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Alterations in neuromuscular function in girls with generalized joint hypermobility

BACKGROUND: Generalized Joint Hypermobility (GJH) is associated with increased risk of musculoskeletal joint pain. We investigated neuromuscular performance and muscle activation strategy. METHODS: Girls with GJH and non-GJH (NGJH) performed isometric knee flexions (90°,110°,130°), and extensions (9...

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Autores principales: Jensen, Bente Rona, Sandfeld, Jesper, Melcher, Pia Sandfeld, Johansen, Katrine Lyders, Hendriksen, Peter, Juul-Kristensen, Birgit
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5048689/
https://www.ncbi.nlm.nih.gov/pubmed/27716255
http://dx.doi.org/10.1186/s12891-016-1267-5
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author Jensen, Bente Rona
Sandfeld, Jesper
Melcher, Pia Sandfeld
Johansen, Katrine Lyders
Hendriksen, Peter
Juul-Kristensen, Birgit
author_facet Jensen, Bente Rona
Sandfeld, Jesper
Melcher, Pia Sandfeld
Johansen, Katrine Lyders
Hendriksen, Peter
Juul-Kristensen, Birgit
author_sort Jensen, Bente Rona
collection PubMed
description BACKGROUND: Generalized Joint Hypermobility (GJH) is associated with increased risk of musculoskeletal joint pain. We investigated neuromuscular performance and muscle activation strategy. METHODS: Girls with GJH and non-GJH (NGJH) performed isometric knee flexions (90°,110°,130°), and extensions (90°) at 20 % Maximum Voluntary Contraction, and explosive isometric knee flexions while sitting. EMG was recorded from knee flexor and extensor muscles. RESULTS: Early rate of torque development was 53 % faster for GJH. Reduced hamstring muscle activation in girls with GJH was found while knee extensor and calf muscle activation did not differ between groups. Flexion-extension and medial-lateral co-activation ratio during flexions were higher for girls with GJH than NGJH girls. CONCLUSIONS: Girls with GJH had higher capacity to rapidly generate force than NGJH girls which may reflect motor adaptation to compensate for hypermobility. Higher medial muscle activation indicated higher levels of medial knee joint compression in girls with GJH. Increased flexion-extension co-activation ratios in GJH were explained by decreased agonist drive to the hamstrings.
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spelling pubmed-50486892016-10-11 Alterations in neuromuscular function in girls with generalized joint hypermobility Jensen, Bente Rona Sandfeld, Jesper Melcher, Pia Sandfeld Johansen, Katrine Lyders Hendriksen, Peter Juul-Kristensen, Birgit BMC Musculoskelet Disord Research Article BACKGROUND: Generalized Joint Hypermobility (GJH) is associated with increased risk of musculoskeletal joint pain. We investigated neuromuscular performance and muscle activation strategy. METHODS: Girls with GJH and non-GJH (NGJH) performed isometric knee flexions (90°,110°,130°), and extensions (90°) at 20 % Maximum Voluntary Contraction, and explosive isometric knee flexions while sitting. EMG was recorded from knee flexor and extensor muscles. RESULTS: Early rate of torque development was 53 % faster for GJH. Reduced hamstring muscle activation in girls with GJH was found while knee extensor and calf muscle activation did not differ between groups. Flexion-extension and medial-lateral co-activation ratio during flexions were higher for girls with GJH than NGJH girls. CONCLUSIONS: Girls with GJH had higher capacity to rapidly generate force than NGJH girls which may reflect motor adaptation to compensate for hypermobility. Higher medial muscle activation indicated higher levels of medial knee joint compression in girls with GJH. Increased flexion-extension co-activation ratios in GJH were explained by decreased agonist drive to the hamstrings. BioMed Central 2016-10-03 /pmc/articles/PMC5048689/ /pubmed/27716255 http://dx.doi.org/10.1186/s12891-016-1267-5 Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Jensen, Bente Rona
Sandfeld, Jesper
Melcher, Pia Sandfeld
Johansen, Katrine Lyders
Hendriksen, Peter
Juul-Kristensen, Birgit
Alterations in neuromuscular function in girls with generalized joint hypermobility
title Alterations in neuromuscular function in girls with generalized joint hypermobility
title_full Alterations in neuromuscular function in girls with generalized joint hypermobility
title_fullStr Alterations in neuromuscular function in girls with generalized joint hypermobility
title_full_unstemmed Alterations in neuromuscular function in girls with generalized joint hypermobility
title_short Alterations in neuromuscular function in girls with generalized joint hypermobility
title_sort alterations in neuromuscular function in girls with generalized joint hypermobility
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5048689/
https://www.ncbi.nlm.nih.gov/pubmed/27716255
http://dx.doi.org/10.1186/s12891-016-1267-5
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