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Turner C, Goubault E, Maso FD, Begon M, Verdugo F. The influence of proximal motor strategies on pianists' upper-limb movement variability. Hum Mov Sci 2023; 90:103110. [PMID: 37295318 DOI: 10.1016/j.humov.2023.103110] [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: 02/20/2023] [Revised: 05/24/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
Repetitive movements are considered a risk factor for developing practice-related musculoskeletal disorders. Intra-participant kinematic variability might help musicians reduce the risk of injury during repetitive tasks. No research has studied the effects of proximal motion (i.e., trunk and shoulder movement) on upper-limb movement variability in pianists. The first objective was to determine the effect of proximal movement strategies and performance tempo on both intra-participant joint angle variability of upper-limb joints and endpoint variability. The second objective was to compare joint angle variability between pianist's upper-limb joints. As secondary objectives, we assessed the relationship between intra-participant joint angle variability and task range of motion (ROM) and documented inter-participant joint angle variability. The upper body kinematics of 9 expert pianists were recorded using an optoelectronic system. Participants continuously performed two right-hand chords (lateral leap motions) while changing movements based on trunk motion (with and without) and shoulder motion (counter-clockwise, back-and-forth, and clockwise) at two tempi (slow and fast). Trunk and shoulder movement strategies collectively influenced variability at the shoulder, elbow and, to a lesser extent, the wrist. Slow tempi led to greater variability at wrist and elbow flexion/extension compared to fast tempi. Endpoint variability was influenced only along the anteroposterior axis. When the trunk was static, the shoulder had the lowest joint angle variability. When trunk motion was used, elbow and shoulder variability increased, and became comparable to wrist variability. ROM was correlated with intra-participant joint angle variability, suggesting that increased task ROM might result in increased movement variability during practice. Inter-participant variability was approximately six times greater than intra-participant variability. Pianists should consider incorporating trunk motion and a variety of shoulder movements as performance strategies while performing leap motions at the piano, as they might reduce exposure to risks of injury.
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Affiliation(s)
- Craig Turner
- Laboratoire de Simulation et Modélisation du Mouvement, École de Kinésiologie et des Sciences de l'Activité Physique, Université de Montréal, Québec, Canada.
| | - Etienne Goubault
- Laboratoire de Simulation et Modélisation du Mouvement, École de Kinésiologie et des Sciences de l'Activité Physique, Université de Montréal, Québec, Canada
| | - Fabien Dal Maso
- Laboratoire de Simulation et Modélisation du Mouvement, École de Kinésiologie et des Sciences de l'Activité Physique, Université de Montréal, Québec, Canada; Centre interdisciplinaire de recherche sur le cerveau et l'apprentissage, Montréal, Québec, Canada
| | - Mickaël Begon
- Laboratoire de Simulation et Modélisation du Mouvement, École de Kinésiologie et des Sciences de l'Activité Physique, Université de Montréal, Québec, Canada; Sainte-Justine Hospital Research Center, Montreal, Québec, Canada
| | - Felipe Verdugo
- Laboratoire de Simulation et Modélisation du Mouvement, École de Kinésiologie et des Sciences de l'Activité Physique, Université de Montréal, Québec, Canada; Faculté de musique, Université de Montréal, Montréal, Québec, Canada
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2
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Singh C, Martinez CMJ, Jayadas A. Assessment of Perceived Discomfort in Older Women with and without Osteoarthritis and Young Women When Reaching for Items on Different Shelf Heights. JOURNAL OF AGING AND ENVIRONMENT 2022. [DOI: 10.1080/26892618.2022.2109791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Chitra Singh
- Department of Family and Consumer Sciences, Western Michigan University, Kalamazoo, MI, USA
| | | | - Aditya Jayadas
- Department of Design Housing and Merchandising, Oklahoma State University, Stillwater, OK, USA
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Artiga O, Bucy A, Qiu R, Cramer E, Raney M. Functional training improves the effectiveness of stretching programs for university cleaning staff. INTERNATIONAL JOURNAL OF WORKPLACE HEALTH MANAGEMENT 2022. [DOI: 10.1108/ijwhm-05-2021-0112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PurposeThe purpose of this study was to determine whether combining a structured stretching program with functional movement/body position training would yield additive effects on flexibility, ergonomic practices, and subjective pain levels for employees at high risk for work-related musculoskeletal disorders.Design/methodology/approachNine control and 13 experimental university cleaning staff participated in a 10-week full-body stretching intervention led by undergraduate students. Experimental participants also engaged in functional movement/body position training once per week. Joint range of motion, task ergonomic form, pain level, and stretching motivation results were compared pre- and post-intervention.FindingsOverall flexibility (+25.75 ± 3.33%) and task ergonomic form (+26.3 ± 10.5%) significantly improved and were negatively correlated with pain levels (r = −0.541 and r = −0.317, respectively). Experimental participants experienced greater improvements in shoulder (control: +16.8 ± 9.0%; experimental: +64.2 ± 11.5%) and hip (control: +31.4 ± 9.9%; experimental: +91.2 ± 19.9%) flexibility as well as in task-specific ergonomic form for vertical (control: +0.0 ± 5.3%; experimental: +35.2 ± 10.1%) and horizontal wiping (control: −4.7 ± 4.7%; experimental: +29.0 ± 7.8%). Intrinsic motivation was increased for both groups (+26.2 ± 15.4%).Originality/valueSupplementing a workplace stretching program with functional movement/body position training has the potential to improve flexibility and decrease pain while simultaneously increasing the likelihood that cleaning staff will participate in self-directed stretching in the future. The intervention serves as a model for workplace health management and wellness-focused community building on university campuses who insource cleaning staff.
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Savin J, Gaudez C, Gilles MA, Padois V, Bidaud P. Evidence of movement variability patterns during a repetitive pointing task until exhaustion. APPLIED ERGONOMICS 2021; 96:103464. [PMID: 34098407 DOI: 10.1016/j.apergo.2021.103464] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 05/06/2021] [Accepted: 05/11/2021] [Indexed: 06/12/2023]
Abstract
Human movement is characterized by its variability: the same task is never performed twice in exactly the same way. This variability is believed to play a functional role in movement performance and adaptability, as well as in preventing musculoskeletal damage. This article focuses on the time-evolution of movement variability throughout a repetitive pointing task until exhaustion. The kinematics of 13 subjects performing the pointing task is analyzed. Principal Component Analysis of joint angles identifies joint coordinations for each pointing cycle, and cycle-by-cycle comparison highlights movement variability. Non-supervised clustering reveals that subjects adopt successive coordination patterns at an intra-individual level. Inter-individual variability is characterized by the number and type of such patterns: from 3 to 5 patterns, mobilizing the trunk, the shoulder and the upper limbs differently. Movement variability exists even in a seemingly basic and constrained task. It appears in the very early stages of fatigue onset, and may correspond to adaptative coordination responses throughout task performance. This observation should encourage workstation designers to better account for movement variability in order to preserve operators' health and safety.
