Journal article
Mechanomyographic Amplitude Is Sensitive to Load-Dependent Neuromuscular Adaptations in Response to Resistance Training
Journal of strength and conditioning research, Vol.35(11), pp.3265-3269
11/01/2021
DOI: 10.1519/JSC.0000000000003276
PMID: 31453941
Abstract
Jenkins, NDM, Miramonti, AA, Hill, EC, Smith, CM, Cochrane-Snyman, KC, Housh, TJ, and Cramer, JT. Mechanomyographic amplitude is sensitive to load-dependent neuromuscular adaptations in response to resistance training. J Strength Cond Res 35(11): 3265-3269, 2021-We examined the sensitivity of the mechanomyographic amplitude (MMGRMS) and frequency (MMGMPF) vs. torque relationships to load-dependent neuromuscular adaptations in response to 6 weeks of higher- vs. lower-load resistance training. Twenty-five men (age = 22.8 ± 4.6 years) were randomly assigned to either a high- (n = 13) or low-load (n = 12) training group and completed 6 weeks of leg extension resistance training at 80 or 30% 1RM. Before and after 3 and 6 weeks of training, mechanomyography signals were recorded during isometric contractions at target torques equal to 10-100% of the subjects' baseline maximal strength to quantify MMGRMS and MMGMPF vs. torque relationships. MMGRMS decreased from Baseline to weeks 3 and 6 in the high-load, but not low-load group, and was dependent on the muscle and intensity of contraction examined. Consequently, MMGRMS was generally lower in the high- than low-load group at weeks 3 and 6, and these differences were most apparent in the vastus lateralis (VL) and rectus femoris muscles at higher contraction intensities. MMGMPF was greater in the high- than low-load training group independent of time or muscle. The MMGRMS vs. torque relationship was sensitive to load-dependent, muscle-specific neuromuscular adaptations and suggest reductions in neuromuscular activation to produce the same absolute submaximal torques after training with high, but not low loads.
Details
- Title: Subtitle
- Mechanomyographic Amplitude Is Sensitive to Load-Dependent Neuromuscular Adaptations in Response to Resistance Training
- Creators
- Nathaniel D M Jenkins - Oklahoma State UniversityAmelia A Miramonti - University of Nebraska–LincolnEthan C Hill - University of Nebraska–LincolnCory M Smith - University of Nebraska–LincolnKristen C Cochrane-Snyman - California State University, FresnoTerry J Housh - University of Nebraska–LincolnJoel T Cramer - University of Nebraska–Lincoln
- Resource Type
- Journal article
- Publication Details
- Journal of strength and conditioning research, Vol.35(11), pp.3265-3269
- DOI
- 10.1519/JSC.0000000000003276
- PMID
- 31453941
- NLM abbreviation
- J Strength Cond Res
- ISSN
- 1064-8011
- eISSN
- 1533-4287
- Language
- English
- Date published
- 11/01/2021
- Academic Unit
- Center for Social Science Innovation; Injury Prevention Research Center; Health, Sport, and Human Physiology
- Record Identifier
- 9984259392302771
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