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Deniz V, Sariyildiz A, Buyuktas B, Basaran S. Comparison of the activation and mechanical properties of scapulothoracic muscles in young tennis players with and without scapular dyskinesis: an observational comparative study. J Shoulder Elbow Surg 2024; 33:192-201. [PMID: 37579939 DOI: 10.1016/j.jse.2023.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 07/01/2023] [Accepted: 07/10/2023] [Indexed: 08/16/2023]
Abstract
BACKGROUND In tennis athletes with scapular dyskinesis, the activation of the scapulothoracic muscles during serve is not known. Also, the mechanical properties (tone, elasticity, and stiffness) of the scapulothoracic muscles of the tennis athletes with scapular dyskinesis are likely to change. The study aimed to evaluate the activation of the scapulothoracic muscles while performing tennis serve and to determine the changes in the mechanical properties of the same muscles in young tennis athletes with scapular dyskinesis. METHODS Seventeen tennis athletes with scapular dyskinesis aged between 11 and 18 years (the scapular dyskinesis group) and age- and gender-matched 17 asymptomatic tennis athletes (the control group) were included in the study. Activation of scapulothoracic muscles (descending-transverse-ascending trapezius and serratus anterior) in the 3 phases (preparation, acceleration, and follow-through) of the serve was evaluated using surface electromyography, and the mechanical properties of the same muscles were measured at rest by myotonometry. RESULTS Ascending trapezius activation in the follow-through phase was lower in the scapular dyskinesis group compared with the control group (mean difference 95% confidence interval: -22.8 [-41.2 to -4.5]) (P = .017). The tone and stiffness of the transverse trapezius (P = .043 and P = .017, respectively) were higher, whereas the same parameters of the ascending trapezius were lower (P = .008 and P = .010, respectively) in the scapular dyskinesis group compared with the control group. CONCLUSIONS Activation of the ascending trapezius and the tone and stiffness of the transverse-ascending trapezius were altered in tennis athletes with scapular dyskinesis. Implementations to improve these changes can be included in the rehabilitation or training programs of young tennis athletes with scapular dyskinesis.
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Affiliation(s)
- Volkan Deniz
- Department of Physiotherapy and Rehabilitation, Tarsus University Faculty of Health Sciences, Mersin, Turkey.
| | - Aylin Sariyildiz
- Department of Physical Medicine and Rehabilitation, Cukurova University Faculty of Medicine, Adana, Turkey
| | - Bilgihan Buyuktas
- Department of Physical Education and Sports Teacher, Cukurova University Faculty of Sports Sciences, Adana, Turkey
| | - Sibel Basaran
- Department of Physical Medicine and Rehabilitation, Cukurova University Faculty of Medicine, Adana, Turkey
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Azhdari N, Ebrahimi S, Abolahrari-Shirazi S, Rojhani-Shirazi Z, Bervis S, Ghahramani L. Investigating the lumbar proprioception and core muscles recruitment pattern while getting up from a chair with weight lifting in patients with chronic functional constipation: cross-sectional study. Int Urogynecol J 2024; 35:109-117. [PMID: 37991565 DOI: 10.1007/s00192-023-05673-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 10/01/2023] [Indexed: 11/23/2023]
Abstract
INTRODUCTION AND HYPOTHESIS Patients with chronic functional constipation have some problems such as weakness of pelvic floor muscles, and a lack of coordination of pelvic floor and abdominal muscles has been seen. The goal of this study was to investigate the lumbar proprioception and the core muscle recruitment pattern. METHODS The study type is a cross-sectional case-control study. There were 30 participants (case, n = 15, and control, n = 15). Electromyography of the core muscles was recorded while the subjects were getting up from the chair accompanied by lifting a weight, to check the pattern of muscle recruitment. Moreover, the lumbar proprioception was evaluated by an isokinetic device in both groups. The study was analyzed using independent t test and Mann-Whitney U test, and a nonparametric Friedman test was performed followed by Bonferroni pairwise comparison. RESULTS The comparison of muscle activity delay between the two groups showed that there was a significant difference between the two groups regarding the abdominal muscles, anal sphincter, and erector spinae (p < 0.05). However, there was no significant difference in the rectus femoris and gluteal muscles between the two groups (p > 0.05). Moreover, the proprioception of the lumbar region showed a significant difference (p < 0.05) between the two groups. CONCLUSIONS The results of this study demonstrated that the lumbar proprioception sense was reduced in the case group. This result can be justified, based on the problems in constipation (lack of coordination of muscles, weakness of pelvic floor muscles). The coordination of core muscles changed in patients with chronic functional constipation during a functional task.