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Affiliation(s)
- J Savin
- INRS, F-54500 Vandœuvre-lès-Nancy, France.
| | - C Gaudez
- INRS, F-54500 Vandœuvre-lès-Nancy, France
| | - M A Gilles
- INRS, F-54500 Vandœuvre-lès-Nancy, France
| | - V Padois
- Auctus, INRIA-IMS, CNRS UMR 5218, Université de Bordeaux, F-33400 Talence, France
| | - P Bidaud
- ONERA, F-91120 Palaiseau, France
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Hasanbarani F, Yang C, Bailey CA, Slopecki M, Côté JN. Sex-specific effects of a repetitive fatiguing task on stability: Analysis with motor equivalence model. J Biomech 2021; 129:110769. [PMID: 34607280 DOI: 10.1016/j.jbiomech.2021.110769] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 08/18/2021] [Accepted: 09/19/2021] [Indexed: 10/20/2022]
Abstract
Although studies showed that several internal factors affect task-specific stability, the sex-specific effects of fatigue on whole-limb stability during a semi-cycle repetitive pointing task remain unidentified. Synergy and Motor Equivalence concepts in the UCM framework have been developed to explain task-specific stability. The motor equivalence model quantifies the amount of deviation in the space of elemental variables that occurs in two directions; one that preserves the performance variable (good variance), and the other that affects it (bad variance). Synergy index (the difference between good and bad variance divided by the total variance > 0) represent stability in performing a task. Healthy adults (n = 26, 13F; age: 35.3 ± 10.6 yrs.) performed an RPT by moving their dominant arm between a proximal target and a distal target in a standing position until near fatigue (Borg CR10 rating 8/10). Tridimensional kinematics of trunk, upper arm, forearm, and hand segments were captured by high-resolution cameras every minute, and joint angles were extracted according to the ZX'Y″ Euler sequence. Results showed the synergy > 0 for both women and men, reflecting synergies stabilizing the endpoint coordinate in both Non-Fatigue and Fatigue conditions. Statistics (ANOVA) showed a significant Condition * Sex effect (p = 0.01), with higher good (by 0.19 ± 0.1 rad) and bad variances (by 0.15 ± 0.09 rad) in women compared to men after fatigue. Higher good and bad variability, with no change in women's performance could represent a less stable strategy, leading to the development of risk factors for neck-shoulder disorders.
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Affiliation(s)
- Fariba Hasanbarani
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, QC H7V 1R2, Canada.
| | - Chen Yang
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, QC H7V 1R2, Canada
| | - Christopher A Bailey
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, QC H7V 1R2, Canada
| | - Matthew Slopecki
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, QC H7V 1R2, Canada
| | - Julie N Côté
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, QC H7V 1R2, Canada
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Fox AS, Bonacci J, Gill SD, Page RS. Simulating the effect of glenohumeral capsulorrhaphy on kinematics and muscle function. J Orthop Res 2021; 39:880-890. [PMID: 33241584 DOI: 10.1002/jor.24908] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 10/21/2020] [Accepted: 11/08/2020] [Indexed: 02/04/2023]
Abstract
This study aimed to use a predictive simulation framework to examine shoulder kinematics, muscular effort, and task performance during functional upper limb movements under simulated selective glenohumeral capsulorrhaphy. A musculoskeletal model of the torso and upper limb was adapted to include passive restraints that simulated the changes in shoulder range of motion stemming from selective glenohumeral capsulorrhaphy procedures (anteroinferior, anterosuperior, posteroinferior, posterosuperior, and total anterior, inferior, posterior, and superior). Predictive muscle-driven simulations of three functional movements (upward reach, forward reach, and head touch) were generated with each model. Shoulder kinematics (elevation, elevation plane, and axial rotation), muscle cost (i.e., muscular effort), and task performance time were compared to a baseline model to assess the impact of the capsulorrhaphy procedures. Minimal differences in shoulder kinematics and task performance times were observed, suggesting that task performance could be maintained across the capsulorrhaphy conditions. Increased muscle cost was observed under the selective capsulorrhaphy conditions, however this was dependent on the task and capsulorrhaphy condition. Larger increases in muscle cost were observed under the capsulorrhaphy conditions that incurred the greatest reductions in shoulder range of motion (i.e., total inferior, total anterior, anteroinferior, and total posterior conditions) and during tasks that required shoulder kinematics closer to end range of motion (i.e., upward reach and head touch). The elevated muscle loading observed could present a risk to joint capsule repair. Appropriate rehabilitation following glenohumeral capsulorrhaphy is required to account for the elevated demands placed on muscles, particularly when a significant range of motion loss presents.
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Affiliation(s)
- Aaron S Fox
- Centre for Sport Research, School of Exercise and Nutrition Sciences, Deakin University, Geelong, Australia.,Barwon Centre for Orthopaedic Research and Education (B-CORE), Barwon Health, St John of God Hospital, Deakin University, Geelong, Australia
| | - Jason Bonacci
- Centre for Sport Research, School of Exercise and Nutrition Sciences, Deakin University, Geelong, Australia
| | - Stephen D Gill
- Barwon Centre for Orthopaedic Research and Education (B-CORE), Barwon Health, St John of God Hospital, Deakin University, Geelong, Australia.,School of Medicine, Deakin University, Geelong, Australia.,Orthopaedic Department, University Hospital Geelong, Barwon Health, Geelong, Australia
| | - Richard S Page
- Barwon Centre for Orthopaedic Research and Education (B-CORE), Barwon Health, St John of God Hospital, Deakin University, Geelong, Australia.,School of Medicine, Deakin University, Geelong, Australia.,Orthopaedic Department, University Hospital Geelong, Barwon Health, Geelong, Australia
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7
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Kulich HR, Bass SR, Griscavage JS, Vijayvargiya A, Slowik JS, Koontz AM. An ergonomic comparison of three different patient transport chairs in a simulated hospital environment. APPLIED ERGONOMICS 2020; 88:103172. [PMID: 32678780 DOI: 10.1016/j.apergo.2020.103172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 05/15/2020] [Accepted: 05/20/2020] [Indexed: 06/11/2023]
Abstract
The purpose of this study was to compare caregiver muscle activation and joint angles between two ergonomic transport chairs designed to mitigate discomfort and safety risks associated with patient transport, the Stryker® Prime TC and the Staxi® Medical Chair, and a depot wheelchair. Twenty-three caregivers completed level walking and ramped tasks with each device and an 84 kg manikin. Surface electromyography for the upper extremities and back muscles and motion data were collected. The Staxi showed a statistical trend for higher wrist extensor and flexor carpi ulnaris activity compared to the Stryker chair (p ≤ 0.078) and greater wrist flexion than the Stryker and depot chairs (p ≤ 0.004). The depot chair showed greater peak trunk flexion than the Stryker chair (p = 0.004). Overall results suggest that ergonomic chair design may improve joint positioning of the trunk and elbows when operating patient transport chairs over level and ramped surfaces.
