Myoelectric manifestations of fatigue at low contraction levels in subjects with and without chronic pain

Kallenberg, L.A.C.; Schulte, E.; Disselhorst‐Klug, Catherine; Hermens, Hermie

doi:10.1016/j.jelekin.2006.04.004

Cited by 82 publications

(62 citation statements)

References 49 publications

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“…The three sets revealed a decreasing trend for CV, MNF and MDF and a growing trend for RMS and ARV, which has been widely reported on in the scientific literature as resulting from fatigue in static contractions (Lloyd, 1971;Moritani et al, 1982;Arendt-Nielsen and Mills, 1988;Kallenberg et al, 2007). This also indicates that in the maximum intensity exercise at 60º/s, with 10 repetitions, the fatigue state is already reached in the execution of a single set.…”

Section: Discussionsupporting

confidence: 68%

“…This behavior of the myoelectric signal is called slow non-stationarity (or quasi-stationarity), given that the SEMG signal may preserve its characteristics during several seconds (Bonato et al, 2001), after which new muscle fi ber recruitment starts changing the signal properties (Farina, 2006). It is well established in scientifi c literature on fatigue analysis that under quasistationary conditions, the amplitude parameters (e.g., average rectifi ed value and root mean square) tend to increase, whereas frequency indicators (e.g., mean frequency and median frequency) tend to decrease during sustained fatiguing contraction (Lloyd, 1971;Moritani et al, 1982;Arendt-Nielsen and Mills, 1988;Kallenberg et al, 2007). However, under dynamic Volume 30, Número 4, p. 312-321, 2014 conditions the assumption of quasi-stationarity does not hold because the frequency content of the signal continuously changes over time.…”

Section: Introductionmentioning

confidence: 99%

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Study of muscle fatigue in isokinetic exercise with estimated conduction velocity and traditional electromyographic indicators

Schwartz

Bottaro

Celes

et al. 2014

Rev. Bras. Eng. Bioméd.

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Introduction: In the study of human biomechanics, it is often desirable to evaluate fatigue in the muscles that are involved in performing a particular task. Identifying the phenomena responsible for this condition is a problem that in most cases is complex and requires appropriate research mechanisms. Isokinetic dynamometry (ID) and surface electromyography (SEMG) are two techniques widely used in studies on strength and muscle fatigue. Their effectiveness is conditioned upon a good understanding of their limitations and the adoption of procedures to fully exploit the potential of each one. The main goal of the present study is to verify whether the electromyographic parameters, especially the conduction velocity (CV), are sensitive to the fatigue instauration process within sets of maximal isokinetic contractions. CV is a basic physiological parameter directly related to muscle activity and still little explored in experiments combining ID and SEMG. Methods: Instrumentation architecture that combines ID and SEMG was used to estimate electromyographic and biomechanical parameters in protocols of maximum intensity isokinetic knee extension exercises. This architecture allows for limiting the parameter estimates to a specifi c region of isokinetic exercise, called the isokinetic load range (ILR), where one can consider that the angular velocity is constant and the SEMG signals are cyclo-stationary. Electromyographic signals were acquired using an array of electrodes. Conclusion: The results suggest that CV and the other SEMG parameters, including amplitude and frequency descriptors, are sensitive to detect a fatigue process only in protocols that restrict the analysis to ILR and that also bring the subject to a state of fatigue quickly.

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Section: Discussionsupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Study of muscle fatigue in isokinetic exercise with estimated conduction velocity and traditional electromyographic indicators

Schwartz

Bottaro

Celes

et al. 2014

Rev. Bras. Eng. Bioméd.

View full text Add to dashboard Cite

show abstract

“…Three of them were not included, since one was not taking oral contraceptive regularly, and two were older than 40 The treatment could not be initiating during the premenstrual phase or during menstruation and was conducted over four and a half weeks. The last treatment session coincided with the same menstrual phase than the first treatment session.…”

Section: Methodsmentioning

confidence: 99%

Efficacy of electroacupuncture for myofascial pain in the upper trapezius muscle: a case series

Aranha

Alves

Bérzin

et al. 2011

Rev. bras. fisioter.

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“…Mistakes by individuals with neck pain in judging the visual vertical in the rod and frame test have been reported [23][24][25] . Neck muscle pain is associated with neck muscle fatigue 26,27) . To our knowledge, vertical perception has not been examined in individuals with only neck muscle fatigue.…”

Section: Introductionmentioning

confidence: 99%

Postural Stability and Visual Verticality Perception of Neck Disturbance of the Middle-aged during Quiet Standing

et al. 2013

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Abstract. [Purpose] This study investigated postural stability and visual vertical perception of healthy middleaged subjects before and after induction of dorsal neck muscle fatigue.[Subjects] Fourteen subjects (3 males, 11 females) were recruited from the community.[Methods] To induce neck extensor muscle fatigue, participants pushed their heads against a myometer. The average center of pressure (COP) displacement in the medial-lateral (ML) and anterior-posterior (AP) directions and average sway velocity were measured on a force platform, and the error in visual vertical perception was measured using the rod and frame test.[Results] The average COP displacement in the AP direction and average sway velocity were significantly different between before and after induction of neck muscle fatigue. No difference in the average COP displacement in the ML direction or errors in visual verticality perception was observed before and after neck muscle fatigue. [Conclusion] In the presence of visual input, dorsal neck muscle fatigue induced postural instability, but not visual vertical misperception. After isometric or repetitive neck extensor muscle contraction for a long period, taking a rest for a while before changing posture from sitting to standing is recommended for workers, to avoid an increase in postural sway in standing, which may lead to an accidental fall.

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Myoelectric manifestations of fatigue at low contraction levels in subjects with and without chronic pain

Cited by 82 publications

References 49 publications

Study of muscle fatigue in isokinetic exercise with estimated conduction velocity and traditional electromyographic indicators

Study of muscle fatigue in isokinetic exercise with estimated conduction velocity and traditional electromyographic indicators

Efficacy of electroacupuncture for myofascial pain in the upper trapezius muscle: a case series

Postural Stability and Visual Verticality Perception of Neck Disturbance of the Middle-aged during Quiet Standing

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