Surface EMG and load level during long-lasting static contractions of low intensity

Caffier, G; Heinecke, Dietrich; Hinterthan, Ralf

doi:10.1016/0169-8141(93)90039-g

Cited by 14 publications

(5 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An enhancement of conduction velocity has been reported to occur with contraction increasing up 30% of MVC (Hedayatpour et al, 2007). Within a range not exceeding 10% of MVC, however, the slight enhancement observed failed to reach the level of significance (Arendt-Nielsen et al, 1989;Caffier et al, 1993;Hedayatpour et al, 2007). Extending this observation to our study in which most of the recordings were performed within a contraction range of 1-10% of MVC (Fig.…”

Section: Relationship Between Motor Unit Synchrony and Emg Detmentioning

confidence: 75%

Reliability of EMG determinism to detect changes in motor unit synchrony and coherence during submaximal contraction

Schmied¹,

Descarreaux

2011

Journal of Neuroscience Methods

View full text Add to dashboard Cite

Section: Relationship Between Motor Unit Synchrony and Emg Detmentioning

confidence: 75%

Reliability of EMG determinism to detect changes in motor unit synchrony and coherence during submaximal contraction

Schmied¹,

Descarreaux

2011

Journal of Neuroscience Methods

View full text Add to dashboard Cite

“…Different occupational studies found trapezius muscle loads of approximately 5% of maximum voluntary contraction capacity in VDU workers (Feng et al 1997;FernstroÈ m et al 1994;Jensen et al 1993a;Sundelin and Hagberg 1989;Vasseljen and Westgaard 1995b). In isometric contractions sustained at low force, changes in the frequency domain of the EMG signal do not necessarily occur (Caer et al 1993;Gerdle et al 1993;Jorgensen et al 1988;O È berg et al 1994).…”

Section: Discussionmentioning

confidence: 93%

Surface EMG of shoulder and back muscles and posture analysis in secretaries typing at visual display units

Kleine¹,

Schumann

Bradl

et al. 1999

International Archives of Occupational and Environmental Health

View full text Add to dashboard Cite

The increase in trapezius muscle activity was partly related to a lifting of the shoulders to compensate a slight slumping of the back. Another part of the EMG activity increase has to be attributed to fatigue, to attention-related activity or to the combination of both. Therefore, training of the back muscles and a varied organisation of work might have a preventive effect with respect to musculoskeletal complaints in VDU workers.

show abstract

“…strength or electromyography (EMG)) or subjective (e.g. ratings of discomfort) measures (Viitasalo and Komi 1978, Arendt-Nielsen and Mills 1988, Caffier et al 1993, Dedering et al 2002. Despite extensive evidence pertaining to fatigue during sustained static contractions, a large proportion of occupational tasks are dynamic in nature.…”

Section: Introductionmentioning

confidence: 99%

Muscle fatigue and endurance during repetitive intermittent static efforts: development of prediction models

Iridiastadi

Nussbaum

2006

Ergonomics

View full text Add to dashboard Cite

Localized muscle fatigue has received growing attention as a potential design variable and exposure metric in research towards prevention of musculoskeletal disorders in the workplace. While fatigue during sustained static work has been investigated extensively, effects during tasks comprising work-rest cycles are less clear. Work-rest models for static intermittent work have been presented in several reports, but the applicability is often limited to specific conditions. A study was conducted that facilitated a description of the relationships between static intermittent efforts and muscle endurance and fatigue. Exercises consisted of 1 h (maximum) of repetitive static arm abductions, involving a range of muscle contraction levels (10-30% maximum voluntary exertion), duty cycles (0.2-0.8) and cycle times (20-180 s). A between-subject central composite experimental design was used and 15 different exercise conditions were examined with six participants (three females and three males) for each. Along with endurance times, temporal changes related to fatigue were monitored using muscle strength, ratings of discomfort and electromyography (EMG) obtained from the middle-deltoid muscle during the contraction phase of the work cycles. The results of this study showed the influence of contraction level and duty cycle on the majority of fatigue measures used, while cycle time tended to affect EMG spectral measures. Using a response surface methodology, several fatigue prediction models and contour plots were developed that can be employed as an aid for design and evaluation of light repetitive static tasks. Good correspondence was generally found between discomfort rating and other measures of fatigue, suggesting the usefulness of this measure for rapid assessments of local fatigue in the workplace.

show abstract

Surface EMG and load level during long-lasting static contractions of low intensity

Cited by 14 publications

References 25 publications

Reliability of EMG determinism to detect changes in motor unit synchrony and coherence during submaximal contraction

Reliability of EMG determinism to detect changes in motor unit synchrony and coherence during submaximal contraction

Surface EMG of shoulder and back muscles and posture analysis in secretaries typing at visual display units

Muscle fatigue and endurance during repetitive intermittent static efforts: development of prediction models

Contact Info

Product

Resources

About