Differences in multi-joint kinematic patterns of repetitive hammering in healthy, fatigued and shoulder-injured individuals

Côté, Julie N.; Raymond, Denis; Mathieu, Pierre; Feldman, Anatol G.; Levin, Mindy F.

doi:10.1016/j.clinbiomech.2005.02.012

Cited by 109 publications

(48 citation statements)

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“…Mean shoulder horizontal abductionadduction angles were significantly greater in the final minute of the task (End) than in the first minute (Start), whereas mean shoulder-elbow relative phase was significantly decreased as a function of time. These results are consistent with results from previous studies that used repetitive upper-limb tasks and that demonstrated shifts in posture and compensatory changes in coordination, interpreted as strategies to decrease the load on fatiguing muscles (Côté et al, 2002(Côté et al, , 2005Cowley et al, 2014;Forestier & Nougier, 1998;Gates & Dingwell, 2011). However, this is the first time that upper-limb coordination changes have been quantified using the continuous relative phase approach.…”

Section: Discussion Motor and Sensory Adaptations To Fatigue-inducingsupporting

confidence: 81%

“…Muscular fatigue has been associated with altered motor drive toward the muscle (Di Lazzaro et al, 2003), decreased force-generating capacity and decreased speed of muscular contraction (BiglandRitchie, Johansson, Lippold, & Woods, 1983), and heightened activity of sensory metaboreceptors and the fusimotor system (Amann, 2012). In addition, during the development of muscular fatigue, individuals have been found to adopt posture and movement changes that are specific to the kind of fatiguing motor task performed (Côté, Mathieu, Levin, & Feldman, 2002;Côté, Raymond, Mathieu, Feldman, & Levin, 2005;Forestier & Nougier, 1998;Fuller, Lomond, Fung, & Côté, 2009).…”

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confidence: 99%

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Sex-Specific Links in Motor and Sensory Adaptations to Repetitive Motion–Induced Fatigue

2018

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The objectives of this study were to assess the sex-specific relationships between motor and sensory adaptations to repetitive arm motion-induced neck/shoulder fatigue, and to measure how additional sensory stimulation affects these adaptations. Twenty-three participants performed two sessions of a repetitive pointing task until scoring 8 on the Borg CR10 scale for neck/shoulder exertion or for a maximum of 45 min, with and without sensory stimulation (i.e., light touch) applied on the fatiguing shoulder. Just before reaching the task termination criteria, all participants showed changes in mean and variability of arm joint angles and experienced a fivefold increase in anterior deltoid sensory threshold in the stimulus-present condition. Women with the greatest increases in anterior deltoid sensory thresholds demonstrated the greatest increases in shoulder variability (r = .66), whereas men with the greatest increases in upper-trapezius sensory thresholds demonstrated the greatest changes in shoulder angle (r = −.60) and coordination (r = .65) variability. Thus, sensory stimulation had no influence on time to termination but affected how men and women differently adapted, suggesting sex differences in sensorimotor fatigue response mechanisms.

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Section: Discussion Motor and Sensory Adaptations To Fatigue-inducingsupporting

confidence: 81%

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confidence: 99%

Sex-Specific Links in Motor and Sensory Adaptations to Repetitive Motion–Induced Fatigue

2018

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“…Changes in these parameters may indicate the ability to use different motor strategies, reflected as motor flexibility (Jensen and Westgaard 1995;Palmerud et al 1995;Richman and Moorman 2000;Madeleine and Madsen 2009;Madeleine 2010;Srinivasan and Mathiassen 2012). Third, postural changes may be reflected in conventional EMG parameters and mask subtle changes in the EMG manifestations of muscle fatigue (Andersson et al 1974;Côté et al 2005). In fact, this close relation between posture and muscle activity challenges the interpretation of EMG in general.…”

Section: Introductionmentioning

confidence: 96%

Task variation during simulated, repetitive, low-intensity work – influence on manifestation of shoulder muscle fatigue, perceived discomfort and upper-body postures

et al. 2015

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Work-related musculoskeletal disorders are increasing due to industrialisation of work processes. Task variation has been suggested as potential intervention. The objectives of this study were to investigate, first, the influence of task variation on electromyographic (EMG) manifestations of shoulder muscle fatigue and discomfort; second, noticeable postural shoulder changes over time; third, if the association between task variation and EMG might be biased by postural changes. Outcome parameters were recorded using multichannel EMG, Optotrak and the Borg scale. Fourteen participants performed a one-hour repetitive Pegboard task in one continuous and two interrupted conditions with rest and a pick-and-place task, respectively. Manifestations of shoulder muscle fatigue and discomfort feelings were observed throughout the conditions but these were not significantly influenced by task variation. After correction for joint angles, the relation between task variation and EMG was significantly biased but significant effects of task variation remained absent.Practitioner Summary: Comparing a one-hour continuous, repetitive Pegboard task with two interrupted conditions revealed no significant influences of task variation. We did observe that the relation between task variation and EMG was biased by posture and therefore advise taking account for posture when investigating manifestations of muscle fatigue in assembly tasks.

