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dc.contributor.authorMalliaropoulos, Nikos
dc.contributor.authorPanagiotis, Tsaklis
dc.contributor.authorJurdan, Mendiguchia
dc.contributor.authorVasilis, Korakakis
dc.contributor.authorDebasish, Pyne
dc.contributor.authorPeter, Malliaras
dc.contributor.authorTsapralis, Kyriakos
dc.date.accessioned2015-08-19T18:01:28Z
dc.date.available2015-08-19T18:01:28Z
dc.date.issued2015-06
dc.identifier.issn1179-1543
dc.identifier.urihttp://hdl.handle.net/1721.1/98107
dc.description.abstractBackground: Hamstring injuries are common in many sports, including track and field. Strains occur in different parts of the hamstring muscle but very little is known about whether common hamstring loading exercises specifically load different hamstring components. The purpose of this study was to investigate muscle activation of different components of the hamstring muscle during common hamstring loading exercises. Methods: Twenty elite female track and field athletes were recruited into this study, which had a single-sample, repeated-measures design. Each athlete performed ten hamstring loading exercises, and an electromyogram (EMG) was recorded from the biceps femoris and semitendinosus components of the hamstring. Hamstring EMG during maximal voluntary isometric contraction (MVIC) was used to normalize the mean data across ten repetitions of each exercise. An electrogoniometer synchronized to the EMG was used to determine whether peak EMG activity occurred during muscle-tendon unit lengthening, shortening, or no change in length. Mean EMG values were compared between the two recording sites for each exercise using the Student’s t-test. Results: The lunge, dead lift, and kettle swings were low intensity (<50% MVIC) and all showed higher EMG activity for semitendinosus than for biceps femoris. Bridge was low but approaching medium intensity, and the TRX, hamstring bridge, and hamstring curl were all medium intensity exercises (≥50% or <80% MVIC). The Nordic, fitball, and slide leg exercises were all high intensity exercises. Only the fitball exercise showed higher EMG activity in the biceps femoris compared with the semitendinosus. Only lunge and kettle swings showed peak EMG in the muscle-tendon unit lengthening phase and both these exercises involved faster speed. Conclusion: Some exercises selectively activated the lateral and medial distal hamstrings. Low, medium, and high intensity exercises were demonstrated. This information enables the clinician, strength and conditioning coach and physiotherapist to better understand intensity- and muscle-specific activation during hamstring muscle rehabilitation. Therefore, these results may help in designing progressive strengthening and rehabilitation and prevention programs.en_US
dc.language.isoen_US
dc.publisherDove Medical Pressen_US
dc.relation.isversionofhttp://dx.doi.org/10.2147/oajsm.s79189en_US
dc.rightsCreative Commons Attributionen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc/3.0/en_US
dc.sourceDove Medical Pressen_US
dc.titleMuscle and intensity based hamstring exercise classification in elite female track and field athletes: implications for exercise selection during rehabilitationen_US
dc.typeArticleen_US
dc.identifier.citationMalliaropoulos, Nikos, Tsaklis Panagiotis, Mendiguchia Jurdan, Korakakis Vasilis, Pyne Debasish, Malliaras Peter, and Kyriakos Tsapralis. “Muscle and Intensity Based Hamstring Exercise Classification in Elite Female Track and Field Athletes: Implications for Exercise Selection During Rehabilitation.” Open Access Journal of Sports Medicine (June 2015): 209.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Mechanical Engineeringen_US
dc.contributor.mitauthorPanagiotis, Tsaklisen_US
dc.relation.journalOpen Access Journal of Sports Medicineen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsMalliaropoulos, Nikos; Panagiotis, Tsaklis; Jurdan, Mendiguchia; Vasilis, Korakakis; Debasish, Pyne; Peter, Malliaras; Tsapralis, Kyriakosen_US
mit.licensePUBLISHER_CCen_US
mit.metadata.statusComplete


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