Electromyography (EMG) analysis of core bracing mechanism after verbal cueing during a bodyweight squat

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Publication Type thesis
School or College College of Health
Department Physical Therapy and Athletic Training
Author Reineck, Jessica F.
Title Electromyography (EMG) analysis of core bracing mechanism after verbal cueing during a bodyweight squat
Date 2019
Description Context: Verbal instruction on core bracing is used by healthcare providers and strength and conditioning professionals with the aim of increasing intrabdominal pressure via co-contraction to prevent potential prevent low back pain (LBP) and injury. Objective: To determine if verbal instruction immediately increases bilateral external oblique (EO) and lumbar erector spinae (LES) muscle activation during a bodyweight squat. Design: An experimental within subjects repeated-measures study. Setting: University of Utah Sports Medicine Research Lab. Participants: 28 healthy adults. Interventions: Participants were verbally instructed on how to brace their core musculature. They performed 3 bodyweight squats without instruction and 3 bodyweight squats immediately after instruction while surface electromyography (EMG) activity was recorded from the EO and LES muscles. Main Outcome Measure: The mean percent of 3 maximal isometric voluntary contraction values during squat trials were calculated and compared using a paired samples t test. Results: All muscles tested, with the exception of the right LES, had significantly more activation after verbal instruction on abdominal bracing compared to bodyweight squats without verbal instruction. Conclusions: Verbal instruction for abdominal bracing increases core muscle activation during a bodyweight squat but not to a level that is clinically significant.
Type Text
Publisher University of Utah
Dissertation Name Master of Science
Language eng
Rights Management (c) Jessica F. Reineck
Format Medium application/pdf
ARK ark:/87278/s69083k6
Setname ir_etd
Date Created 2021-06-16
Date Modified 2021-06-17
ID 1701746
Reference URL https://collections.lib.utah.edu/ark:/87278/s69083k6
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