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The Effects of Neuromuscular Electri...

Jeon, Sunggun.

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The Effects of Neuromuscular Electrical Stimulation on the Contralateral Repeated Bout Effect of the Elbow Flexor Muscles.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The Effects of Neuromuscular Electrical Stimulation on the Contralateral Repeated Bout Effect of the Elbow Flexor Muscles./
Author:	Jeon, Sunggun.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	87 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-02, Section: A.
Contained By:	Dissertations Abstracts International85-02A.
Subject:	Kinesiology. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30427045
ISBN:	9798380079228

The Effects of Neuromuscular Electrical Stimulation on the Contralateral Repeated Bout Effect of the Elbow Flexor Muscles.
Jeon, Sunggun.

The Effects of Neuromuscular Electrical Stimulation on the Contralateral Repeated Bout Effect of the Elbow Flexor Muscles. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 87 p.

Source: Dissertations Abstracts International, Volume: 85-02, Section: A.

Thesis (Ph.D.)--Oklahoma State University, 2023.

PURPOSE: To examine the effects of neuromuscular electrical stimulation (NMES) on the contralateral repeated bout effect (CL-RBE) of the biceps brachii (BB). METHODS: Twenty untrained adults were randomly assigned into an ipsilateral (IL) or CL group, and completed 7 visits. Following a familiarization (visit 1), participants completed 3 maximal voluntary isometric contractions (MVICs) and submaximal trapezoidal contractions at 40% and 70% MVIC before and after 45 NMES to the BB muscle (1st bout) at pre (visit 2), post (visit 2), 1 day post (24post [visit 3]), and 2 days post (48post [visit 4]). The same procedures were performed for visits 5 (2nd bout), 6 (24post), and 7 (48post) on the same arm for IL or the contralateral arm for CL. Muscle damage markers (MVIC, elbow range of motion [ROM], visual analog scale [VAS] and pressure pain threshold [PPT] for muscle soreness and pain, and muscle thickness via ultrasonography were measured. Surface electromyography (EMG) and mechanomyography (MMG) were recorded from the BB. The EMG signals were decomposed to calculate y-intercepts and slopes for the motor unit (MU) mean firing rate (MFR) and MU action potential amplitude (MUAPAMP) vs. recruitment threshold (RT) relationships. The MMG amplitude (MMGRMS)-force relationships were log-transformed to calculate a and{A0}b terms for the linearly varying segments of the trapezoid. EMG amplitude (EMGRMS) and MMGRMS during steady force were normalized (N-EMGRMS, N-MMGRMS) to MVIC. Separate mixed factorial analysis of variance (ANOVAs) were performed. RESULTS: MVIC and ROM at post were less than pre, 24post, and 48post (p<0.05). Muscle thickness at pre was less than post (p<0.001) and 24post (p=0.019). PPT and the{A0}b terms at pre were greater (p<0.05) than post, 24post, and 48post. Y-intercepts for the MFR vs. RT relationships during the 70% MVIC were lower at post than pre (p=0.015), 24post (p=0.050), and 48post (p=0.016). VAS were lower (p=0.003) during the second bout (0.21{phono}{lstrok}0.27cm) than the first bout (1.06{phono}{lstrok}0.70cm) for the IL group. There were no significant differences between bouts for other dependent variables. CONCLUSION: Although there was an IL-RBE for VAS, the other variables did not support the existence of IL- or CL-RBE with NMES.

ISBN: 9798380079228Subjects--Topical Terms:

517627
Kinesiology.
Subjects--Index Terms:

Cross education

The Effects of Neuromuscular Electrical Stimulation on the Contralateral Repeated Bout Effect of the Elbow Flexor Muscles.
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300 $a 87 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-02, Section: A.
500 $a Advisor: Trevino, Michael.
502 $a Thesis (Ph.D.)--Oklahoma State University, 2023.
520 $a PURPOSE: To examine the effects of neuromuscular electrical stimulation (NMES) on the contralateral repeated bout effect (CL-RBE) of the biceps brachii (BB). METHODS: Twenty untrained adults were randomly assigned into an ipsilateral (IL) or CL group, and completed 7 visits. Following a familiarization (visit 1), participants completed 3 maximal voluntary isometric contractions (MVICs) and submaximal trapezoidal contractions at 40% and 70% MVIC before and after 45 NMES to the BB muscle (1st bout) at pre (visit 2), post (visit 2), 1 day post (24post [visit 3]), and 2 days post (48post [visit 4]). The same procedures were performed for visits 5 (2nd bout), 6 (24post), and 7 (48post) on the same arm for IL or the contralateral arm for CL. Muscle damage markers (MVIC, elbow range of motion [ROM], visual analog scale [VAS] and pressure pain threshold [PPT] for muscle soreness and pain, and muscle thickness via ultrasonography were measured. Surface electromyography (EMG) and mechanomyography (MMG) were recorded from the BB. The EMG signals were decomposed to calculate y-intercepts and slopes for the motor unit (MU) mean firing rate (MFR) and MU action potential amplitude (MUAPAMP) vs. recruitment threshold (RT) relationships. The MMG amplitude (MMGRMS)-force relationships were log-transformed to calculate a and{A0}b terms for the linearly varying segments of the trapezoid. EMG amplitude (EMGRMS) and MMGRMS during steady force were normalized (N-EMGRMS, N-MMGRMS) to MVIC. Separate mixed factorial analysis of variance (ANOVAs) were performed. RESULTS: MVIC and ROM at post were less than pre, 24post, and 48post (p<0.05). Muscle thickness at pre was less than post (p<0.001) and 24post (p=0.019). PPT and the{A0}b terms at pre were greater (p<0.05) than post, 24post, and 48post. Y-intercepts for the MFR vs. RT relationships during the 70% MVIC were lower at post than pre (p=0.015), 24post (p=0.050), and 48post (p=0.016). VAS were lower (p=0.003) during the second bout (0.21{phono}{lstrok}0.27cm) than the first bout (1.06{phono}{lstrok}0.70cm) for the IL group. There were no significant differences between bouts for other dependent variables. CONCLUSION: Although there was an IL-RBE for VAS, the other variables did not support the existence of IL- or CL-RBE with NMES.
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653 $a Electromyography
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653 $a Biceps brachii
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