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Affiliation(s)
- Negar Azhdari
- Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Physical Therapy, School of Rehabilitation Sciences, Shiraz University of Medical Sciences, 1st, Abivardi Avenue, Chamran Blvd, Shiraz, Iran
| | - Samaneh Ebrahimi
- Department of Physical Therapy, School of Rehabilitation Sciences, Shiraz University of Medical Sciences, 1st, Abivardi Avenue, Chamran Blvd, Shiraz, Iran.
- Rehabilitation Science Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Sara Abolahrari-Shirazi
- Department of Physical Therapy, School of Rehabilitation Sciences, Shiraz University of Medical Sciences, 1st, Abivardi Avenue, Chamran Blvd, Shiraz, Iran
- Rehabilitation Science Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Zahra Rojhani-Shirazi
- Department of Physical Therapy, School of Rehabilitation Sciences, Shiraz University of Medical Sciences, 1st, Abivardi Avenue, Chamran Blvd, Shiraz, Iran
- Rehabilitation Science Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Soha Bervis
- Rehabilitation Science Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Leila Ghahramani
- Department of Colorectal Surgery, School of Medicine Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
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Houry M, Bonnard M, Tourny C, Gilliaux M. Kinematic, electromyographic and isokinetic measurements for the management of shoulder subacromial pain syndrome: A systematic review. Clin Biomech (Bristol, Avon) 2023; 107:106029. [PMID: 37348207 DOI: 10.1016/j.clinbiomech.2023.106029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 01/24/2023] [Accepted: 06/12/2023] [Indexed: 06/24/2023]
Abstract
BACKGROUND Subacromial shoulder pain syndrome is a very common and challenging musculoskeletal disorder. Kinematics, electromyographic muscle activity and isokinetic dynamometry are promising non-invasive movement analysis tools to improve understanding of this condition. No review has combined their results to provide a better understanding of the effects of subacromial pain syndrome on shoulder movement. This systematic review aimed to synthesise the associations between exposure to shoulder pain due to subacromial pain syndromes or subacromial impingement and changes in shoulder movement measures. METHODS The databases were Scholar google, Pubmed, Science Direct, Scopus and the Cochrane Library. We included studies that observed the association of the presence of subacromial pain syndromes or subacromial impingement with changes in shoulder motion measures. FINDINGS Seventeen studies with 943 participants were included. The main kinematic change was a lower scapular posterior during abduction in the subacromial pain syndrome group with a "low" level of evidence (standardised mean difference = -0.61, 95% confidence interval [-0.80; -0.43]). The main electromyographic change was an earlier onset of activation of the upper trapezius in the subacromial pain syndrome group, with a "moderate" level of evidence (standardised mean difference = 1.01, 95% confidence interval: [-2.97; 0.96]). The main isokinetic change was a lower peak internal rotator torque in the subacromial pain syndrome group, with a 'low' level of evidence (standardised mean difference = -0.41, 95% confidence interval: [-0.53; -0.29]). INTERPRETATION The variables measured during movement are associated with subacromial pain syndrome or subacromial impingement syndrome. Consistency between the results supports the importance of scapula biomechanics measurements in these conditions.
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Affiliation(s)
- Maxime Houry
- CETAPS EA3832, Research Center for Sports and Athletic Activities Transformations, University of Rouen Normandy, F-76821 Mont-Saint-Aignan, France; Clinical Research Departement, La Musse Hospital, La Renaissance Sanitaire Fundation, Saint Sébastien de Morsent, France.
