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Relationships between Quadriceps Tendon Elasticity and Knee Flexion Angle in Young Healthy Adults

Background and objectives: Although tendon elasticity by elastography is useful for diagnosing tendon disorders and planning rehabilitation regimens of the tendon, there are few reports on the quadriceps tendon. Moreover, relationships between the quadriceps tendon elasticity and knee angle have not...

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Autores principales: Ebihara, Bungo, Mutsuzaki, Hirotaka, Fukaya, Takashi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6409608/
https://www.ncbi.nlm.nih.gov/pubmed/30781444
http://dx.doi.org/10.3390/medicina55020053
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author Ebihara, Bungo
Mutsuzaki, Hirotaka
Fukaya, Takashi
author_facet Ebihara, Bungo
Mutsuzaki, Hirotaka
Fukaya, Takashi
author_sort Ebihara, Bungo
collection PubMed
description Background and objectives: Although tendon elasticity by elastography is useful for diagnosing tendon disorders and planning rehabilitation regimens of the tendon, there are few reports on the quadriceps tendon. Moreover, relationships between the quadriceps tendon elasticity and knee angle have not been investigated. The purpose of this study was to clarify the relationship between quadriceps tendon elasticity and knee flexion angle in young healthy adults using elastography, and to investigate the difference in elasticity by sex and leg dominance. Materials and Methods: A total of 40 knees in 20 young healthy adults were included in this study (age: 25.5 (23.3–27.5) years). At knee flexion of 30°, 60°, and 90°, quadriceps tendon elasticity was measured using ShearWave™ Elastography during the ultrasound examination. Results: There were significant differences in the elasticity between all angles (p < 0.001). Elasticity was increased more at 60° than at 30° and at 90° than at 60°. Elasticity in men was higher than that in women at 60° (p = 0.029). There were no differences (p = 0.798) in elasticity at each angle between the dominant and non-dominant legs. Conclusions: The quadriceps tendon elasticity increased according to the knee flexion angle in young healthy adults. Moreover, elasticity was affected by sex, but not by leg dominance. Clinically, in a rehabilitation regimen, attention should be paid to exercises that could increase stiffness accompanying flexion of the knee to avoid further tendon damage as risk management in the acute phase.
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spelling pubmed-64096082019-03-25 Relationships between Quadriceps Tendon Elasticity and Knee Flexion Angle in Young Healthy Adults Ebihara, Bungo Mutsuzaki, Hirotaka Fukaya, Takashi Medicina (Kaunas) Article Background and objectives: Although tendon elasticity by elastography is useful for diagnosing tendon disorders and planning rehabilitation regimens of the tendon, there are few reports on the quadriceps tendon. Moreover, relationships between the quadriceps tendon elasticity and knee angle have not been investigated. The purpose of this study was to clarify the relationship between quadriceps tendon elasticity and knee flexion angle in young healthy adults using elastography, and to investigate the difference in elasticity by sex and leg dominance. Materials and Methods: A total of 40 knees in 20 young healthy adults were included in this study (age: 25.5 (23.3–27.5) years). At knee flexion of 30°, 60°, and 90°, quadriceps tendon elasticity was measured using ShearWave™ Elastography during the ultrasound examination. Results: There were significant differences in the elasticity between all angles (p < 0.001). Elasticity was increased more at 60° than at 30° and at 90° than at 60°. Elasticity in men was higher than that in women at 60° (p = 0.029). There were no differences (p = 0.798) in elasticity at each angle between the dominant and non-dominant legs. Conclusions: The quadriceps tendon elasticity increased according to the knee flexion angle in young healthy adults. Moreover, elasticity was affected by sex, but not by leg dominance. Clinically, in a rehabilitation regimen, attention should be paid to exercises that could increase stiffness accompanying flexion of the knee to avoid further tendon damage as risk management in the acute phase. MDPI 2019-02-15 /pmc/articles/PMC6409608/ /pubmed/30781444 http://dx.doi.org/10.3390/medicina55020053 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ebihara, Bungo
Mutsuzaki, Hirotaka
Fukaya, Takashi
Relationships between Quadriceps Tendon Elasticity and Knee Flexion Angle in Young Healthy Adults
title Relationships between Quadriceps Tendon Elasticity and Knee Flexion Angle in Young Healthy Adults
title_full Relationships between Quadriceps Tendon Elasticity and Knee Flexion Angle in Young Healthy Adults
title_fullStr Relationships between Quadriceps Tendon Elasticity and Knee Flexion Angle in Young Healthy Adults
title_full_unstemmed Relationships between Quadriceps Tendon Elasticity and Knee Flexion Angle in Young Healthy Adults
title_short Relationships between Quadriceps Tendon Elasticity and Knee Flexion Angle in Young Healthy Adults
title_sort relationships between quadriceps tendon elasticity and knee flexion angle in young healthy adults
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6409608/
https://www.ncbi.nlm.nih.gov/pubmed/30781444
http://dx.doi.org/10.3390/medicina55020053
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