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“…This reduced VARelements may reflect a maladaptive process that persists from the acute phase of pain (Srinivasan and Mathiassen, 2012). Conversely, a reduction of VARelements may reduce the potential for error in control of painful and damaged joints (Côté et al 2005) and in doing so improve function and reduce pain (Yakhdani et al 2010). …”

Section: List Of Tablesmentioning

confidence: 99%

“…This implies that a sustained period of reduced VARelements during pain leads to stresses being applied across fewer tissues near the painful region. In another study, male slaughterhouse workers with chronic neck/shoulder pain and healthy controls performed a manual deboning task that involved multiple cuts and typically lasted [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] seconds (Madeleine and Madsen, 2009). VARelements of upper limb movements were quantified as the standard deviation (SD) and coefficient of variation (CV) for vertical displacement of relative movement between the head-shoulder, shoulder-elbow, and elbow-hip.…”

Section: Negative Consequences Of Reduced Variability In Chronic Painmentioning

confidence: 99%

Movement variability and pain: Searching for a solution

Bergin¹

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Human movement is inherently variable. In the performance of complex, multi-joint tasks, it is possible to consistently achieve an accurate outcome (i.e. low variability of the goal: VARgoal), with many different combinations of joint movements and patterns of muscle activation (i.e. variability in the elements of the movement: VARelements). It has been proposed that when the nervous system is challenged by acute experimental pain, VARelements might increase to search for a new, less painful movement strategy and then decrease if a less painful solution is found. The changes to VARelements found in situations of chronic musculoskeletal pain are more diverse. In chronic pain VARelements might be reduced, increased, not changed, or a complex interaction of these possible adaptations. All previous studies that investigated VARelements during pain evaluated multi-joint tasks (e.g. walking, pointing) that involve multiple elements. It was unclear whether VARelements would be altered in a similar manner for simple tasks with fewer elements and thus limited potential for VARelements to change.For the series of studies included in this thesis, a simple movement task was developed that involved radial-ulnar deviation of the wrist between two target angle regions. Kinematic data were collected with 3-dimensional recording systems and VARelements were considered in wrist flexionextension and forearm pronation-supination. The effect of pain on VARelements during performance of the radial-ulnar deviation task was evaluated in Studies 1-3, under various pain conditions. Study 1 investigated the influence of acute experimental pain, induced with injection of hypertonic saline, on VARelements during performance of the repetitive radial-ulnar deviation task. This study showed that, unlike that observed in more complex multi-joint systems, VARelements was reduced during acute pain in the simple task with limited elements that could change. The most likely explanation was that the motor system constrained movement in an attempt to reduce pain or exert greater control over joint motion.On the foundation of differences in the changes to VARelements for complex and simple tasks during acute pain, Study 2 investigated whether VARelements would initially increase during acute pain to gain exposure to different movement options in a search for a less painful solution. An experimental paradigm was developed where the simple task provoked moderate pain for most movements, but a less painful or non-painful solution was available that was likely to be experienced as a result of VARelements with repetition of the task. We found participants searched for, and found, a less painful movement strategy, but VARelements was not used as part of this search. Participants did not select III the strategy provided as the least painful solution by the experimental paradigm, but found a less painful strategy with gradual changes to wrist/forearm position over multiple repetitions to explore alternative movement options. The changes to VAReleme...

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Differences in multi-joint kinematic patterns of repetitive hammering in healthy, fatigued and shoulder-injured individuals

Cited by 109 publications

References 23 publications

Sex-Specific Links in Motor and Sensory Adaptations to Repetitive Motion–Induced Fatigue

Sex-Specific Links in Motor and Sensory Adaptations to Repetitive Motion–Induced Fatigue

Task variation during simulated, repetitive, low-intensity work – influence on manifestation of shoulder muscle fatigue, perceived discomfort and upper-body postures

Movement variability and pain: Searching for a solution

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