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[{"key": "dc.contributor.advisor", "value": "Avela, Janne", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Juutinen, Taija", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Laatikainen-Raussi, Iida", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2024-06-13T10:34:11Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2024-06-13T10:34:11Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2024", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/95850", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "The purpose of this master\u2019s thesis was to investigate the reliability of ultrasound elastography (SWE) imaging in passive muscles, changes in the shear modulus (\u201cstiffness\u201d) along the biceps femoris long head (BFlh) muscle length, the architecture of the BFlh (muscle thickness (MT), fascicle length (FL) and pennation angle (PA)) and the relations of these muscle characteristics with performance variables (30 m speed, counter movement jump (CMJ), static jump, Nordic hamstring exercise, isokinetic hamstring:quadriceps-ratio). Hamstring injuries are common and cause a lot of absences, especially in sports involving high-intensity running. The hamstring muscles play a significant role in human movement, as they extend hip, flex knee, and participate in rotating the knee joint. BFlh, which is located laterally on the posterior thigh, is the most often injured hamstring muscle. \nUltrasound elastography (SWE) is a relatively new technology to evaluate tissue stiffness. The technique is based on the detection of shear waves; the propagation is faster the stiffer the medium. The validity and reliability of SWE in muscle and tendon imaging has been studied, but re-porting varies. Mainly, it has been found to be a valid and reliable method, but it has its own limitations. All ultrasound measurements in this study were performed in one measurement session at rest. Participants of the study were female football (soccer) players (N=29).\nThe reliabilities of the ultrasound measurements (SWE and architectural measurements) were good to excellent (ICC for SWE 0.854, p=0.000; PA 0.935, p=0.000; FL 0.963, p=0.000 and MT 0.982, p=0.000). There were statistically significant differences in shear modulus along the BFlh in the right but not in the left leg. No high correlations were found between muscle architecture, shear modulus and performance variables. Some statistically significant moderate and low correlations were found, as relevant ones shear modulus and 30 meters sprint time (0.450, p < 0.05), fascicle length and jump performance (CMJ 0.379, static jump 0.441, p < 0.05).\nThe SWE measurements within the measurement session proved to be reliable, but the SWE measurement technology and analysis methods contain their own weaknesses. In the future, SWE may be a useful tool when monitoring muscle injury prevention and rehabilitation programs. Reliable comparisons between ultrasound measurements and performance variables re-quire more precisely scheduled measurements and additional measurement methods (such as EMG) to support the findings. Imaging shear modulus closer to the muscle-tendon junctions could show greater intra-muscular differences in SWE measurements.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4m\u00e4n pro-gradu tutkielman tarkoituksena oli selvitt\u00e4\u00e4 ultra\u00e4\u00e4nielastografian (SWE) reliabiliteettia passiivista lihasta kuvattaessa, biceps femoriksen pitk\u00e4n p\u00e4\u00e4n (BFlh) shear modulusta (\u201dj\u00e4ykkyytt\u00e4\u201d) pitkin lihaspituutta, BFlh:n arkkitehtuuria (lihaspaksuus (MT), fasikkelipituus (FL) ja pennaatiokulma (PA)) ja n\u00e4iden lihasominaisuuksien yhteyksi\u00e4 suorituskykymuuttujiin (30 m nopeus, kevennyshyppy, kyykkyhyppy, Nordic hamstring -liike, isokineettinen takareisi:etureisi -suhde). Takareisivammat ovat hyvin yleisi\u00e4 ja aiheuttavat paljon poissaoloja erityisesti kovatehoisia juoksusuorituksia sis\u00e4lt\u00e4viss\u00e4 lajeissa. Takareiden lihakset ovat merkitt\u00e4v\u00e4ss\u00e4 roolissa ihmisen jokap\u00e4iv\u00e4isess\u00e4 liikkumisessa, sill\u00e4 ne ojentavat