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2015 | 46 | 1 | 19-27
Tytuł artykułu

The Reliability of Electromyographic Normalization Methods for Cycling Analyses

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Electromyography (EMG) is normalized in relation to a reference maximum voluntary contraction (MVC) value. Different normalization techniques are available but the most reliable method for cycling movements is unknown. This study investigated the reliability of different normalization techniques for cycling analyses. Twenty-five male cyclists (age 24.13 ± 2.79 years, body height 176.22 ± 4.87 cm and body mass 67.23 ± 4.19 kg, BMI = 21.70 ± 2.60 kg·m−1) performed different normalization procedures on two occasions, within the same testing session. The rectus femoris, biceps femoris, gastrocnemius and tibialis anterior muscles were examined. Participants performed isometric normalizations (IMVC) using an isokinetic dynamometer. Five minutes of submaximal cycling (180 W) were also undertaken, allowing the mean (DMA) and peak (PDA) activation from each muscle to serve as reference values. Finally, a 10 s cycling sprint (MxDA) trial was undertaken and the highest activation from each muscle was used as the reference value. Differences between reference EMG amplitude, as a function of normalization technique and time, were examined using repeated measures ANOVAs. The testretest reliability of each technique was also examined using linear regression, intraclass correlations and Cronbach’s alpha. The results showed that EMG amplitude differed significantly between normalization techniques for all muscles, with the IMVC and MxDA methods demonstrating the highest amplitudes. The highest levels of reliability were observed for the PDA technique for all muscles; therefore, our results support the utilization of this method for cycling analyses.
Wydawca
Rocznik
Tom
46
Numer
1
Strony
19-27
Opis fizyczny
Daty
wydano
2015-06-01
zaakceptowano
2015-06-01
online
2015-07-10
Twórcy
  • - Division of Sport, Exercise and Nutritional SciencesUniversity of Central Lancashire.
autor
  • - Division of Sport, Exercise and Nutritional SciencesUniversity of Central Lancashire.
  • - Division of Sport, Exercise and Nutritional SciencesUniversity of Central Lancashire.
  • - Division of Sport, Exercise and Nutritional SciencesUniversity of Central Lancashire.
  • - Division of Sport, Exercise and Nutritional SciencesUniversity of Central Lancashire.
Bibliografia
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  • Ekstrom RA, Soderberg GL, Donatelli RA. Normalization procedures using maximum voluntary isometric contractions for the serratus anterior and trapezius muscles during surface EMG analysis. J Electromyogr Kinesiol, 2005; 15: 418-428.
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  • Netto KJ, Burnett AF. Reliability of normalisation methods for EMG analysis of neck muscles. WORK, 2006; 26: 123-130
  • Sauer J, Potter JJ, Weisshaar CL, Ploeg HL, Thelen DG. Influence of Gender, Power, and Hand Position on Pelvic Motion during Seated Cycling. Med Sci Sports Exerc, 2007; 39: 2204–2211
  • Sinclair J, Brooks D, Edmundson CJ, Hobbs SJ. The efficacy of EMG MVC normalization techniques for running analyses. J Biomech, 2012; 41: 621-623
  • Winter DA. EMG interpretation, In Kumar S, Mital A. Electromyography in ergonomics, Taylor & Francis, 109-25; 1996
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_1515_hukin-2015-0030
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