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Relationships between the mechanomyographic amplitude patterns of response and concentric isokinetic fatiguing tasks of the leg extensors.
Physiol Meas. 2013 Oct; 34(10):1293-301.PM

Abstract

The purpose of the present study was to examine possible correlations between the b terms (slopes) form the log-transformed mechanomyographic amplitude (MMGRMS)-force relationships and the fatigue index calculated from 50 maximal concentric contractions. Forty healthy subjects (age = 21 ± 2 yr) performed isometric ramp contractions from 5% to 85% of their maximal voluntary contraction followed by a 50-repetition concentric fatigue protocol of the leg extensors, fatigue index (%) was calculated from the 50-repetitions. MMG was recorded during the ramp contractions from the vastus lateralis (VL) and rectus femoris (RF). The b terms (slopes) were calculated from the log-transformed MMGRMS-force relationships. Correlations were performed comparing the b terms from the MMGRMS-force relationships for the VL and RF with the fatigue index. Significant positive correlations were found among the b terms from the MMGRMS-force relationships for the VL (p = 0.007, r = 0.417) and RF (p = 0.014, r = 0.386) with the fatigue index. The b terms from the log-transformed MMGRMS-force relationships for the VL and RF may have reflected muscle fiber type composition and, thus, correlated with the fatigue index. This adds further support that the MMGRMS-force relationships may reflect muscle fiber type composition.

Authors+Show Affiliations

Neuromechanics Laboratory, Department of Health, Sport and Exercise Sciences, University of Kansas, Lawrence, KS, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

24021893

Citation

Cooper, Michael A., et al. "Relationships Between the Mechanomyographic Amplitude Patterns of Response and Concentric Isokinetic Fatiguing Tasks of the Leg Extensors." Physiological Measurement, vol. 34, no. 10, 2013, pp. 1293-301.
Cooper MA, Herda TJ, Vardiman JP, et al. Relationships between the mechanomyographic amplitude patterns of response and concentric isokinetic fatiguing tasks of the leg extensors. Physiol Meas. 2013;34(10):1293-301.
Cooper, M. A., Herda, T. J., Vardiman, J. P., Gallagher, P. M., & Fry, A. C. (2013). Relationships between the mechanomyographic amplitude patterns of response and concentric isokinetic fatiguing tasks of the leg extensors. Physiological Measurement, 34(10), 1293-301. https://doi.org/10.1088/0967-3334/34/10/1293
Cooper MA, et al. Relationships Between the Mechanomyographic Amplitude Patterns of Response and Concentric Isokinetic Fatiguing Tasks of the Leg Extensors. Physiol Meas. 2013;34(10):1293-301. PubMed PMID: 24021893.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Relationships between the mechanomyographic amplitude patterns of response and concentric isokinetic fatiguing tasks of the leg extensors. AU - Cooper,Michael A, AU - Herda,Trent J, AU - Vardiman,John P, AU - Gallagher,Phillip M, AU - Fry,Andrew C, Y1 - 2013/09/11/ PY - 2013/9/12/entrez PY - 2013/9/12/pubmed PY - 2014/4/18/medline SP - 1293 EP - 301 JF - Physiological measurement JO - Physiol Meas VL - 34 IS - 10 N2 - The purpose of the present study was to examine possible correlations between the b terms (slopes) form the log-transformed mechanomyographic amplitude (MMGRMS)-force relationships and the fatigue index calculated from 50 maximal concentric contractions. Forty healthy subjects (age = 21 ± 2 yr) performed isometric ramp contractions from 5% to 85% of their maximal voluntary contraction followed by a 50-repetition concentric fatigue protocol of the leg extensors, fatigue index (%) was calculated from the 50-repetitions. MMG was recorded during the ramp contractions from the vastus lateralis (VL) and rectus femoris (RF). The b terms (slopes) were calculated from the log-transformed MMGRMS-force relationships. Correlations were performed comparing the b terms from the MMGRMS-force relationships for the VL and RF with the fatigue index. Significant positive correlations were found among the b terms from the MMGRMS-force relationships for the VL (p = 0.007, r = 0.417) and RF (p = 0.014, r = 0.386) with the fatigue index. The b terms from the log-transformed MMGRMS-force relationships for the VL and RF may have reflected muscle fiber type composition and, thus, correlated with the fatigue index. This adds further support that the MMGRMS-force relationships may reflect muscle fiber type composition. SN - 1361-6579 UR - https://www.unboundmedicine.com/medline/citation/24021893/Relationships_between_the_mechanomyographic_amplitude_patterns_of_response_and_concentric_isokinetic_fatiguing_tasks_of_the_leg_extensors_ L2 - https://doi.org/10.1088/0967-3334/34/10/1293 DB - PRIME DP - Unbound Medicine ER -