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Affiliation(s)
- Hailee R Kulich
- Human Engineering Research Laboratories, VA Pittsburgh Healthcare System, Pittsburgh, PA, USA; Department of Rehabilitation Science and Technology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sarah R Bass
- Human Engineering Research Laboratories, VA Pittsburgh Healthcare System, Pittsburgh, PA, USA; Department of Rehabilitation Science and Technology, University of Pittsburgh, Pittsburgh, PA, USA
| | | | | | - Jonathan S Slowik
- Human Engineering Research Laboratories, VA Pittsburgh Healthcare System, Pittsburgh, PA, USA; Department of Rehabilitation Science and Technology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Alicia M Koontz
- Human Engineering Research Laboratories, VA Pittsburgh Healthcare System, Pittsburgh, PA, USA; Department of Rehabilitation Science and Technology, University of Pittsburgh, Pittsburgh, PA, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.
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8
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Mulla DM, McDonald AC, Keir PJ. Joint moment trade-offs across the upper extremity and trunk during repetitive work. APPLIED ERGONOMICS 2020; 88:103142. [PMID: 32421639 DOI: 10.1016/j.apergo.2020.103142] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 04/28/2020] [Accepted: 05/01/2020] [Indexed: 06/11/2023]
Abstract
Individuals can coordinate small kinematic changes at several degrees of freedom simultaneously in the presence of fatigue, leaving it unclear how overall biomechanical demands at each joint are altered. The purpose of this study was to evaluate trade-offs in joint moments between the trunk, shoulder, and elbow during repetitive upper extremity work. Participants performed four simulated workplace tasks cyclically until meeting fatigue termination criteria. Emergent fatigue-induced adaptations to repetitive work resulted in task-dependent trade-offs in joint moments. In general, reduced shoulder moments were compensated for by increased elbow and trunk joint moment contributions. Although mean joint moment changes were modest (range: 1-3 Nm) across participants, a wide distribution of responses was observed, with standard deviations exceeding 10 Nm. Re-distributing biomechanical demands across joints may alleviate constant tissue loads and facilitate continued task performance with fatigue but may be at the expense of increasing demands at adjacent joints.
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Affiliation(s)
- Daanish M Mulla
- Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - Alison C McDonald
- Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - Peter J Keir
- Department of Kinesiology, McMaster University, Hamilton, ON, Canada.
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9
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Yang C, Leitkam S, Côté JN. Effects of different fatigue locations on upper body kinematics and inter-joint coordination in a repetitive pointing task. PLoS One 2019; 14:e0227247. [PMID: 31891644 PMCID: PMC6938350 DOI: 10.1371/journal.pone.0227247] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 12/16/2019] [Indexed: 11/18/2022] Open
Abstract
Studies have shown that muscle fatigue can lead to posture, joint angle, inter-joint coordination and variability alterations. However, the three-dimensional kinematic effects of localized muscular fatigue on a multijoint movement remain unclear. Healthy young adults (N = 17, 10 females) performed a standing repetitive pointing task when they were non-fatigued, and after localized muscle fatigue was induced at the elbow, the shoulder, and the trunk using isometric protocols performed until exhaustion. Joint angles and angular standard deviation (SD) of trunk, shoulder and elbow, and continuous relative phase (CRP) and CRP SD between trunk and shoulder, and shoulder and elbow were computed and compared between fatigue conditions. Results showed that trunk lateral flexion SD increased after fatigue of the elbow (0.1°, p = 0.04), shoulder (0.1°, p = 0.04) and trunk (0.1°, p<0.01). However, fatigue at different muscles brought different kinematic changes. Shoulder fatigue induced the greatest overall changes, with angular changes at all three joints. Trunk fatigue increased the shoulder horizontal abduction SD, elbow flexion SD and trunk-shoulder CRP. Elbow fatigue induced angular changes at trunk, shoulder and elbow, but did not affect CRP or CRP SD. This study highlights the crucial role of trunk variability in compensating for localized muscle fatigue during a repetitive upper limb task performed while standing.
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Affiliation(s)
- Chen Yang
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
- Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, Quebec, Canada
- * E-mail:
| | - Samuel Leitkam
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
- Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, Quebec, Canada
| | - Julie N. Côté
- Department of Kinesiology and Physical Education, McGill University, Montreal, Quebec, Canada
- Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, Quebec, Canada
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Lang AE, Dickerson CR, Kim SY, Stobart J, Milosavljevic S. Impingement pain affects kinematics of breast cancer survivors in work-related functional tasks. Clin Biomech (Bristol, Avon) 2019; 70:223-230. [PMID: 31669920 DOI: 10.1016/j.clinbiomech.2019.10.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 10/08/2019] [Accepted: 10/10/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Breast cancer survivors may encounter upper limb morbidities post-surgery. It is currently unclear how these impairments affect arm kinematics, particularly during functional task performance. This investigation examined upper body kinematics during functional tasks for breast cancer survivors and an age-matched control group. METHODS Fifty women (aged 35-65) participated: 25 breast cancer survivors who had undergone mastectomy and 25 age-range matched controls. Following basic clinical evaluation, including shoulder impingement tests, motion of the torso and upper limbs were tracked during six upper limb-focused functional tasks from which torso, scapular, and thoracohumeral angles were calculated. Between-group differences were evaluated with independent t-tests (p < .05). The breast cancer group was then divided based upon impingement tests and differences between the three new groups were tested with one-way ANOVAs (p < .05). FINDINGS Breast cancer survivors had higher disability scores, lower range of motion, and lower performance scores. The largest kinematic differences existed between the breast cancer survivors with impingement pain and the two non-pain groups. During overhead tasks, right peak scapular upward rotation was significantly reduced (d = 0.80-1.11) in the breast cancer survivors with impingement pain. This group also demonstrated trends of decreased peak humeral abduction and internal rotation at extreme postures (d = 0.54-0.78). These alterations are consistent with kinematics considered high risk for rotator cuff injury development. INTERPRETATION Impingement pain in breast cancer survivors influences functional task performance and may be more important to consider than self-reported disability when evaluating pain and potential injury development.
