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Greater Breast Support Alters Trunk and Knee Joint Biomechanics Commonly Associated With Anterior Cruciate Ligament Injury

OBJECTIVE: The female breast is a passive tissue with little intrinsic support. Therefore, women rely on external breast support (sports bras) to control breast motion during athletic tasks. Research has demonstrated that lower levels of breast support are associated with altered trunk and pelvis mo...

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Autores principales: Fong, Hailey B., Nelson, Alexis K., Storey, Julie E., Hinton, Jay, Puppa, Melissa, McGhee, Deirdre, Greenwood, Daniel, Powell, Douglas W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9163541/
https://www.ncbi.nlm.nih.gov/pubmed/35669558
http://dx.doi.org/10.3389/fspor.2022.861553
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author Fong, Hailey B.
Nelson, Alexis K.
Storey, Julie E.
Hinton, Jay
Puppa, Melissa
McGhee, Deirdre
Greenwood, Daniel
Powell, Douglas W.
author_facet Fong, Hailey B.
Nelson, Alexis K.
Storey, Julie E.
Hinton, Jay
Puppa, Melissa
McGhee, Deirdre
Greenwood, Daniel
Powell, Douglas W.
author_sort Fong, Hailey B.
collection PubMed
description OBJECTIVE: The female breast is a passive tissue with little intrinsic support. Therefore, women rely on external breast support (sports bras) to control breast motion during athletic tasks. Research has demonstrated that lower levels of breast support are associated with altered trunk and pelvis movement patterns during running, a common athletic task. However, no previous study has identified the effect of sports bra support on movement patterns during other athletic tasks including landing. Therefore, the purpose of this study was to examine the effects of breast support on trunk and knee joint biomechanics in female collegiate athletes during a double-leg landing task. METHODS: Fourteen female collegiate athletes completed five double-leg landing trials in each of three different sports bra conditions: no support, low support, and high support. A 10-camera motion capture system (250 Hz, Qualisys, Goteburg, Sweden) and two force platforms (1,250 Hz, AMTI, Watertown, MA, USA) were used to collect three-dimensional kinematics and ground reaction forces simultaneously. Visual 3D was used to calculate trunk segment and knee joint angles and moments. Custom software (MATLAB 2021a) was used to determine discrete values of dependent variables including vertical breast displacement, knee joint and trunk segment angles at initial contact and 100 ms post-initial contact, and peak knee joint moments. A repeated measures analysis of covariance with post-hoc paired samples t-tests were used to evaluate the effect of breast support on landing biomechanics. RESULTS: Increasing levels of breast support were associated with reductions in peak knee flexion (Right: p = 0.008; Left: p = 0.029) and peak knee valgus angles (Right: p = 0.011; Left: p = 0.003) as well as reductions in peak knee valgus moments (Right: p = 0.033; Left: p = 0.013). There were no changes in peak knee extension moments (Right: p = 0.216; Left: p = 0.261). Increasing levels of breast support were associated with greater trunk flexion angles at initial contact (p = 0.024) and greater peak trunk flexion angles (p = 0.002). CONCLUSIONS: Lower levels of breast support are associated with knee joint and trunk biomechanical profiles suggested to increase ACL injury risk.
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spelling pubmed-91635412022-06-05 Greater Breast Support Alters Trunk and Knee Joint Biomechanics Commonly Associated With Anterior Cruciate Ligament Injury Fong, Hailey B. Nelson, Alexis K. Storey, Julie E. Hinton, Jay Puppa, Melissa McGhee, Deirdre Greenwood, Daniel Powell, Douglas W. Front Sports Act Living Sports and Active Living OBJECTIVE: The female breast is a passive tissue with little intrinsic support. Therefore, women rely on external breast support (sports bras) to control breast motion during athletic tasks. Research has demonstrated that lower levels of breast support are associated with altered trunk and pelvis movement patterns during running, a common athletic task. However, no previous study has identified the effect of sports bra support on movement patterns during other athletic tasks including landing. Therefore, the purpose of this study was to examine the effects of breast support on trunk and knee joint biomechanics in female collegiate athletes during a double-leg landing task. METHODS: Fourteen female collegiate athletes completed five double-leg landing trials in each of three different sports bra conditions: no support, low support, and high support. A 10-camera motion capture system (250 Hz, Qualisys, Goteburg, Sweden) and two force platforms (1,250 Hz, AMTI, Watertown, MA, USA) were used to collect three-dimensional kinematics and ground reaction forces simultaneously. Visual 3D was used to calculate trunk segment and knee joint angles and moments. Custom software (MATLAB 2021a) was used to determine discrete values of dependent variables including vertical breast displacement, knee joint and trunk segment angles at initial contact and 100 ms post-initial contact, and peak knee joint moments. A repeated measures analysis of covariance with post-hoc paired samples t-tests were used to evaluate the effect of breast support on landing biomechanics. RESULTS: Increasing levels of breast support were associated with reductions in peak knee flexion (Right: p = 0.008; Left: p = 0.029) and peak knee valgus angles (Right: p = 0.011; Left: p = 0.003) as well as reductions in peak knee valgus moments (Right: p = 0.033; Left: p = 0.013). There were no changes in peak knee extension moments (Right: p = 0.216; Left: p = 0.261). Increasing levels of breast support were associated with greater trunk flexion angles at initial contact (p = 0.024) and greater peak trunk flexion angles (p = 0.002). CONCLUSIONS: Lower levels of breast support are associated with knee joint and trunk biomechanical profiles suggested to increase ACL injury risk. Frontiers Media S.A. 2022-05-20 /pmc/articles/PMC9163541/ /pubmed/35669558 http://dx.doi.org/10.3389/fspor.2022.861553 Text en Copyright © 2022 Fong, Nelson, Storey, Hinton, Puppa, McGhee, Greenwood and Powell. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Sports and Active Living
Fong, Hailey B.
Nelson, Alexis K.
Storey, Julie E.
Hinton, Jay
Puppa, Melissa
McGhee, Deirdre
Greenwood, Daniel
Powell, Douglas W.
Greater Breast Support Alters Trunk and Knee Joint Biomechanics Commonly Associated With Anterior Cruciate Ligament Injury
title Greater Breast Support Alters Trunk and Knee Joint Biomechanics Commonly Associated With Anterior Cruciate Ligament Injury
title_full Greater Breast Support Alters Trunk and Knee Joint Biomechanics Commonly Associated With Anterior Cruciate Ligament Injury
title_fullStr Greater Breast Support Alters Trunk and Knee Joint Biomechanics Commonly Associated With Anterior Cruciate Ligament Injury
title_full_unstemmed Greater Breast Support Alters Trunk and Knee Joint Biomechanics Commonly Associated With Anterior Cruciate Ligament Injury
title_short Greater Breast Support Alters Trunk and Knee Joint Biomechanics Commonly Associated With Anterior Cruciate Ligament Injury
title_sort greater breast support alters trunk and knee joint biomechanics commonly associated with anterior cruciate ligament injury
topic Sports and Active Living
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9163541/
https://www.ncbi.nlm.nih.gov/pubmed/35669558
http://dx.doi.org/10.3389/fspor.2022.861553
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