Journal article
The Influence of Motor Unit Number and Muscle Activation on Early Phase Rate of Torque Development in Younger and Older Men
Journal of motor behavior, Vol.54(4), pp.422-428
11/11/2021
DOI: 10.1080/00222895.2021.2001412
PMID: 34763617
Abstract
This study examined the influence of muscle activation and motor unit number estimation (MUNE) on early phase voluntary rate of torque development (RTD) in younger (YM) and older (OM) men. Thirty-two YM (n = 17; Age = 22 yrs) and OM (n = 15; Age = 74 yrs) volunteered to participate in this study. Early phase RTD (first 50 ms of a rapid isometric contraction; RTD
50
) and normalized surface electromyography (first 50 ms of muscle excitation; nEMG
50
) were recorded from the right quadricep muscle group. MUNE was examined from the right vastus lateralis. Multiple linear regression analyses revealed that nEMG
50
had a significant effect on RTD
50
independent of age group (p ≤ 0.001). nEMG
50
had a significant effect on RTD
50
in the OM group (p = 0.037). MUNE had no effect on RTD
50
independent of age. Older adults may depend more on muscle activation at contraction onset of early phase RTD compared to younger adults.
Details
- Title: Subtitle
- The Influence of Motor Unit Number and Muscle Activation on Early Phase Rate of Torque Development in Younger and Older Men
- Creators
- Mitchel A. Magrini - Creighton UniversityRyan J. Colquhoun - University of South AlabamaMatt C. Ferrell - Oklahoma State University Center for Health SciencesSydnie R. Fleming - University of South AlabamaJacob A. Mota - University of AlabamaJacob A. Siedlik - Creighton UniversityNick M. Poidomani - Creighton UniversityNathaniel D.M Jenkins - University of IowaJason M. DeFreitas - Oklahoma State University
- Resource Type
- Journal article
- Publication Details
- Journal of motor behavior, Vol.54(4), pp.422-428
- DOI
- 10.1080/00222895.2021.2001412
- PMID
- 34763617
- NLM abbreviation
- J Mot Behav
- ISSN
- 0022-2895
- eISSN
- 1940-1027
- Publisher
- Routledge
- Grant note
- name: Central States American College of Sports Medicine research Grant
- Language
- English
- Electronic publication date
- 11/11/2021
- Academic Unit
- Center for Social Science Innovation; Injury Prevention Research Center; Health, Sport, and Human Physiology
- Record Identifier
- 9984259656502771
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