| | | | - Claire Tourny
- CETAPS EA3832, Research Center for Sports and Athletic Activities Transformations, University of Rouen Normandy, F-76821 Mont-Saint-Aignan, France
| | - Maxime Gilliaux
- CETAPS EA3832, Research Center for Sports and Athletic Activities Transformations, University of Rouen Normandy, F-76821 Mont-Saint-Aignan, France; Clinical Research Departement, La Musse Hospital, La Renaissance Sanitaire Fundation, Saint Sébastien de Morsent, France
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Vila-Dieguez O, Heindel MD, Awokuse D, Kulig K, Michener LA. Exercise for rotator cuff tendinopathy: Proposed mechanisms of recovery. Shoulder Elbow 2023; 15:233-249. [PMID: 37325389 PMCID: PMC10268139 DOI: 10.1177/17585732231172166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 04/08/2023] [Accepted: 04/11/2023] [Indexed: 06/17/2023]
Abstract
Rotator cuff (RC) tendinopathy is a common recurrent cause of shoulder pain, and resistance exercise is the first-line recommended intervention. Proposed causal mechanisms of resistance exercise for patients with RC tendinopathy consist of four domains: tendon structure, neuromuscular factors, pain and sensorimotor processing, and psychosocial factors. Tendon structure plays a role in RC tendinopathy, with decreased stiffness, increased thickness, and collagen disorganization. Neuromuscular performance deficits of altered kinematics, muscle activation, and force are present in RC tendinopathy, but advanced methods of assessing muscle performance are needed to fully assess these factors. Psychological factors of depression, anxiety, pain catastrophizing, treatment expectations, and self-efficacy are present and predict patient-reported outcomes. Central nervous system dysfunctions also exist, specifically altered pain and sensorimotor processing. Resisted exercise may normalize these factors, but limited evidence exists to explain the relationship of the four proposed domains to trajectory of recovery and defining persistent deficits limiting outcomes. Clinicians and researchers can use this model to understand how exercise mediates change in patient outcomes, develop subgroups to deliver patient-specific approach for treatment and define metrics to track recovery over time. Supporting evidence is limited, indicating the need for future studies characterizing mechanisms of recovery with exercise for RC tendinopathy.
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Affiliation(s)
- Oscar Vila-Dieguez
- Division of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, CA, USA
| | - Matthew D. Heindel
- Division of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, CA, USA
| | - Daniel Awokuse
- Division of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, CA, USA
| | - Kornelia Kulig
- Division of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, CA, USA
| | - Lori A. Michener
- Division of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, CA, USA
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5
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Wang DM, Li C, Hatchard N, Chang Chien GC, Alm J. Lower trapezius muscle function in people with and without shoulder and neck pain: a systematic review. J Osteopath Med 2023; 123:73-89. [PMID: 36100364 DOI: 10.1515/jom-2022-0056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 08/04/2022] [Indexed: 01/27/2023]
Abstract
CONTEXT Shoulder and neck pain are leading causes of disability worldwide. Rotator cuff pathology has strong associations with such pain and is extensively targeted by healthcare practitioners. A dysfunctional lower trapezius muscle has also been shown to contribute to neck and shoulder pain, yet it is often overlooked. OBJECTIVES This systematic review analyzes those with a history of, or who are currently managing, shoulder or neck pain to indicate differences in measures of lower trapezius function when compared to subjects without that pain. METHODS Studies with no age restrictions were included in the study. Studies could determine lower trapezius muscle function with any quantifiable measurement tool or clinical assessment. If the study included a control group (no pain) and a comparator group (pain), and if lower trapezius muscle function was assessed in both, the study was typically included. The significance of the lower trapezius muscle function change was summarized in these pain patients. From a final total of 18 studies identified, level of muscle activity, muscle activation, time to onset, muscle strength, and muscle thickness were reported. RESULTS The 18 included articles involved 485 participants with shoulder and/or neck pain and 455 without. Half of the shoulder pain studies (6/12), and all of the neck pain studies (6/6), demonstrated that the lower trapezius had a noticeable impact. The lower trapezius muscle in participants with shoulder and neck pain tended to show decreased muscle strength, and decreased time to onset/latency. CONCLUSIONS The findings from this systematic review should be taken into consideration when assessing and treating patients with shoulder and neck pain. Future studies that define the type and duration of shoulder and neck pain, as well as prospectively assessing lower trapezius muscle function in those with and without that pain, are needed.
