Cargando…
Lower medial hamstring activity after ACL reconstruction during running: a cross-sectional study
OBJECTIVE: Anterior cruciate ligament reconstruction (ACLR) predisposes footballers for subsequent ACL and hamstring (HS) injury. This case series examines HS muscle activation patterns during the running in ACLR patients (bone-patellar tendon-bone (BTB) and (HS) graft) after completion of functiona...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BMJ Publishing Group
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7957131/ https://www.ncbi.nlm.nih.gov/pubmed/33782638 http://dx.doi.org/10.1136/bmjsem-2020-000875 |
_version_ | 1783664588344000512 |
---|---|
author | Einarsson, Einar Thomson, Athol Sas, Bart Hansen, CLint Gislason, Magnus Whiteley, Rodney |
author_facet | Einarsson, Einar Thomson, Athol Sas, Bart Hansen, CLint Gislason, Magnus Whiteley, Rodney |
author_sort | Einarsson, Einar |
collection | PubMed |
description | OBJECTIVE: Anterior cruciate ligament reconstruction (ACLR) predisposes footballers for subsequent ACL and hamstring (HS) injury. This case series examines HS muscle activation patterns during the running in ACLR patients (bone-patellar tendon-bone (BTB) and (HS) graft) after completion of functional criteria allowing return to training. METHODS: Electromyography (EMG) recorded from medial and lateral HS bilaterally during treadmill running (12, 14 and 16 km/hour) from 21 male ACLR patients on average 7 months from surgery (5-9) that underwent (HS) (n=12) or BTB reconstruction (n=9) were compared with 19 healthy runners. Main outcome measures: EMG signal was normalised to peak during the running. Pairwise comparisons were made for each muscle group examining stance and swing activation for mean and peak EMG for each patient group and leg. RESULTS: Significantly lower relative peak activation in stance (not swing) phase for medial HS was seen for all conditions with effect sizes ranging from −0.63 (controls, BTB non-injured leg) to −1.09 (HS injured). For lateral HS only BTB injured were significantly lower in stance phase (−1.05) CONCLUSION: ACLR patients show neuromuscular alterations during different phases of running. The finding of reduced medial HS activity in stance phase might have implications for knee instability and HS muscle injury on resumption of sport. |
format | Online Article Text |
id | pubmed-7957131 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | BMJ Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-79571312021-03-28 Lower medial hamstring activity after ACL reconstruction during running: a cross-sectional study Einarsson, Einar Thomson, Athol Sas, Bart Hansen, CLint Gislason, Magnus Whiteley, Rodney BMJ Open Sport Exerc Med Short Report OBJECTIVE: Anterior cruciate ligament reconstruction (ACLR) predisposes footballers for subsequent ACL and hamstring (HS) injury. This case series examines HS muscle activation patterns during the running in ACLR patients (bone-patellar tendon-bone (BTB) and (HS) graft) after completion of functional criteria allowing return to training. METHODS: Electromyography (EMG) recorded from medial and lateral HS bilaterally during treadmill running (12, 14 and 16 km/hour) from 21 male ACLR patients on average 7 months from surgery (5-9) that underwent (HS) (n=12) or BTB reconstruction (n=9) were compared with 19 healthy runners. Main outcome measures: EMG signal was normalised to peak during the running. Pairwise comparisons were made for each muscle group examining stance and swing activation for mean and peak EMG for each patient group and leg. RESULTS: Significantly lower relative peak activation in stance (not swing) phase for medial HS was seen for all conditions with effect sizes ranging from −0.63 (controls, BTB non-injured leg) to −1.09 (HS injured). For lateral HS only BTB injured were significantly lower in stance phase (−1.05) CONCLUSION: ACLR patients show neuromuscular alterations during different phases of running. The finding of reduced medial HS activity in stance phase might have implications for knee instability and HS muscle injury on resumption of sport. BMJ Publishing Group 2021-03-11 /pmc/articles/PMC7957131/ /pubmed/33782638 http://dx.doi.org/10.1136/bmjsem-2020-000875 Text en © Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. http://creativecommons.org/licenses/by-nc/4.0/ http://creativecommons.org/licenses/by-nc/4.0/This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/. |
spellingShingle | Short Report Einarsson, Einar Thomson, Athol Sas, Bart Hansen, CLint Gislason, Magnus Whiteley, Rodney Lower medial hamstring activity after ACL reconstruction during running: a cross-sectional study |
title | Lower medial hamstring activity after ACL reconstruction during running: a cross-sectional study |
title_full | Lower medial hamstring activity after ACL reconstruction during running: a cross-sectional study |
title_fullStr | Lower medial hamstring activity after ACL reconstruction during running: a cross-sectional study |
title_full_unstemmed | Lower medial hamstring activity after ACL reconstruction during running: a cross-sectional study |
title_short | Lower medial hamstring activity after ACL reconstruction during running: a cross-sectional study |
title_sort | lower medial hamstring activity after acl reconstruction during running: a cross-sectional study |
topic | Short Report |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7957131/ https://www.ncbi.nlm.nih.gov/pubmed/33782638 http://dx.doi.org/10.1136/bmjsem-2020-000875 |
work_keys_str_mv | AT einarssoneinar lowermedialhamstringactivityafteraclreconstructionduringrunningacrosssectionalstudy AT thomsonathol lowermedialhamstringactivityafteraclreconstructionduringrunningacrosssectionalstudy AT sasbart lowermedialhamstringactivityafteraclreconstructionduringrunningacrosssectionalstudy AT hansenclint lowermedialhamstringactivityafteraclreconstructionduringrunningacrosssectionalstudy AT gislasonmagnus lowermedialhamstringactivityafteraclreconstructionduringrunningacrosssectionalstudy AT whiteleyrodney lowermedialhamstringactivityafteraclreconstructionduringrunningacrosssectionalstudy |