Repeated stimulation, inter-stimulus interval and inter-electrode distance alters muscle contractile properties as measured by Tensiomyography

Hannah V Wilson, Mark I Johnson and Peter Francis

PLOS ONE, 2018, vol. 13, issue 2, 1-15

Abstract: Context: The influence of methodological parameters on the measurement of muscle contractile properties using Tensiomyography (TMG) has not been published. Objective: To investigate the; (1) reliability of stimulus amplitude needed to elicit maximum muscle displacement (Dm), (2) effect of changing inter-stimulus interval on Dm (using a fixed stimulus amplitude) and contraction time (Tc), (3) the effect of changing inter-electrode distance on Dm and Tc. Design: Within subject, repeated measures. Participants: 10 participants for each objective. Main outcome measures: Dm and Tc of the rectus femoris, measured using TMG. Results: The coefficient of variance (CV) and the intra-class correlation (ICC) of stimulus amplitude needed to elicit maximum Dm was 5.7% and 0.92 respectively. Dm was higher when using an inter-electrode distance of 7cm compared to 5cm [P = 0.03] and when using an inter-stimulus interval of 10s compared to 30s [P = 0.017]. Further analysis of inter-stimulus interval data, found that during 10 repeated stimuli Tc became faster after the 5th measure when compared to the second measure [P

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0191965

DOI: 10.1371/journal.pone.0191965

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