Enhanced physiological tremor deteriorates plantar flexor torque steadiness after bed rest

E.R. Mulder, A.M.H. Horstman, H.L. Gerrits, M Massa, B Kleine, A. de Haan, D.L. Belavy, D. Felsenberg, M. Zwarts, D.F. Stegeman

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    This study evaluated the effectiveness of resistance training to preserve submaximal plantar flexor (PF) torque steadiness following 60days of bed rest (BR). Twenty-two healthy male subjects underwent either BR only (CTR, n=8), or BR plus resistance training (RT, n=14). The magnitude of torque fluctuations during steady submaximal isometric PF contractions (20%, 40%, 60% and 80% of maximum) were assessed before and after BR. Across contraction intensities, torque fluctuations (coefficient of variation, CV) increased more (P<0.05) after BR for CTR (from 0.31±0.10 to 0.92±0.63; P<0.001), than for RT (from 0.30±0.09 to 0.54±0.27; P<0.01). A shift in the spectral content of torque fluctuations towards increased rhythmic activity between 6.5 and 20Hz was observed in CTR only (P<0.05). H-reflex amplitude (H
    Original languageEnglish
    Pages (from-to)384-393
    Number of pages10
    JournalJournal of Electromyography and Kinesiology
    Volume21
    Issue number2
    DOIs
    Publication statusPublished - 2011

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