Lumbopelvic Stability and Trunk Muscle Contractility of Individuals with Chronic Ankle Instability

# Background Chronic ankle instability (CAI) results in hip neuromuscular impairments that can perpetuate dysfunction through reduced lumbopelvic stability and subsequent malpositioning of the lower body during functional movement. Lumbopelvic stability might be further impaired through changes in...

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Autores principales:	Ryan S McCann, Kelly Johnson, Ashley M B Suttmiller
Formato:	article
Lenguaje:	EN
Publicado:	North American Sports Medicine Institute 2021
Materias:	Sports medicine RC1200-1245
Acceso en línea:	https://doaj.org/article/520f907db5a9419787414e75163bf37b
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spelling	oai:doaj.org-article:520f907db5a9419787414e75163bf37b2021-12-02T16:01:46ZLumbopelvic Stability and Trunk Muscle Contractility of Individuals with Chronic Ankle Instability10.26603/001c.221322159-2896https://doaj.org/article/520f907db5a9419787414e75163bf37b2021-06-01T00:00:00Zhttps://ijspt.scholasticahq.com/article/22132-lumbopelvic-stability-and-trunk-muscle-contractility-of-individuals-with-chronic-ankle-instability.pdfhttps://doaj.org/toc/2159-2896# Background Chronic ankle instability (CAI) results in hip neuromuscular impairments that can perpetuate dysfunction through reduced lumbopelvic stability and subsequent malpositioning of the lower body during functional movement. Lumbopelvic stability might be further impaired through changes in trunk muscular contractility. However, lumbopelvic stability and trunk muscle morphology have not been compared between individuals with and without CAI. # Purpose To compare lumbopelvic stability and trunk muscle contractility between individuals with and without chronic ankle instability (CAI) and determine if lumbopelvic stability and trunk muscle contractility are associated with self-reported function. # Study Design Case-control study. # Methods Ten individuals with CAI, 10 ankle sprain copers (COP), and 10 healthy controls (CON) participated. Diagnostic ultrasound imaging was used to assess transversus abdominis (TrA) and lumbar multifidus (LM) muscle contractility. A percent change in contraction thickness from rested to contracted conditions was calculated for each muscle. Lumbopelvic stability was assessed using unilateral hip bridge, trunk flexion endurance, Biering-Sorensen, and side plank tests. Self-reported function was measured with the Foot and Ankle Ability Measure Activity of Daily Living (FAAM-ADL) and Sport (FAAM-S) subscales. One-way ANOVAs and Cohen’s d effect sizes compared scores on clinician and patient-reported outcomes between groups. Pearson product moment correlations analyzed associations between self-reported function and trunk muscle contractility and lumbopelvic stability. Significance was set a priori at P\<0.05 # Results COP had significantly greater TrA contractility than CAI (P\<0.01, d=2.65\[1.45,3.85\]) and CON (P=0.03, d=1.05\[0.08,1.94\]). Although not statistically significant, a large effect size suggest that CAI had lower TrA contractility than CON (P=0.12, d=0.92\[-0.03,1.80\]). No differences existed for LM contractility or lumbopelvic stability tests. A moderate direct correlation (r=0.65, P=0.04) existed between CON’s TrA contractility and FAAM-ADL scores. # Conclusion Deficits in TrA contractility are a novel finding among individuals with CAI. While LM contractility and lumbopelvic stability did not differ between groups, future research should continue to examine their relevance to CAI. # Level of Evidence 3bRyan S McCannKelly JohnsonAshley M B SuttmillerNorth American Sports Medicine InstitutearticleSports medicineRC1200-1245ENInternational Journal of Sports Physical Therapy, Vol 16, Iss 3 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Sports medicine RC1200-1245
spellingShingle	Sports medicine RC1200-1245 Ryan S McCann Kelly Johnson Ashley M B Suttmiller Lumbopelvic Stability and Trunk Muscle Contractility of Individuals with Chronic Ankle Instability
description	# Background Chronic ankle instability (CAI) results in hip neuromuscular impairments that can perpetuate dysfunction through reduced lumbopelvic stability and subsequent malpositioning of the lower body during functional movement. Lumbopelvic stability might be further impaired through changes in trunk muscular contractility. However, lumbopelvic stability and trunk muscle morphology have not been compared between individuals with and without CAI. # Purpose To compare lumbopelvic stability and trunk muscle contractility between individuals with and without chronic ankle instability (CAI) and determine if lumbopelvic stability and trunk muscle contractility are associated with self-reported function. # Study Design Case-control study. # Methods Ten individuals with CAI, 10 ankle sprain copers (COP), and 10 healthy controls (CON) participated. Diagnostic ultrasound imaging was used to assess transversus abdominis (TrA) and lumbar multifidus (LM) muscle contractility. A percent change in contraction thickness from rested to contracted conditions was calculated for each muscle. Lumbopelvic stability was assessed using unilateral hip bridge, trunk flexion endurance, Biering-Sorensen, and side plank tests. Self-reported function was measured with the Foot and Ankle Ability Measure Activity of Daily Living (FAAM-ADL) and Sport (FAAM-S) subscales. One-way ANOVAs and Cohen’s d effect sizes compared scores on clinician and patient-reported outcomes between groups. Pearson product moment correlations analyzed associations between self-reported function and trunk muscle contractility and lumbopelvic stability. Significance was set a priori at P\<0.05 # Results COP had significantly greater TrA contractility than CAI (P\<0.01, d=2.65\[1.45,3.85\]) and CON (P=0.03, d=1.05\[0.08,1.94\]). Although not statistically significant, a large effect size suggest that CAI had lower TrA contractility than CON (P=0.12, d=0.92\[-0.03,1.80\]). No differences existed for LM contractility or lumbopelvic stability tests. A moderate direct correlation (r=0.65, P=0.04) existed between CON’s TrA contractility and FAAM-ADL scores. # Conclusion Deficits in TrA contractility are a novel finding among individuals with CAI. While LM contractility and lumbopelvic stability did not differ between groups, future research should continue to examine their relevance to CAI. # Level of Evidence 3b
format	article
author	Ryan S McCann Kelly Johnson Ashley M B Suttmiller
author_facet	Ryan S McCann Kelly Johnson Ashley M B Suttmiller
author_sort	Ryan S McCann
title	Lumbopelvic Stability and Trunk Muscle Contractility of Individuals with Chronic Ankle Instability
title_short	Lumbopelvic Stability and Trunk Muscle Contractility of Individuals with Chronic Ankle Instability
title_full	Lumbopelvic Stability and Trunk Muscle Contractility of Individuals with Chronic Ankle Instability
title_fullStr	Lumbopelvic Stability and Trunk Muscle Contractility of Individuals with Chronic Ankle Instability
title_full_unstemmed	Lumbopelvic Stability and Trunk Muscle Contractility of Individuals with Chronic Ankle Instability
title_sort	lumbopelvic stability and trunk muscle contractility of individuals with chronic ankle instability
publisher	North American Sports Medicine Institute
publishDate	2021
url	https://doaj.org/article/520f907db5a9419787414e75163bf37b
work_keys_str_mv	AT ryansmccann lumbopelvicstabilityandtrunkmusclecontractilityofindividualswithchronicankleinstability AT kellyjohnson lumbopelvicstabilityandtrunkmusclecontractilityofindividualswithchronicankleinstability AT ashleymbsuttmiller lumbopelvicstabilityandtrunkmusclecontractilityofindividualswithchronicankleinstability
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Lumbopelvic Stability and Trunk Muscle Contractility of Individuals with Chronic Ankle Instability

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