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|Title: ||Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings|
|Authors: ||Balshaw, Thomas G.|
Maden-Wilkinson, Thomas M.
Kong, Pui W.
Folland, Jonathan P.
|Keywords: ||Voluntary muscle contraction|
Peripheral nerve stimulation
Coefficient of variation
Intraclass correlation coefficient
Evoked muscle response
|Issue Date: ||2017|
|Publisher: ||Springer / © The Authors|
|Citation: ||BALSHAW, T.G. ... et al, 2017. Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings. European Journal of Applied Physiology, 117 (6), pp. 1085-1094.|
|Abstract: ||Purpose: The reliability of surface electromyography (sEMG) is typically modest even with rigorous methods, and therefore further improvements in sEMG reliability are desirable. This study compared the between-session reliability (both within participant absolute reliability and between-participant relative reliability) of sEMG amplitude from single vs. average of two distinct recording sites, for individual muscle (IM) and whole quadriceps (WQ) measures during voluntary and evoked contractions. Methods: Healthy males (n = 20) performed unilateral isometric knee extension contractions: voluntary maximum and submaximum (60%), as well as evoked twitch contractions on two separate days. sEMG was recorded from two distinct sites on each superficial quadriceps muscle. Results: Averaging two recording sites vs. using single site measures improved reliability for IM and WQ measurements during voluntary (16–26% reduction in within-participant coefficient of variation, CVW) and evoked contractions (40–56% reduction in CVW). Conclusions: For sEMG measurements from large muscles, averaging the recording of two distinct sites is recommended as it improves within-participant reliability. This improved sensitivity has application to clinical and research measurement of sEMG amplitude.|
|Description: ||This is an open access article published by Springer and distributed under the terms of the Creative Commons Attribution Licence, http://
|Sponsor: ||The study was financially supported by the Arthritis
Research UK Centre for Sport, Exercise, and Osteoarthritis (Grant
|Publisher Link: ||http://dx.doi.org/10.1007/s00421-017-3595-z|
|Appears in Collections:||Published Articles (Sport, Exercise and Health Sciences)|
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