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Affiliation(s)
- Angelica E Lang
- Department of Health Sciences, College of Medicine, University of Saskatchewan, Canada
| | - Clark R Dickerson
- Department of Kinesiology, Faculty of Applied Health Sciences, University of Waterloo, Canada
| | - Soo Y Kim
- School of Rehabilitation Science, College of Medicine, University of Saskatchewan, Canada
| | - Jamie Stobart
- School of Rehabilitation Science, College of Medicine, University of Saskatchewan, Canada
| | - Stephan Milosavljevic
- School of Rehabilitation Science, College of Medicine, University of Saskatchewan, Canada.
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Pritchard SE, Tse CTF, McDonald AC, Keir PJ. Postural and muscular adaptations to repetitive simulated work. ERGONOMICS 2019; 62:1214-1226. [PMID: 31150301 DOI: 10.1080/00140139.2019.1626491] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 04/29/2019] [Indexed: 06/09/2023]
Abstract
Complex repetitive tasks are common in the workplace and have been associated with upper extremity disorders. The purpose of this study was to examine the progressive effects of highly repetitive work on joint kinematics and muscle activity of the trunk and upper extremity. Fifteen healthy men performed 60 one-minute cycles of 4 simulated automotive-related tasks. Electromyography of eight muscles and kinematics of the trunk and right upper extremity were collected. Data were analysed at 12-min intervals and divided into a complete work cycle. The time to complete the work cycle decreased by 6.3 s over the trials. Peak shoulder flexion decreased and peak elbow flexion increased during the work cycle. Muscle activity magnitude and variability was influenced by time during the repetitive tasks. This study found adaptations to highly repetitive but light work in only 1 h; redistributing muscle demands within the shoulder over time may reduce muscle fatigue development. Practitioner Summary: While the work was not strenuous, we were able to demonstrate muscular and postural adaptations in a single hour of simulated work. By evaluating both the whole work cycle and the sub-tasks, we aim to develop new methods for evaluating the risk of complex tasks in prolonged repetitive work.
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Affiliation(s)
- Samantha E Pritchard
- a Occupational Biomechanics Laboratory, Department of Kinesiology, McMaster University , Hamilton , ON , Canada
| | - Calvin T F Tse
- a Occupational Biomechanics Laboratory, Department of Kinesiology, McMaster University , Hamilton , ON , Canada
| | - Alison C McDonald
- a Occupational Biomechanics Laboratory, Department of Kinesiology, McMaster University , Hamilton , ON , Canada
| | - Peter J Keir
- a Occupational Biomechanics Laboratory, Department of Kinesiology, McMaster University , Hamilton , ON , Canada
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12
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Whittaker RL, La Delfa NJ, Dickerson CR. Algorithmically detectable directional changes in upper extremity motion indicate substantial myoelectric shoulder muscle fatigue during a repetitive manual task. ERGONOMICS 2019; 62:431-443. [PMID: 30321104 DOI: 10.1080/00140139.2018.1536808] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 06/15/2018] [Accepted: 09/18/2018] [Indexed: 06/08/2023]
Abstract
Repetitive workplace tasks are associated with fatigue-induced changes to shoulder muscular strategies, potentially altering kinematics and elevating susceptibility to tissue overexposures. Accessible and reliable methods to detect shoulder muscle fatigue in the workplace are therefore valuable. Detectable changes in joint motion may provide a plausible fatigue identification method. In this investigation, the onset of the first kinematic changes, as identified by a symbolic motion representation (SMSR) algorithm, and the onset of substantial surface electromyography (sEMG) mean power frequency (MPF) fatigue were not significantly different, both occurring around 10% of task duration. This highlights the potential utility of SMSR identified directional changes in joint motion during repetitive tasks as a cue of substantial muscle fatigue, enabling ergonomics responses that can mitigate shoulder muscular fatigue accumulation and its associated deleterious physical effects. Practitioner Summary: The onset of substantial muscle fatigue during a repetitive dynamic task was assessed using kinematics and myoelectric-based techniques. Algorithmically detectable directional changes in upper extremity joint motion occurred with the onset of substantial muscle fatigue, highlighting the potential of this as a useful approach for workplace fatigue identification.
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Affiliation(s)
- Rachel L Whittaker
- a Department of Kinesiology, Faculty of Applied Health Sciences, University of Waterloo, Waterloo, Ontario, Canada
| | - Nicholas J La Delfa
- b Faculty of Health Sciences, University of Ontario Institute of Technology, Oshawa, Ontario, Canada
| | - Clark R Dickerson
- a Department of Kinesiology, Faculty of Applied Health Sciences, University of Waterloo, Waterloo, Ontario, Canada
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13
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Cid MM, Oliveira AB, Januario LB, Côté JN, de Fátima Carreira Moreira R, Madeleine P. Are there sex differences in muscle coordination of the upper girdle during a sustained motor task? J Electromyogr Kinesiol 2019; 45:1-10. [PMID: 30684823 DOI: 10.1016/j.jelekin.2019.01.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 01/13/2019] [Indexed: 11/26/2022] Open
Abstract
PURPOSE The higher prevalence of work-related musculoskeletal disorders among women compared with men could be explained by sex-gender differences related to biological and physiological processes. The aim of this study was to evaluate sex differences in motor coordination during a sustained and repetitive motor task. METHODS Seventeen healthy females and 21 healthy males participated. The surface electromyography (sEMG) of the trapezius portions and serratus anterior were recorded. Root mean square (RMS) values were computed to assess the level of muscle activity. The standard deviation (SD) and coefficient of variation (CV) were computed as metrics of size of variability. The normalized mutual information (NMI) values were calculated as index of functional connectivity between muscles pairs. RESULTS Females had higher normalized RMS values for the upper trapezius (acromial fibers) and serratus anterior muscles compared with males. RMS decreased, SD and CV increased while NMI decreased for almost all muscle pairs over time. CONCLUSION The present work showed some signs of sex differences in muscle coordination of the shoulder girdle during a sustained motor task, performed with the upper limb positioned below of the shoulder level.