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Affiliation(s)
- Daniel M Wang
- Kansas City University, 1750 Independence Avenue, Kansas City, MO 64106-1453, USA
| | - Crystal Li
- University of Maryland School of Medicine, Baltimore, MD, USA
| | - Nicole Hatchard
- Philadelphia College of Osteopathic Medicine, Philadelphia, PA, USA
| | - George C Chang Chien
- Pain Management, Ventura County Medical Center, Ventura, CA, USA.,Center for Regenerative Medicine, Southern California University of Health Sciences, Whittier, CA, USA
| | - John Alm
- Department of Rehabilitation Medicine, The University of Kansas Medical Center, Kansas City, KS, USA
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Application of Internet of Things Artificial Intelligence and Knowledge Innovation System in Table Tennis Teaching and Training. Appl Bionics Biomech 2022; 2022:7625626. [PMID: 35498138 PMCID: PMC9054474 DOI: 10.1155/2022/7625626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/25/2022] [Accepted: 04/05/2022] [Indexed: 11/24/2022] Open
Abstract
The Internet of Things is an important link in the future development of the Internet and will have a significant impact on development over the next five years or so. The purpose of this article is to learn how to use the Internet of Things to learn and practice table tennis and find new ways to integrate table tennis and the internet. This article proposes to build a detection system for IoT sensors and collect information about the ball's movement state and the athlete's movement state during table tennis. Through data analysis, we better guide athletes to develop table tennis training. At the same time, it also uses knowledge innovation to integrate the Internet of Things with the reality of life and better derive the development of the Internet of Things artificial intelligence. Based on this, this paper designs the construction of IoT sensors to collect the sports status of table tennis enthusiasts and verify the sports experience of table tennis enthusiasts by comparing factors such as physical training, basic skills and mobile training, interest, and confidence. The experimental results of this article show that the Internet of Things artificial intelligence has great potential, and it can innovatively promote industrial change. It better realizes the teaching and training of table tennis players and improves the teaching and training ability of table tennis by 20%.
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Chen MZ, Wang X, Chen Q, Ma Y, Malagoli Lanzoni I, Lam WK. An analysis of whole-body kinematics, muscle strength and activity during cross-step topspin among table tennis players. INT J PERF ANAL SPOR 2022. [DOI: 10.1080/24748668.2022.2025712] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ming-Zhu Chen
- Laboratory Management Center, Shenyang Sport University, Shenyang, China
| | - Xin Wang
- Department of Kinesiology, Shenyang Sport University, Shenyang, China
| | - Qi Chen
- Physical Education Department, The University of International Business and Economics, Beijing, China
| | - Yue Ma
- Key Laboratory of Impression Evidence Examination and Identification Technology, National Police University of China, Shenyang, China
| | - Ivan Malagoli Lanzoni
- Department of Biomedical and Neuromotor Sciences, Bologna University, Bologna, Italy
| | - Wing-Kai Lam
- Department of Kinesiology, Shenyang Sport University, Shenyang, China
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Creating a Scoring System with an Armband Wearable Device for Table Tennis Forehand Loop Training: Combined Use of the Principal Component Analysis and Artificial Neural Network. SENSORS 2021; 21:s21113870. [PMID: 34205215 PMCID: PMC8200036 DOI: 10.3390/s21113870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/28/2021] [Accepted: 06/01/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND This study presents an intelligent table tennis e-training system based on a neural network (NN) model that recognizes data from sensors built into an armband device, with the component values (performances scores) estimated through principal component analysis (PCA). METHODS Six expert male table tennis players on the National Youth Team (mean age 17.8 ± 1.2 years) and seven novice male players (mean age 20.5 ± 1.5 years) with less than 1 year of experience were recruited into the study. Three-axis peak forearm angular velocity, acceleration, and eight-channel integrated electromyographic data were used to classify both player level and stroke phase. Data were preprocessed through PCA extraction from forehand loop signals. The model was trained using 160 datasets from five experts and five novices and validated using 48 new datasets from one expert and two novices. RESULTS The overall model's recognition accuracy was 89.84%, and its prediction accuracies for testing and new data were 93.75% and 85.42%, respectively. Principal components corresponding to the skills "explosive force of the forearm" and "wrist muscle control" were extracted, and their factor scores were standardized (0-100) to score the skills of the players. Assessment results indicated that expert scores generally fell between 60 and 100, whereas novice scores were less than 70. CONCLUSION The developed system can provide useful information to quantify expert-novice differences in fore-hand loop skills.
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The Biomechanics of Shoulder Movement with Implications for Shoulder Injury in Table Tennis: A Minireview. Appl Bionics Biomech 2021; 2021:9988857. [PMID: 34055046 PMCID: PMC8123990 DOI: 10.1155/2021/9988857] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 05/03/2021] [Indexed: 11/17/2022] Open
Abstract
A high proportion of shoulder injuries in table tennis players are common, which is both a diagnostic and therapeutic challenge. An understanding of the interaction between biomechanical function of the shoulder and mechanisms of shoulder injuries in table tennis players is necessary to prevent injury and to conduct clinical treatment of the shoulder as soon as possible. The purpose of this minireview was to select the available evidence on the biomechanical characteristics of shoulder movement and potential relationships with various shoulder injuries that are common in table tennis players. Five studies revealed interesting biomechanical characteristics of shoulder movement patterns in table tennis players: large internal rotation torque, an increased torsion-rotation movement, and a greater angular velocity of internal rotation were found. Two studies were noted that were related to specific shoulder injury: glenohumeral internal rotation deficit (GIRD) and impingement syndrome. Unfortunately, it is difficult to draw conclusions on the mechanisms of shoulder injury in table tennis players due to the little evidence available that has investigated shoulder injury mechanisms based on biomechanical characteristics. Future studies should focus on the potential relationship between the biomechanical characteristics of the shoulder and injury prevalence to provide valuable reference data for clinical treatment.
