercise is not completely known. Excessive activation of the deltoid and upper trapezius muscles could be counterproductive for scapulohumeral rhythm during humeral elevation.Context: To identify the effects of different exercise intensities on the scapular muscles during a free-motion “robbery” exercise performed in different degrees of shoulder abduction in seated and standing positions.Objective: Descriptive laboratory study.Design: Kinesiology Adapted Physical Education Laboratory.Setting: A total of 15 healthy

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Holton, Julia E., Robert D. Clark, Cory J. Greever, and Heather Smith. "The Effectiveness Of Electromyography Biofeedback At Improving The Upper Trapezius To Serratus Anterior Activation Ratio." Medicine & Science in Sports & Exercise 52, no. 7S (2020): 193. http://dx.doi.org/10.1249/01.mss.0000675612.00373.55.

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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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Kiatkulanusorn, Sirirat, Bhornluck Paepetch Suato, and Phurichaya Werasirirat. "Analysis of neck and back muscle activity during the application of various pillow designs in patients with forward head posture." Journal of Back and Musculoskeletal Rehabilitation 34, no. 3 (2021): 431–39. http://dx.doi.org/10.3233/bmr-200038.

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BACKGROUND: There are currently no reports of biomechanical changes in patients with forward head posture (FHP) that result in altered muscle activation throughout various functions with muscle activation response during diverse sleep postures. OBJECTIVE: This study investigated neck and back muscle activity in individuals with and without FHP during a maintained side-sleeping position by incorporating various pillow designs. METHODS: Thirty-four participants (i.e., 17 in each group) were enrolled. The muscle activity was investigated via surface electromyography during the use of three trial

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Bergquist, Ronny, Vegard Moe Iversen, Paul J. Mork, and Marius Steiro Fimland. "Muscle Activity in Upper-Body Single-Joint Resistance Exercises with Elastic Resistance Bands vs. Free Weights." Journal of Human Kinetics 61, no. 1 (2018): 5–13. http://dx.doi.org/10.1515/hukin-2017-0137.

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Abstract Elastic resistance bands require little space, are light and portable, but their efficacy has not yet been established for several resistance exercises. The main objective of this study was to compare the muscle activation levels induced by elastic resistance bands versus conventional resistance training equipment (dumbbells) in the upper-body resistance exercises flyes and reverse flyes. The level of muscle activation was measured with surface electromyography in 29 men and women in a cross-over design where resistance loadings with elastic resistance bands and dumbbells were matched

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Yoo, Won-gyu. "Comparison of activation and change in the upper trapezius muscle during painful and non-painful computer work." Journal of Physical Therapy Science 27, no. 10 (2015): 3283–84. http://dx.doi.org/10.1589/jpts.27.3283.

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Cole, Ashley K., Melanie L. McGrath, Shana E. Harrington, Darin A. Padua, Terri J. Rucinski, and William E. Prentice. "Scapular Bracing and Alteration of Posture and Muscle Activity in Overhead Athletes With Poor Posture." Journal of Athletic Training 48, no. 1 (2013): 12–24. http://dx.doi.org/10.4085/1062-6050-48.1.13.

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Context: Overhead athletes commonly have poor posture. Commercial braces are used to improve posture and function, but few researchers have examined the effects of shoulder or scapular bracing on posture and scapular muscle activity. Objective: To examine whether a scapular stabilization brace acutely alters posture and scapular muscle activity in healthy overhead athletes with forward-head, rounded-shoulder posture (FHRSP). Design: Randomized controlled clinical trial. Setting: Applied biomechanics laboratory. Patients or Other Participants: Thirty-eight healthy overhead athletes with FHRSP.

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Kelson, Denean, Divya Srinivasan, and Svend Erik Mathiassen. "Differences in trapezius muscle activation patterns in office workers with and without chronic neck-shoulder pain, as quantified through exposure variation analysis." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 62, no. 1 (2018): 962–66. http://dx.doi.org/10.1177/1541931218621222.

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The purpose of this study was to quantify upper-trapezius muscle activation patterns using exposure variation analysis (EVA) in healthy computer workers and those with chronic neck-shoulder pain. Eight healthy and five chronic pain participants were asked to complete three computer-based tasks (TYPE, CLICK, and FORM) in two pacing conditions (self-paced and control-paced). EVA was used to quantify variation using five amplitude classes and five duration classes. Performance in each task was also quantified. Healthy workers and those with chronic pain did not differ in performance, and they bot

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Karabay, Damla, Yusuf Emük, and Derya Özer Kaya. "Muscle Activity Ratios of Scapular Stabilizers During Closed Kinetic Chain Exercises in Healthy Shoulders: A Systematic Review." Journal of Sport Rehabilitation 29, no. 7 (2020): 1001–18. http://dx.doi.org/10.1123/jsr.2018-0449.