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Affiliation(s)
- Marina Machado Cid
- Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310, São Carlos, São Paulo, Brazil
| | - Ana Beatriz Oliveira
- Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310, São Carlos, São Paulo, Brazil.
| | - Leticia Bergamin Januario
- Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310, São Carlos, São Paulo, Brazil
| | - Julie N Côté
- Department of Kinesiology and Physical Education, McGill University, 475 Pine Avenue West, Montreal, Quebec H2W 1S4, Canada
| | - Roberta de Fátima Carreira Moreira
- Laboratory of Clinical and Occupational Kinesiology (LACO), Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310, São Carlos, São Paulo, Brazil
| | - Pascal Madeleine
- Laboratory for Ergonomics and Work-related Disorders, Sport Sciences, Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7 D-3, 9220 Aalborg East, Denmark
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14
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Rui LH, Cheung TWC, Zixian Y, Pratt AL. A pilot study: Exploring the musculoskeletal risk exposure associated with drying laundry using the public housing pipe-socket system amongst women in Singapore. Work 2018; 61:449-461. [PMID: 30373988 DOI: 10.3233/wor-182809] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND The biomechanics of homemakers has been minimally studied. The way laundry-drying is performed in Singapore public-housing, using the pipe-socket-system (PSS), could expose the homemakers to musculoskeletal disorder risk. OBJECTIVE This study aims to quantify the musculoskeletal risk exposure (MRE) associated with laundry-drying amongst female homemakers using the PSS in Singapore public-housing. METHODS Using snowball sampling approach, five female homemakers familiar with the described laundry-drying method were recruited. The postures of the participants were analysed from video-recorded data and scored using the Rapid Entire Body Assessment (REBA). RESULTS This pilot study revealed very strong evidence (p = 0.001) that the participants were exposed to medium risk (REBA score 4.3) when performing this housework task. CONCLUSIONS Extreme awkward postures and repetitive motions were observed from the participants during the analysis. High REBA scores were frequently associated with the awkward postures adopted due to constraints of physical work space.
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Affiliation(s)
- Lee Hong Rui
- Department of Occupational Therapy, Singapore General Hospital, Singapore
| | | | - Yang Zixian
- Department of Occupational Therapy, Singapore General Hospital, Singapore
| | - Anna L Pratt
- Division of Occupational Therapy and Clinical Nursing, Brunel University London, UK
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15
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Yang C, Bouffard J, Srinivasan D, Ghayourmanesh S, Cantú H, Begon M, Côté JN. Changes in movement variability and task performance during a fatiguing repetitive pointing task. J Biomech 2018; 76:212-219. [PMID: 29908654 DOI: 10.1016/j.jbiomech.2018.05.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 05/12/2018] [Accepted: 05/30/2018] [Indexed: 11/26/2022]
Abstract
Changes in neuromuscular strategies employed with fatigue during multi-joint movements are still poorly understood. Studies have shown that motor variability of individual joints increases when performing upper limb tasks to fatigue, while movement parameters related to the task goal remain constant. However, how the inter-limb coordination and its variability change during specific movement phases with fatigue is still unclear. The aim of this study was to assess the effects of neck-shoulder fatigue on shoulder and elbow kinematic variabilities, shoulder-elbow coordination and its variability, and endpoint characteristics during different phases of a forward pointing movement. Nineteen healthy young adults continuously performed a repetitive pointing task until fatigue (Borg rating of 8/10). Changes in elbow-shoulder coordination through the movement were assessed using the continuous relative phase and statistical nonparametric mapping methods. At the end of the task, muscle fatigue was evidenced by significant increases in anterior deltoid (+13%) and biceps brachii (+30%) activity. Shoulder horizontal abduction, elbow flexion variability and shoulder-elbow coordination variability were increased with fatigue at different moments of the movement cycle (shoulder: during the first 17% and most of the second half movement, elbow: from 73% to 91%, coordination: almost the whole movement). However, movement timing errors and endpoint spatial variability were mostly preserved, even with fatigue. We showed that increased variability with fatigue is not only observed in the fatigued joint (shoulder), but also in the elbow and shoulder-elbow coordination, and may have a goal of preserving global task performance.
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Affiliation(s)
- Chen Yang
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, QC H7V 1R2, Canada.
| | - Jason Bouffard
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, QC H7V 1R2, Canada; Laboratoire de simulation et modélisation du mouvement, Département de kinésiologie, Université de Montréal, Laval, QC H7N 0A5, Canada
| | - Divya Srinivasan
- Grado Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Shaheen Ghayourmanesh
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, QC H7V 1R2, Canada
| | - Hiram Cantú
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, QC H7V 1R2, Canada
| | - Mickaël Begon
- Laboratoire de simulation et modélisation du mouvement, Département de kinésiologie, Université de Montréal, Laval, QC H7N 0A5, Canada
| | - Julie N Côté
- Department of Kinesiology and Physical Education, McGill University, Montreal, QC H2W 1S4, Canada; Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, QC H7V 1R2, Canada
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16
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Bouffard J, Yang C, Begon M, Côté J. Sex differences in kinematic adaptations to muscle fatigue induced by repetitive upper limb movements. Biol Sex Differ 2018; 9:17. [PMID: 29673397 PMCID: PMC5907702 DOI: 10.1186/s13293-018-0175-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 04/06/2018] [Indexed: 11/10/2022] Open
Abstract
Background Muscle fatigue induced by repetitive movements contributes to the development of musculoskeletal disorders. Men and women respond differently to muscle fatigue during isometric single-joint efforts, but sex differences during dynamic multi-joint tasks have not been clearly identified. Moreover, most studies comparing men and women during fatigue development assessed endurance time. However, none evaluated sex differences in kinematic adaptations to fatigue during multi-joint dynamic tasks. The objective of the study was to compare how men and women adapt their upper body kinematics during a fatiguing repetitive pointing task. Methods Forty men and 41 women performed repetitive pointing movements (one per second) between two targets while maintaining their elbow elevated at shoulder height. The task ended when participants rated a perceived level of fatigue of 8/10. Trunk, humerothoracic, and elbow angles were compared between the first and last 30 s of the experiment and between men and women. Linear positions of the index finger (distance from the target) and the elbow (arm elevation) as well as movement timing were documented as task performance measures. Results Men (7.4 ± 3.2 min) and women (8.3 ± 4.5 min) performed the repetitive pointing task for a similar duration. For both sex groups, trunk range of motion increased with fatigue while shoulder’s and elbow’s decreased. Moreover, participants modified their trunk posture to compensate for the decreased humerothoracic elevation. Movements at all joints also became more variable with fatigue. However, of the 24 joint angle variables assessed, only two Sex × Fatigue interactions were observed. Although average humerothoracic elevation angle decreased in both subgroups, this decrease was greater in men (standardized response mean [SRM] − 1.63) than in women (SRM − 1.44). Moreover, the movement-to-movement variability of humerothoracic elevation angle increased only in women (SRM 0.42). Conclusion Despite many similarities between men’s and women’s response to fatigue induced by repetitive pointing movements, some sex differences were observed. Those subtle differences may indicate that men’s shoulder muscles were more fatigued than women’s despite a similar level of perceived exertion. They may also indicate that men and women do not adapt the exact same way to a similar fatigue. Electronic supplementary material The online version of this article (10.1186/s13293-018-0175-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jason Bouffard
- Department of Kinesiology and Physical Education, McGill University, Montreal, H2W 1S4, Qc, Canada. .,Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, H7V 1R2, Qc, Canada. .,Département de kinésiologie, Université de Montréal, Laval, H7N 0A5, Qc, Canada.