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IORDAN DA, MOCANU MD, MEREUȚĂ C, STAN Z, MOCANU GD, ONU I. Quantifying the functional diagnosis in the rehabilitation of postural problems of biomechanical junior female players in table tennis. BALNEO AND PRM RESEARCH JOURNAL 2021. [DOI: 10.12680/balneo.2021.419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Abstract
We have lived in an era in sports history in which due to the intensity of the confrontations between athletes, disorders manifested by headaches, shoulder, pelvis and knee aches etc. appear more often. The performers during puberty require special attention on their morpho – functional development from the kynesiotherapist who is part of the multidisciplinary team, due to many transformations of the human body specific at this age category. 13 juniors female athletes have participated to the study, being assessed anthropometric, plantar pressures and posture with softwear FreeStep by Sensor Medica, biomechanical analysis and from technical & tactical point of view by 5 tests with DartFish 360S. Within the statistical – mathematical analysis, we have used Pearson correlation coefficient which favoured the identification of the strongest correlations resulted from the technical – tactical - anthropometric – plantar pressures and postural unbalances (r > 1.00 at test 1 and r > 0.84 at test 2). Assumption: It is assumed that by using established methods and means to assess postural deficiencies and to assess the level of consolidation of the topspin attack, we can identify the correlations between them which would facilitate the creation in the future of an efficient postural improvement program. The goal is to improve the quality of life and sports performance in junior female table tennis players. The conclusions of this study demonstrate the fact that the mobility of the spine in frontal plan, high thoracic elasticity and an increased lateral mobility on the opposite side of the active arm represent advantages intended to optimize the attack by topspin, while the supraponderability, the pain in lumber area and the shoulder’s asymmetry constitute disruptive factors of attack’s performance.
Keywords: plantar pressures, postural unbalances, baropodometric platforms, topsin attack efficiency, dartfish 360s,
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Affiliation(s)
- Daniel-Andrei IORDAN
- “Dunărea de Jos” University, Faculty of Physical Education and Sports, Galați, România
| | - Mircea-Dan MOCANU
- “Dunărea de Jos” University, Faculty of Physical Education and Sports, Galați, România
| | - Claudiu MEREUȚĂ
- “Dunărea de Jos” University, Faculty of Physical Education and Sports, Galați, România
| | - Zenovia STAN
- “Dunărea de Jos” University, Faculty of Physical Education and Sports, Galați, România
| | - George-Dănuț MOCANU
- “Dunărea de Jos” University, Faculty of Physical Education and Sports, Galați, România
| | - Ilie ONU
- "Grigore T. Popa" University of Medicine and Pharmacy of Iasi, Faculty of Medical Bioengineering, Iasi, România
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McKenna LJ, Bonnett L, Panzich K, Lim J, Hansen SK, Graves A, Jacques A, Williams SA. The Addition of Real-time Ultrasound Visual Feedback to Manual Facilitation Increases Serratus Anterior Activation in Adults With Painful Shoulders: A Randomized Crossover Trial. Phys Ther 2021; 101:6039319. [PMID: 33336703 DOI: 10.1093/ptj/pzaa208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 10/07/2020] [Accepted: 10/26/2020] [Indexed: 01/04/2023]
Abstract
OBJECTIVE Serratus anterior (SA) muscle activation may be decreased with subacromial pain syndrome. The purpose of this study was to determine whether the addition of real-time ultrasound (RTUS) visual feedback increased activation of SA in adults with painful shoulders in comparison to manual facilitation alone. METHODS This assessor-blinded, 2-period, randomized cross-over trial was conducted in a university medical imaging laboratory. Adults with mild-moderate unilateral subacromial pain received both interventions in random order with at least 1-week washout between interventions. Fourteen participants were randomized to receive manual facilitation with RTUS first, and 13 were randomized to receive manual facilitation alone first. Fifteen repetitions of a supine ``serratus punch'' were facilitated by RTUS visual feedback with manual facilitation or by manual facilitation alone. Levels of SA activation via surface electromyography were normalized to a maximum voluntary isometric contraction. RESULTS A total of 25 participants completed the full trial of both interventions. Data from 25 participant periods for RTUS with manual facilitation and data from 26 participant periods for manual facilitation only were analyzed. The predicted marginal mean difference between interventions was 55.5% (95% CI = 13.9% to 97.1%) in favor of the addition of RTUS feedback. No adverse effects occurred. CONCLUSION RTUS visual feedback increases SA activation in adults with painful shoulders compared with manual facilitation alone. IMPACT Determining if RTUS can improve SA muscle activation may help clinicians improve physical therapist interventions for subacromial pain syndrome.