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Context: Selective strengthening of scapular stabilizers is one of the emphases of the recent literature. Closed kinetic chain (CKC) exercises are used extensively in shoulder rehabilitation. However, a limited number of studies have reported scapular muscle ratios during CKC exercises. Objectives: To determine the CKC exercises producing the optimal ratios of the scapular stabilizer muscles in healthy shoulders. Evidence Acquisition: A systematic search within PubMed, Embase, CINAHL Plus, and SPORTDiscus with Full Text and ULAKBIM National Medical Database was performed up to January 2018. St

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Westgaard, R. H., P. Bonato, and K. A. Holte. "Low-Frequency Oscillations (<0.3 Hz) in the Electromyographic (EMG) Activity of the Human Trapezius Muscle During Sleep." Journal of Neurophysiology 88, no. 3 (2002): 1177–84. http://dx.doi.org/10.1152/jn.2002.88.3.1177.

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The surface electromyographic (EMG) signal from right and left trapezius muscles and the heart rate were recorded over 24 h in 27 healthy female subjects. The root-mean-square (RMS) value of the surface EMG signals and the heartbeat interval time series were calculated with a time resolution of 0.2 s. The EMG activity during sleep showed long periods with stable mean amplitude, modulated by rhythmic components in the frequency range 0.05–0.2 Hz. The ratio between the amplitude of the oscillatory components and the mean amplitude of the EMG signal was approximately constant over the range withi

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Cross, Janelle A., John deVries, Mason Mocarski, et al. "Electromyography of the Shoulder Musculature during Passive Rehabilitation Exercises." Journal of Shoulder and Elbow Arthroplasty 4 (January 2020): 247154922096004. http://dx.doi.org/10.1177/2471549220960044.

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Background Medical professionals remain conflicted about the best rehabilitation protocol a patient should perform after rotator cuff repair surgery. Exercises deemed passive may be activating the shoulder muscles to a moderate level, thus putting the surgical repair construct at risk for re-injury. The purpose of this study was to measure the activation of the rotator cuff and surrounding musculature during exercises used in physical therapy following rotator cuff repair surgery using electromyography (EMG). Methods Muscle activation was recorded in fourteen participants performing sixteen ex

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Bae, Youngsook. "Standing Up from a Chair with an Asymmetrical Initial Foot Position Decreases Trunk and Masticatory Muscle Activities in Healthy Young Men." Healthcare 8, no. 4 (2020): 480. http://dx.doi.org/10.3390/healthcare8040480.

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This study aimed to identify the activation of lower extremity, trunk, and masticatory muscle and trunk kinematics of the initial foot position during the sit-to-stand (STS) movement. Sixteen young men participated in this cross-sectional pilot study and performed STS using both symmetrical and asymmetrical foot positions. Activation of the tibialis anterior (TA), gastrocnemius lateral head (GA), rectus femoris (RF), biceps femoris (BF), rectus abdominis, erector spinae (ES), sternocleidomastoid (SCM), upper trapezius (UT), temporalis (TE), and masseter muscles in the dominant side was determi

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Marcolin, Giuseppe, Nicola Petrone, Tatiana Moro, Giuseppe Battaglia, Antonino Bianco, and Antonio Paoli. "Selective Activation of Shoulder, Trunk, and Arm Muscles: A Comparative Analysis of Different Push-Up Variants." Journal of Athletic Training 50, no. 11 (2015): 1126–32. http://dx.doi.org/10.4085/1062-6050-50.9.09.

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Context The push-up is a widely used exercise for upper limb strengthening that can be performed with many variants. A comprehensive analysis of muscle activation during the ascendant phase (AP) and descendant phase (DP) in different variants could be useful for trainers and rehabilitators. Objective To obtain information on the effect of different push-up variants on the electromyography (EMG) of a large sample of upper limb muscles and to investigate the role of the trunk and abdomen muscles during the AP and DP. Design Cross-sectional study. Setting University laboratory. Patients or Other

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Yoo, Won-Gyu, and Young-In Hwang. "Activation and Ratio of the Upper Trapezius and Serratus Anterior Muscles during Dynamic and Isometric Exercises on Various Support Surfaces." Journal of Physical Therapy Science 22, no. 3 (2010): 267–71. http://dx.doi.org/10.1589/jpts.22.267.

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Falla, D., L. Arendt-Nielsen, and D. Farina. "The pain-induced change in relative activation of upper trapezius muscle regions is independent of the site of noxious stimulation." Clinical Neurophysiology 120, no. 1 (2009): 150–57. http://dx.doi.org/10.1016/j.clinph.2008.10.148.

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