| | - Chen Yang
- Department of Kinesiology and Physical Education, McGill University, Montreal, H2W 1S4, Qc, Canada.,Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, H7V 1R2, Qc, Canada
| | - Mickael Begon
- Département de kinésiologie, Université de Montréal, Laval, H7N 0A5, Qc, Canada
| | - Julie Côté
- Department of Kinesiology and Physical Education, McGill University, Montreal, H2W 1S4, Qc, Canada.,Occupational Biomechanics and Ergonomics Laboratory, Michael Feil and Ted Oberfeld/CRIR Research Centre, Jewish Rehabilitation Hospital, Laval, H7V 1R2, Qc, Canada
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17
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Xie YF, Szeto G, Madeleine P, Tsang S. Spinal kinematics during smartphone texting - A comparison between young adults with and without chronic neck-shoulder pain. APPLIED ERGONOMICS 2018; 68:160-168. [PMID: 29409630 DOI: 10.1016/j.apergo.2017.10.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 10/27/2017] [Accepted: 10/27/2017] [Indexed: 06/07/2023]
Abstract
To advance our understanding about the association between smartphone use and chronic neck-shoulder pain, the objective of this study was to compare spinal kinematics between different text-entry methods in smartphone users with and without chronic neck-shoulder pain. Symptomatic (n = 19) and healthy participants (n = 18) were recruited and they performed three tasks: texting on a smartphone with one hand, with two hands, and typing on a desktop computer. Three-dimensional kinematics were examined in the cervical, thoracic and lumbar regions for each task. This study suggests that altered kinematics may be associated with pain since significantly increased angles of cervical right side flexion during smartphone texting and greater postural changes in cervical rotation were found during all text-entry tasks in the symptomatic group. Two-handed texting was associated with increased cervical flexion while one-handed texting was correlated with an asymmetric neck posture, indicating both text-entry methods are not favorable in terms of spinal postures.
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Affiliation(s)
- Yan Fei Xie
- School of Health and Rehabilitation Science, The University of Queensland, Australia.
| | - Grace Szeto
- Department of Rehabilitation Science, The Hong Kong Polytechnic University, Hong Kong
| | - Pascal Madeleine
- Physical Activity and Human Performance Research Group, SMI, Department of Health Science and Technology, Aalborg University, Denmark
| | - Sharon Tsang
- Department of Rehabilitation Science, The Hong Kong Polytechnic University, Hong Kong
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18
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Whittaker RL, Park W, Dickerson CR. Application of a symbolic motion structure representation algorithm to identify upper extremity kinematic changes during a repetitive task. J Biomech 2018. [DOI: 10.1016/j.jbiomech.2018.02.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Lang AE, Dickerson CR. Normative kinematics of reaching and dexterity tasks: moving towards a quantitative baseline for Functional Capacity Evaluations (FCEs). Int Biomech 2017. [PMCID: PMC7857447 DOI: 10.1080/23335432.2017.1326843] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Purpose: This work generates a comprehensive description of upper extremity and torso kinematics of a healthy population during reaching and dexterity Functional Capacity Evaluation (FCE) tasks. Methods: Upper limb and torso kinematic data were collected from 30 young, healthy participants as they performed three common FCE tasks: repetitive reaching, fingertip dexterity, and hand and forearm dexterity. Kinematic profiles were created for all clinically relevant angles of the torso, shoulder, elbow, and wrist. Results: These provocative tasks require large ranges of motion and create high demand postures for the upper limb, specifically at the shoulder. Arm elevation was up to 90°, while humeral internal rotation of 25° was observed. Torso angles were typically below 30° from neutral and elbow flexion remained within 90°–120° for nearly all tasks. Wrist ulnar deviation ranged from 0° to 26° for both wrists. Conclusion: The normative data created in this investigation provide a description of healthy motion during reaching and dexterity tasks. These normative curves are the initial step towards understanding movement that would contraindicate return to work during an FCE. This work supports a future clinical goal of being able to identify persons at risk of further injury or disability if returned to work too early.
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Affiliation(s)
- Angelica E. Lang
- Department of Health Science, University of Saskatchewan, Saskatoon, Canada
| | - Clark R. Dickerson
- Faculty of Applied Health Sciences, Department of Kinesiology, University of Waterloo, Waterloo, Canada
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20
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Lang AE, Dickerson CR. Task intensity influences upper limb and torso kinematics during two common overhead Functional Capacity Evaluation tasks. Work 2017; 58:121-134. [DOI: 10.3233/wor-172614] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Angelica E. Lang
- Department of Health Sciences, University of Saskatchewan, Saskatoon, SK, Canada
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21
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Sabari J, Shea M, Chen L, Laurenceau A, Leung E. Impact of wheelchair seat height on neck and shoulder range of motion during functional task performance. Assist Technol 2016; 28:183-9. [DOI: 10.1080/10400435.2016.1140692] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- Joyce Sabari
- Occupational Therapy Program, SUNY Downstate College of Health Related Professions Occupational Therapy, Brooklyn, New York, USA
| | - Mary Shea
- Kessler Institute for Rehabilitation, West Orange, New Jersey, USA
| | - Linda Chen
- Occupational Therapy Program, SUNY Downstate College of Health Related Professions Occupational Therapy, Brooklyn, New York, USA
| | - Alyssa Laurenceau
- Occupational Therapy Program, SUNY Downstate College of Health Related Professions Occupational Therapy, Brooklyn, New York, USA
| | - Evan Leung
- Occupational Therapy Program, SUNY Downstate College of Health Related Professions Occupational Therapy, Brooklyn, New York, USA
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22
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Sosnoff JJ, Rice IM, Hsiao-Wecksler ET, Hsu IMK, Jayaraman C, Moon Y. Variability in Wheelchair Propulsion: A New Window into an Old Problem. Front Bioeng Biotechnol 2015; 3:105. [PMID: 26284239 PMCID: PMC4515595 DOI: 10.3389/fbioe.2015.00105] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 07/10/2015] [Indexed: 11/13/2022] Open
Abstract
Manual wheelchair users are at great risk for the development of upper extremity injury and pain. Any loss of upper limb function due to pain adversely impacts the independence and mobility of manual wheelchair users. There is growing theoretical and empirical evidence that fluctuations in movement (i.e., motor variability) are related to musculoskeletal pain. This perspectives paper discusses a local review on several investigations examining the association between variability in wheelchair propulsion and shoulder pain in manual wheelchair users. The experimental data reviewed highlights that the variability of wheelchair propulsion is impacted by shoulder pain in manual wheelchair users. We maintain that inclusion of these metrics in future research on wheelchair propulsion and upper limb pain may yield novel data. Several promising avenues for future research based on this collective work are discussed.
