Postural and muscular adaptations to repetitive simulated work

Pritchard, Samantha E; Tse, Calvin T.F.; McDonald, Alison C.; Keir, Peter J.

doi:10.1080/00140139.2019.1626491

Cited by 12 publications

(11 citation statements)

References 43 publications

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“…Some of the observed alterations were similar to those observed in injured population, including greater use of clavicular elevation and lesser use of glenohumeral elevation [10]. Other studies have also shown similar upper limb adaptations in a state of fatigue during hammering [11], ratcheting [12] and chain work [13][14][15]. Thus, the kinematic changes observed in the presence of fatigue are potentially risk factors for developing and maintaining shoulder pain [8,[16][17][18].…”

Section: Introductionsupporting

confidence: 59%

Impact of fatigue at the shoulder on the contralateral upper limb kinematics and performance

et al. 2022

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Background Altered movement patterns have been proposed as an etiological factor for the development of musculoskeletal pain. Fatigue influences upper limb kinematics and movement performance which could extend to the contralateral limb and potentially increasing risk of injury. The aim of this study was to investigate the impact of fatigue at the dominant arm on the contralateral upper limb movement. Methods Forty participants were randomly assigned to one of two groups: Control or Fatigue Group. All participants completed a reaching task at the baseline and post-experimental phase, during which they reached four targets with their non-dominant arm in a virtual reality environment. Following the baseline phase, the Fatigue Group completed a shoulder fatigue protocol with their dominant arm only, while the Control Group took a 10-minute break. Thereafter, the reaching task was repeated. Upper limb and trunk kinematics (joint angles and excursions), spatiotemporal (speed and accuracy) and surface electromyographic (sEMG) activity (sEMG signal mean epoch amplitude and median frequency of the EMG power spectrum) were collected. Two-way repeated-measures ANOVA were performed to determine the effects of Time, Group and of the interaction between these factors. Results There was a significant Time x Group interaction for sternoclavicular elevation range of motion (p = 0.040), movement speed (p = 0.043) and accuracy (p = 0.033). The Fatigue group showed higher contralateral sternoclavicular elevation and increased movement error while experiencing fatigue in the dominant arm. Moreover, the Control group increased their speed during the Post-experimental phase compared to baseline (p = 0.043), while the Fatigue group did not show any speed improvement. There was no EMG sign of fatigue in any of the muscles evaluated. Conclusion This study showed that fatigue at the dominant shoulder impacts movement at the contralateral upper limb. Such changes may be a risk factor for the development of shoulder pain in both the fatigued and non-fatigued limbs.

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Section: Introductionsupporting

confidence: 59%

Impact of fatigue at the shoulder on the contralateral upper limb kinematics and performance

et al. 2022

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“…This implies that PSE support allowed the participants to perform the task without the major compensatory movements occurring without support. Although changes in kinematics caused by fatigue are believed to reduce the shoulder joint work (Dupuis et al, 2021;Pritchard et al, 2019;Forestier and Nougier, 1998), it was suggested that such fatigue-induced kinematic alterations may increase the load on periarticular tissues (Lefèvre-Colau et al, 2018;Ludewig and Cook, 2000;Sadler and Cressman, 2019). PSE support, on the other hand, has shown to reduce joint load in the shoulder and elbow joint, and the lower back during overhead work (van der Have et al, 2022).…”

Section: Pse Support Mitigates Fatigue-induced Alterationsmentioning

confidence: 99%

“…Nevertheless, fatigue could still occur during prolonged overhead work (Sood et al, 2007), yet no evidence documents the effect of PSEs in a physically fatigued state. Physical fatigue has been defined as any reversible decrease in performance capacity as a result of physical activity (Bigland-Ritchie and Woods, 1984), and is known to impact proprioception, motor performance, muscle activity, and kinematics of the trunk and upper limbs during reaching movements (Dupuis et al, 2021;Dube and Roy, 2019;Carpenter et al, 1998), hammering (Côté et al, 2005), ratcheting (Cowley and Gates, 2017) and chain work (McDonald et al, 2016(McDonald et al, , 2019Pritchard et al, 2019). These fatigue induced alterations have been suggested as potential risk factors for developing and maintaining shoulder pain (Dupuis et al, 2021;Ebaugh et al, 2006;Forestier and Nougier, 1998;Fuller et al, 2009), since such alterations increase the load on musculoskeletal periarticular structures such as tendons and muscles (Lefèvre-Colau et al, 2018;Ludewig and Cook, 2000;Sadler and Cressman, 2019).…”

Section: Introductionmentioning

confidence: 99%

Passive shoulder exoskeleton support partially mitigates fatigue-induced effects in overhead work

et al. 2023

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“…Work adaptation occurs when expatriates change or adjust their own culture processes to improve cooperation with the host culture (Khammar et al, 2017;Pritchard et al, 2019). Work adaptation is a consequence of behavior adjustment and can be expressed in the implementation of specific preparation aimed at improving cooperation (Byrne & Kirwan, 2019;Lamond et al, 2004).…”

Section: Work Adaptationmentioning

confidence: 99%

Model of Expatriates’ Job Performance Based on Cross-Cultural Adjustment to Work Stress and Work Adaptation

Lee¹

2021

TEL

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The study aims to determine factors affecting the job performance relating to cross-cultural adjustment as it affects work stress and work adaptation. For this study, the research framework was based on cross-cultural flexibility associated with work adaptation and work stress on job performance among expatriates. The research was conducted on a sample of 396 expatriates working in the hospitality industry in Taiwan. Structural equation modeling was utilized in this study. The obtained results confirmed the impact of cross-cultural adjustment on work stress, the negative impact of work stress on job performance; and also, the positive impact of cross-cultural adjustment on work adaptation, and work adaptation on job performance. The results show that the challenges faced by expatriates are derived from work adaption, work stress, and cultural differences. Expatriates who can adapt to the different cultures of foreign countries have higher work participation. It has also been found that a significant correlation exists between cross-cultural adjustments on work pressure. Higher work stress translates into relatively lower job performance.

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Postural and muscular adaptations to repetitive simulated work

Cited by 12 publications

References 43 publications

Impact of fatigue at the shoulder on the contralateral upper limb kinematics and performance

Impact of fatigue at the shoulder on the contralateral upper limb kinematics and performance

Passive shoulder exoskeleton support partially mitigates fatigue-induced effects in overhead work

Model of Expatriates’ Job Performance Based on Cross-Cultural Adjustment to Work Stress and Work Adaptation

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