Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/24471 |
Resumo: | Muscular weakness and strength imbalance between the thigh muscles are considered risk factors for knee injuries. Hormonal changes, characteristic of puberty, strongly affect muscle strength; however, it is unknown whether they affect muscular strength balance. The present study aimed to compare knee flexor strength, knee extensor strength, and strength balance ratio, called the conventional ratio (CR), between prepubertal and postpubertal swimmers of both sexes. A total of 56 boys and 22 girls aged between 10 and 20 years participated in the study. Peak torque, CR, and body composition were measured using an isokinetic dynamometer and dual-energy X-ray absorptiometry, respectively. The postpubertal boys group presented significantly higher fat-free mass (p < 0.001) and lower fat mass (p = 0.001) than the prepubertal group. There were no significant differences among the female swimmers. Peak torque for both flexor and extensor muscles was significantly greater in postpubertal male (p < 0.001, both) and female swimmers (p < 0.001 and p = 0.001, respectively) than in prepubertal swimmers. The CR did not differ between the pre- and postpubertal groups. However, the mean CR values were lower than the literature recommendations, which brings attention to a higher risk of knee injuries. |
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Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot studyPubertyIsokineticPeak torqueConventional ratioMuscle balanceMuscular weakness and strength imbalance between the thigh muscles are considered risk factors for knee injuries. Hormonal changes, characteristic of puberty, strongly affect muscle strength; however, it is unknown whether they affect muscular strength balance. The present study aimed to compare knee flexor strength, knee extensor strength, and strength balance ratio, called the conventional ratio (CR), between prepubertal and postpubertal swimmers of both sexes. A total of 56 boys and 22 girls aged between 10 and 20 years participated in the study. Peak torque, CR, and body composition were measured using an isokinetic dynamometer and dual-energy X-ray absorptiometry, respectively. The postpubertal boys group presented significantly higher fat-free mass (p < 0.001) and lower fat mass (p = 0.001) than the prepubertal group. There were no significant differences among the female swimmers. Peak torque for both flexor and extensor muscles was significantly greater in postpubertal male (p < 0.001, both) and female swimmers (p < 0.001 and p = 0.001, respectively) than in prepubertal swimmers. The CR did not differ between the pre- and postpubertal groups. However, the mean CR values were lower than the literature recommendations, which brings attention to a higher risk of knee injuries.MDPIBiblioteca Digital do IPBAmado, Bruno LombardiLira, Claudio A.B. deVancini, Rodrigo LuizForte, PedroCosta, TalineWeiss, KatjaKnechtle, BeatAndrade, Marilia Santos2021-12-07T09:55:20Z20232023-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/24471engAmado, Bruno Lombardi; Lira, Claudio A.B. de; Vancini, Rodrigo Luiz; Forte, Pedro; Costa, Taline; Weiss, Katja; Knechtle, Beat; Andrade, Marilia Santos (2023). Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study. Healthcare. eISSN 2227-9032. 11:5, p. 1-2810.3390/healthcare110507442227-9032info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-07T01:18:27Zoai:bibliotecadigital.ipb.pt:10198/24471Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:15:00.009663Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study |
title |
Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study |
spellingShingle |
Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study Amado, Bruno Lombardi Puberty Isokinetic Peak torque Conventional ratio Muscle balance |
title_short |
Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study |
title_full |
Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study |
title_fullStr |
Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study |
title_full_unstemmed |
Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study |
title_sort |
Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study |
author |
Amado, Bruno Lombardi |
author_facet |
Amado, Bruno Lombardi Lira, Claudio A.B. de Vancini, Rodrigo Luiz Forte, Pedro Costa, Taline Weiss, Katja Knechtle, Beat Andrade, Marilia Santos |
author_role |
author |
author2 |
Lira, Claudio A.B. de Vancini, Rodrigo Luiz Forte, Pedro Costa, Taline Weiss, Katja Knechtle, Beat Andrade, Marilia Santos |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Amado, Bruno Lombardi Lira, Claudio A.B. de Vancini, Rodrigo Luiz Forte, Pedro Costa, Taline Weiss, Katja Knechtle, Beat Andrade, Marilia Santos |
dc.subject.por.fl_str_mv |
Puberty Isokinetic Peak torque Conventional ratio Muscle balance |
topic |
Puberty Isokinetic Peak torque Conventional ratio Muscle balance |
description |
Muscular weakness and strength imbalance between the thigh muscles are considered risk factors for knee injuries. Hormonal changes, characteristic of puberty, strongly affect muscle strength; however, it is unknown whether they affect muscular strength balance. The present study aimed to compare knee flexor strength, knee extensor strength, and strength balance ratio, called the conventional ratio (CR), between prepubertal and postpubertal swimmers of both sexes. A total of 56 boys and 22 girls aged between 10 and 20 years participated in the study. Peak torque, CR, and body composition were measured using an isokinetic dynamometer and dual-energy X-ray absorptiometry, respectively. The postpubertal boys group presented significantly higher fat-free mass (p < 0.001) and lower fat mass (p = 0.001) than the prepubertal group. There were no significant differences among the female swimmers. Peak torque for both flexor and extensor muscles was significantly greater in postpubertal male (p < 0.001, both) and female swimmers (p < 0.001 and p = 0.001, respectively) than in prepubertal swimmers. The CR did not differ between the pre- and postpubertal groups. However, the mean CR values were lower than the literature recommendations, which brings attention to a higher risk of knee injuries. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12-07T09:55:20Z 2023 2023-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10198/24471 |
url |
http://hdl.handle.net/10198/24471 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Amado, Bruno Lombardi; Lira, Claudio A.B. de; Vancini, Rodrigo Luiz; Forte, Pedro; Costa, Taline; Weiss, Katja; Knechtle, Beat; Andrade, Marilia Santos (2023). Comparison of knee muscular strength balance among pre- and post-puberty adolescent swimmers: a cross-sectional pilot study. Healthcare. eISSN 2227-9032. 11:5, p. 1-28 10.3390/healthcare11050744 2227-9032 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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