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Affiliation(s)
- Jacob J. Sosnoff
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Ian M. Rice
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Elizabeth T. Hsiao-Wecksler
- Department of Mechanical Engineering and Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Iris M. K. Hsu
- Department of Mechanical Engineering and Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Chandrasekaran Jayaraman
- Department of Industrial and Enterprise Systems Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Yaejin Moon
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, USA
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23
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Qin J, Lin JH, Faber GS, Buchholz B, Xu X. Upper extremity kinematic and kinetic adaptations during a fatiguing repetitive task. J Electromyogr Kinesiol 2014; 24:404-11. [DOI: 10.1016/j.jelekin.2014.02.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 01/08/2014] [Accepted: 02/02/2014] [Indexed: 11/26/2022] Open
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24
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Effects of additional external weight on posture and movement adaptations to fatigue induced by a repetitive pointing task. Hum Mov Sci 2014; 35:1-16. [DOI: 10.1016/j.humov.2014.02.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 01/29/2014] [Accepted: 02/03/2014] [Indexed: 11/20/2022]
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25
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Dainty RS, Alcorn E, Ferguson CA, Gregory DE. Prevalence of occupation-related pain among baristas and an examination of low back and shoulder demand during the preparation of espresso-based beverages. ERGONOMICS 2014; 57:1192-1200. [PMID: 24837283 DOI: 10.1080/00140139.2014.914582] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Many baristas complain of low back pain (LBP) and upper extremity discomfort while at work. This study documented the prevalence of LBP and shoulder pain, via questionnaire, among a population of baristas to determine whether cumulative low back loads and shoulder moments are associated with pain reporting. Fifty-nine baristas completed the questionnaire; ten were also video-recorded for biomechanical analysis while making espresso beverages and cumulative and peak low back loads and shoulder moments were calculated. Seventy-three percent of those who completed the questionnaire reported having experienced LBP, and half attributed this pain to their job as a barista. Furthermore, 68% reported having experienced shoulder pain and half also attributed this pain to their job. Those who suffered from LBP had higher peak low back compression and those with shoulder pain had, in general, higher moments about their dominant shoulder.
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Affiliation(s)
- R Scott Dainty
- a Department of Kinesiology and Physical Education , Wilfrid Laurier University , Waterloo , ON , Canada
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26
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Jayaraman C, Moon Y, Rice IM, Hsiao Wecksler ET, Beck CL, Sosnoff JJ. Shoulder pain and cycle to cycle kinematic spatial variability during recovery phase in manual wheelchair users: a pilot investigation. PLoS One 2014; 9:e89794. [PMID: 24614232 PMCID: PMC3948626 DOI: 10.1371/journal.pone.0089794] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Accepted: 01/24/2014] [Indexed: 11/19/2022] Open
Abstract
UNLABELLED Wheelchair propulsion plays a significant role in the development of shoulder pain in manual wheelchair users (MWU). However wheelchair propulsion metrics related to shoulder pain are not clearly understood. This investigation examined intra-individual kinematic spatial variability during semi-circular wheelchair propulsion as a function of shoulder pain in MWU. Data from 10 experienced adult MWU with spinal cord injury (5 with shoulder pain; 5 without shoulder pain) were analyzed in this study. Participants propelled their own wheelchairs on a dynamometer at 3 distinct speeds (self-selected, 0.7 m/s, 1.1 m/s) for 3 minutes at each speed. Motion capture data of the upper limbs were recorded. Intra-individual kinematic spatial variability of the steady state wrist motion during the recovery phase was determined using principal component analysis (PCA). The kinematic spatial variability was calculated at every 10% intervals (i.e at 11 interval points, from 0% to 100%) along the wrist recovery path. RESULTS Overall, spatial variability was found to be highest at the start and end of the recovery phase and lowest during the middle of the recovery path. Individuals with shoulder pain displayed significantly higher kinematic spatial variability than individuals without shoulder pain at the start (at 10% interval) of the recovery phase (p<.004). CONCLUSIONS Analysis of intra-individual kinematic spatial variability during the recovery phase of manual wheelchair propulsion distinguished between those with and without shoulder pain. Variability analysis of wheelchair propulsion may offer a new approach to monitor the development and rehabilitation of shoulder pain.
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Affiliation(s)
- Chandrasekaran Jayaraman
- Department of Industrial and Enterprise Systems Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Yaejin Moon
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Ian M. Rice
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Elizabeth T. Hsiao Wecksler
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Carolyn L. Beck
- Department of Industrial and Enterprise Systems Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Jacob J. Sosnoff
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
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27
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Adaptations to neck/shoulder fatigue and injuries. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 826:205-28. [PMID: 25330893 DOI: 10.1007/978-1-4939-1338-1_13] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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28
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Constand MK, MacDermid JC. Effects of neck pain on reaching overhead and reading: a case-control study of long and short neck flexion. Sports Med Arthrosc Rehabil Ther Technol 2013; 5:21. [PMID: 24119534 PMCID: PMC3852362 DOI: 10.1186/2052-1847-5-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Accepted: 09/23/2013] [Indexed: 11/12/2022]
Abstract
Background Reaching overhead and reading are tasks that many individuals encounter daily. The level of difficulty of these tasks increases if an individual has neck pain. This study determined the neck movement patterns during these two tasks by comparing neck flexion of individuals with and without neck pain. Methods This case control study used the portable video technology, Dartfish ProSuite 5.5 Video Software, to analyse neck flexion movement patterns. Healthy individuals and individuals with neck pain were videotaped while they completed two tasks: reaching overhead from a standing position and reading from a sitting position. A single position of interest was selected for analysis from both tasks. The degree of neck flexion presented by the participant in this position at the beginning and end of the task was recorded. The angle change between these two time points was calculated for each participant. Differences between groups were determined by comparing the average flexion angle changes in groups by t-tests. Results The average angle change experienced by controls and neck pain participants during the overhead reaching tasks were very similar and a significant difference was not observed. The average angle changes experienced by the two groups during the reading task were more variable, but not significantly different. A t-test comparing average neck flexion angle change during dominant arm elevation for controls (m = −5.28˚, sd = 31.14) and neck pain participants (m = 5.07˚, sd = 32.41) revealed a mean between group difference of −10.34˚ (t17 = −0.688, p = 0.5003). The average neck flexion angle change during long neck flexion was not statistically different between controls (m = 10.08˚, sd = 18.89) and neck pain participants (m = 4˚, sd = 18.18); although the mean between group difference was 6.08˚ (t17 = 0.6856, p = 0.5022). Conclusions Task performance is highly variable between individuals making it difficult to assess the impact of neck pain on small samples even with detailed motion analysis. Despite this, there was a difference in neck posture during reaching activities between controls and patients with neck pain. Neck pain can therefore influence the movement patterns used during daily activities. This has implications for primary and secondary prevention.