lonkkaa, koukistavat polvea ja osallistuvat my\u00f6s polvinivelt\u00e4 kiert\u00e4viin liikkeisiin. Yleisimmin loukkaantuva lihas on nimenomaan BFlh, joka sijaitsee lateraalisesti reiden takaosassa. \nUltra\u00e4\u00e4nielastografia (SWE) on hiljattain yleistynyt kuvantamisteknologia, jolla voidaan arvioida kudoksen j\u00e4ykkyytt\u00e4. Menetelm\u00e4 perustuu leikkausaaltojen havaitsemiseen, joiden eteneminen on nopeampaa mit\u00e4 j\u00e4ykemm\u00e4ss\u00e4 v\u00e4liaineessa ne etenev\u00e4t. SWE:n validiteettia ja reliabiliteettia lihasten ja j\u00e4nteiden kuvantamisessa on tutkittu, mutta raportointi on vaihtelevaa. P\u00e4\u00e4osin menetelm\u00e4n on todettu olevan validi ja luotettava, mutta sill\u00e4 on omat rajoitteensa. Kaikki t\u00e4m\u00e4n tutkimuksen ultra\u00e4\u00e4nimittaukset suoritettiin yhdell\u00e4 mittauskerralla levossa. Tutkittavat olivat naisjalkapalloilijoita (N=29).\nUltra\u00e4\u00e4nimittausten (SWE ja arkkitehtuurimittaukset) reliabiliteetti oli hyv\u00e4\u2013erinomainen (ICC SWE 0.854, p=0.000; PA 0.935, p=0.000; FL 0.963, p=0.000 ja MT 0.982, p=0.000). Shear moduluksessa pitkin BFlh:ta oli tilastollisesti merkitsevi\u00e4 eroja oikeassa, mutta ei vasemmassa jalassa. Muiden lihasominaisuuksien ja kudosj\u00e4ykkyyden ja suorituskykymuuttujien v\u00e4lill\u00e4 ei havaittu korkeita korrelaatioita. Joitakin tilastollisesti merkitsevi\u00e4 kohtalaisia ja matalia korrelaatioita havaittiin, olennaisimpina shear modulus ja 30 m sprinttiaika (0.450, p < 0.05), fasikkelipituus ja hyppysuorituskyky (CMJ 0.379, kyykkyhyppy 0.441, p < 0.05).\nSWE-mittaukset mittauskerran sis\u00e4ll\u00e4 osoittautuivat luotettaviksi, mutta menetelm\u00e4n mittaus- ja analysointimenetelm\u00e4t sis\u00e4lt\u00e4v\u00e4t omat heikkoutensa. SWE voi olla tulevaisuudessa k\u00e4ytt\u00f6kelpoinen apuv\u00e4line lihasvammojen ehk\u00e4isyn ja kuntoutuksen monitoroinnissa. Luotettavat vertailut ultra\u00e4\u00e4nimittausten ja suorituskykymuuttujien v\u00e4lill\u00e4 vaativat t\u00e4sm\u00e4llisemmin ajoitettuja mittauksia ja mahdollisesti muita mittausmenetelmi\u00e4 (kuten EMG) tuekseen. SWE-kuvantaminen l\u00e4hemp\u00e4\u00e4 lihasj\u00e4nneliitoksia voisi tuoda suurempia eroja shear modulukseen BFlh:n sis\u00e4ll\u00e4, ja kertoa n\u00e4in lihaksen sis\u00e4isist\u00e4 ominaisuuksista enemm\u00e4n.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2024-06-13T10:34:11Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2024-06-13T10:34:11Z (GMT). No. of bitstreams: 0\n Previous issue date: 2024", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "74", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "elastografia", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "takareidet", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "lihasarkkitehtuuri", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Biceps Femoris long head Architecture and Passive Tissue Stiffness and Their Relations to Performance Variables", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202406134616", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sport and Health Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Liikuntatieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Sport and Health Sciences", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Liikunta- ja terveystieteet", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Biomechanics", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Biomekaniikka", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "5012", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "reliabiliteetti", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "lihakset", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "biomekaniikka", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ultra\u00e4\u00e4ni", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "reliability (science)", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "muscles", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "biomechanics", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ultrasound", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
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