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Affiliation(s)
- Leanda J McKenna
- School of Physiotherapy and Exercise Science, Curtin University, Perth, Australia
| | - Luke Bonnett
- School of Physiotherapy and Exercise Science, Curtin University, Perth, Australia
| | - Kelly Panzich
- School of Physiotherapy and Exercise Science, Curtin University, Perth, Australia
| | - Jacinta Lim
- School of Physiotherapy and Exercise Science, Curtin University, Perth, Australia
| | - Snorre K Hansen
- School of Physiotherapy and Exercise Science, Curtin University, Perth, Australia
| | - Anna Graves
- Department of Medical Imaging, Curtin University, Perth, Australia
| | - Angela Jacques
- School of Physiotherapy and Exercise Science, Curtin University, Perth, Australia
| | - Sian A Williams
- School of Physiotherapy and Exercise Science, Curtin University, Perth, Australia.,Department of Surgery and Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
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Do surface electrodes validly represent lower trapezius activation patterns during shoulder tasks? J Electromyogr Kinesiol 2020; 53:102427. [PMID: 32470865 DOI: 10.1016/j.jelekin.2020.102427] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 02/27/2020] [Accepted: 05/07/2020] [Indexed: 11/21/2022] Open
Abstract
Because of its superficial location, surface electrodes are commonly used to record lower trapezius activity. Recent evidence, however, would suggest that surface electromyography is not a valid to record activity from other superficially placed shoulder muscles. Therefore, the aim of this study was to determine the validity of using surface electrodes to record lower trapezius activity. Ten asymptomatic subjects performed ramped isometric (0-100% maximum load) and dynamic (70% maximum load) shoulder tasks. Intramuscular electrodes were inserted into lower trapezius and rhomboid major. Surface electrodes were placed over lower trapezius around the intramuscular electrodes. Differences in the recorded activity of lower trapezius between surface and intramuscular electrodes were tested using a 2 factor repeated measures analysis of variance with factors: test and electrode type. Similarity in the recorded activity patterns between the two electrodes was tested using Pearson's correlation coefficient (r). Results indicated that there was no difference in lower trapezius activity levels (p = 0.98) or activation patterns (r ≥ 0.74) recorded by the intramuscular and surface electrodes. The results of this study indicate that any potential crosstalk contamination in the surface electrode signal is having little influence on the recorded activity from lower trapezius and therefore, support the common practice of surface electromyography to investigate lower trapezius function.
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13
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Biomechanics of Table Tennis: A Systematic Scoping Review of Playing Levels and Maneuvers. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10155203] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
This present study aims to review the available evidence on the biomechanics of table-tennis strokes. Specifically, it summarized current trends, categorized research foci, and biomechanical outcomes regarding various movement maneuvers and playing levels. Databases included were Web of Science, Cochrane Library, Scopus, and PubMed. Twenty-nine articles were identified meeting the inclusion criteria. Most of these articles revealed how executing different maneuvers changed the parameters related to body postures and lines of movement, which included racket face angle, trunk rotation, knee, and elbow joints. It was found that there was a lack of studies that investigated backspin maneuvers, longline maneuvers, strikes against sidespin, and pen-hold players. Meanwhile, higher-level players were found to be able to better utilize the joint power of the shoulder and wrist joints through the full-body kinetic chain. They also increased plantar pressure excursion in the medial-lateral direction, but reduced in anterior-posterior direction to compromise between agility and dynamic stability. This review identified that most published articles investigating the biomechanics of table tennis reported findings comparing the differences among various playing levels and movement tasks (handwork or footwork), using ball/racket speed, joint kinematics/kinetics, electromyography, and plantar pressure distribution. Systematically summarizing these findings can help to improve training regimes in order to attain better table tennis performance.
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