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Affiliation(s)
- Marissa K Constand
- School of Rehabilitation Science, McMaster University, 1280 Main Street West, L8S 4 L8, Hamilton, Ontario, Canada
| | - Joy C MacDermid
- School of Rehabilitation Science, McMaster University, 1280 Main Street West, L8S 4 L8, Hamilton, Ontario, Canada
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29
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Gender differences in neck/shoulder muscular patterns in response to repetitive motion induced fatigue. J Electromyogr Kinesiol 2013; 23:1183-9. [DOI: 10.1016/j.jelekin.2013.06.005] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 04/13/2013] [Accepted: 06/06/2013] [Indexed: 11/19/2022] Open
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30
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Fuller JR, Fung J, Côté JN. Posture-movement responses to stance perturbations and upper limb fatigue during a repetitive pointing task. Hum Mov Sci 2013; 32:618-32. [PMID: 24054899 DOI: 10.1016/j.humov.2013.03.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 01/18/2013] [Accepted: 03/08/2013] [Indexed: 12/11/2022]
Abstract
Localized muscle fatigue and postural perturbation have separately been shown to alter whole-body movement but little is known about how humans respond when subjected to both factors combined. Here we sought to quantify the kinematics of postural control and repetitive upper limb movement during standing surface perturbations and in the presence of fatigue. Subjects stood on a motion-based platform and repetitively reached between two shoulder-height targets until noticeably fatigued (rating of perceived exertion=8/10). Every minute, subjects experienced a posterior and an anterior platform translation while reaching to the distal target. Outcomes were compared prior to and with fatigue (first vs. final minute data). When fatigued, regardless of the perturbation condition, subjects decreased their shoulder abduction and increased contralateral trunk flexion, a strategy that may relieve the load on the fatiguing upper limb musculature. During perturbations, kinematic adaptations emerged across the trunk and arm to preserve task performance. In contrast to our expectation, the kinematic response to the perturbations did not alter in the presence of fatigue. Kinematic adaptations in response to the perturbation predominantly occurred in the direction of the reach whereas fatigue adaptations occurred orthogonal to the reach. These findings suggest that during repetitive reaching, fatigue and postural perturbation compensations organize so as to minimize interaction with each other and preserve the global task characteristics of endpoint motion.
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Affiliation(s)
- Jason R Fuller
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada; Feil & Oberfeld/CRIR Research Center, Jewish Rehabilitation Hospital, Laval, Quebec, Canada.
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Relationships between lower limb and trunk discomfort and vascular, muscular and kinetic outcomes during stationary standing work. Gait Posture 2013. [PMID: 23182829 DOI: 10.1016/j.gaitpost.2012.10.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Standing work is associated with discomfort and symptoms in the trunk and lower limb. However, mechanisms underlying these observations are poorly understood. Moreover, most research on standing-related symptoms has focused on only one region (lower limb or trunk), and has not considered the impact and interactions between vascular, muscular and balance outcomes. We measured foot and soleus blood flow, ankle mean arterial pressure, muscle activity of the plantar and dorsi flexors, gluteus medius and trunk flexors and extensors, center of pressure changes and leg and back discomfort in 18 healthy volunteers performing a repetitive box-folding task for 34 min. Results show significant decreases with time in lower limb muscle activity (p<0.00053), and increases in foot blood flow and center-of-pressure mediolateral sway amplitude (p=0.00066). There were significant time effects on back (p=0.017) and lower limb (p<0.000001) discomfort, the latter significantly correlated (r=0.35) to time-related increases in foot blood volume. No changes were correlated to the increase in back discomfort. Results suggest that the origin of standing-related lower limb discomfort is likely vascular in origin, whereas back discomfort is likely multifactorial, involving muscular, vascular and postural control variables.
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Srinivasan D, Mathiassen SE. Motor variability in occupational health and performance. Clin Biomech (Bristol, Avon) 2012; 27:979-93. [PMID: 22954427 DOI: 10.1016/j.clinbiomech.2012.08.007] [Citation(s) in RCA: 171] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 08/13/2012] [Accepted: 08/16/2012] [Indexed: 02/07/2023]
Abstract
Several recent reviews have reported that 'repetitive movements' constitute a risk factor for occupational musculoskeletal disorders in the neck, shoulder and arm regions. More variation in biomechanical exposure is often suggested as an effective intervention in such settings. Since increasing variation using extrinsic methods like job rotation may not always be possible in an industrial context, the intrinsic variability of the motor system may offer an alternative opportunity to increase variation. Motor variability refers to the natural variation in postures, movements and muscle activity observed to different extents in all tasks. The current review discusses research appearing in motor control, sports sciences and occupational biomechanics literature to answer whether motor variability is important to consider in an occupational context, and if yes, whether it can be manipulated by training the worker or changing the working conditions so as to increase biomechanical variation without jeopardizing production. The review concludes that motor variability is, indeed, a relevant issue in occupational health and performance and suggests a number of key issues for further research.
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Affiliation(s)
- Divya Srinivasan
- Centre for Musculoskeletal Research, Department of Occupational and Public Health Sciences, University of Gavle, 801 76 Gavle, Sweden.
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Côté JN. A critical review on physical factors and functional characteristics that may explain a sex/gender difference in work-related neck/shoulder disorders. ERGONOMICS 2011; 55:173-182. [PMID: 21846285 DOI: 10.1080/00140139.2011.586061] [Citation(s) in RCA: 155] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
UNLABELLED The objective of this paper is to critically review recent literature on physical and functional sex/gender (s/g) differences, with focus on physical determinants associated with neck/shoulder musculoskeletal injuries. It is well known that there are s/g differences in anthropometrical and functional body characteristics (e.g. size and strength). However, s/g differences may be wrongly attributed if data analysis does not include appropriate corrections (e.g. by strength for endurance). Recent literature on motor control shows that there may indeed be s/g differences in muscle coordination and movement strategies during upper limb tasks that are not currently explained by methodological inadequacies. Moreover, recent studies have shown differences between men and women in sensory hypersensitivity characteristics associated with neck/shoulder injuries. Taken together, the literature points to the importance of accounting for possible s/g differences at all levels of the biopsychosocial system in order to better understand sex- and gender-specific issues relevant to workplace health. PRACTITIONER SUMMARY This article critically reviews recent literature and a conceptual model highlighting s/g differences in physical and functional characteristics related to neck/shoulder musculoskeletal disorders (NSMSD). Findings have implications on understanding how personal factors may affect NSMSD risk. With better understanding, practitioners can make more appropriate decisions to prevent work-related NSMSD.
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Affiliation(s)
- Julie N Côté
- McGill University, Kinesiology and Physical Education, 475 Pine Avenue West, Montreal, Quebéc, H2W 1S4, Canada.
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