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[{"key": "dc.contributor.author", "value": "Toivonen, Johanna", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2013-09-12T10:30:17Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2013-09-12T10:30:17Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2013", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1279825", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/42142", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "J\u00e4nnekudokset ovat suuressa merkityksess\u00e4 liikkumisessa sill\u00e4 ne v\u00e4litt\u00e4v\u00e4t lihassupistuksen aiheuttaman voiman luihin sek\u00e4 lis\u00e4ksi toimivat liikkumisen tehokkuuden parantajina s\u00e4il\u00f6m\u00e4ll\u00e4 ja vapauttamalla elastista energiaa. J\u00e4nteen k\u00e4ytt\u00e4ytyminen ja mekaaniset ominaisuudet vaikuttavat koko lihas-j\u00e4nneyksik\u00f6n toimintaan. Venytyksen aiheuttaman elastisen energian s\u00e4il\u00f6mis- ja varastoimiskyky on yksin j\u00e4nteen t\u00e4rkeimmist\u00e4\nominaisuuksista, sill\u00e4 se parantaa liikkumisen taloudellisuutta. Hukkaenergian eli hystereesin m\u00e4\u00e4r\u00e4 on t\u00e4m\u00e4n ominaisuuden t\u00e4rke\u00e4 mittari. T\u00e4m\u00e4n tutkimuksen tarkoituksena \noli validoida j\u00e4nteiden hystereesin m\u00e4\u00e4rityksess\u00e4 k\u00e4ytetty\u00e4 ultra\u00e4\u00e4nimenetelm\u00e4\u00e4, ja tarkastella vastaisiko hystereesin avulla laskettu j\u00e4nteen teoreettinen l\u00e4mpeneminen l\u00e4mp\u00f6kameralla mitattua todellista l\u00e4mpenemist\u00e4.\nTutkimukseen osallistui 11 nuorta miest\u00e4 (25,5 \u00b1 3,8 vuotta), jotka osallistuivat kahteen eri mittauskertaan. Ensimm\u00e4isell\u00e4 mittauskerralla oikean jalan akillesj\u00e4nteen l\u00e4mpenemist\u00e4 seurattiin nilkkadynamometriss\u00e4 tuotettujen isometristen nilkanojennussuoritusten (15 toistoa, 80 % MVC) aikana l\u00e4mp\u00f6kameran avulla. L\u00e4mp\u00f6tilan muutosta seurattiin ennen isometristen supistusten alkua, niiden aikana ja j\u00e4lkeen yhteens\u00e4 \nviiden minuutin ajan. L\u00e4mp\u00f6kameravideot analysoitiin pinta-alaty\u00f6kalun avulla, jolla\nrajattiin 60 % vapaasta j\u00e4nteest\u00e4. Toisella mittauskerralla m\u00e4\u00e4ritettiin koehenkil\u00f6iden\nakillesj\u00e4nteen voima-muodonmuutosk\u00e4ytt\u00e4ytyminen samoin tuotettujen isometristen \nnilkanojennusten aikana. Menetelm\u00e4ss\u00e4 yhdistettiin ultra\u00e4\u00e4nimittaukset lihasj\u00e4nneliitoksen paikan seuraamiseen, 2D-liikeanalyysi ultra\u00e4\u00e4nianturin liikkeen seuraamiseen, kantap\u00e4\u00e4n liikkeen huomioiminen sek\u00e4 voimadata.\nTutkimuksessa havaittiin l\u00e4mp\u00f6kameralla mitatun todellisen l\u00e4mp\u00f6tilan\nmuutoksen ennen ja j\u00e4lkeen isometristen suoritusten olevan 0,311 \u00b1 0,2 astetta. Tutkimuksessa akillesj\u00e4nteen hystereesi oli keskim\u00e4\u00e4rin 8,9 \u00b1 8,9 % ja sen perusteella laskettu teoreettinen j\u00e4nteen l\u00e4mpeneminen olisi ollut 0,314 \u00b1 0,3 astetta. Todellinen ja teoreettinen l\u00e4mp\u00f6tilan muutos vastasivat toisiaan, sill\u00e4 niiden v\u00e4lill\u00e4 ei havaittu tilastollisesti merkitsev\u00e4\u00e4 eroa. Tutkimuksessa havaittiin my\u00f6s hystereesin ja todellisen l\u00e4mp\u00f6tilan muutoksen v\u00e4lill\u00e4 selv\u00e4 yhteys (r = 0,711, p = 0,032).\nTutkimuksen perusteella n\u00e4ytt\u00e4isi silt\u00e4, ett\u00e4 l\u00e4mp\u00f6kamera soveltuisi j\u00e4nteen hystereesin m\u00e4\u00e4ritt\u00e4miseen, sill\u00e4 teoreettisen ja todellisen l\u00e4mp\u00f6tilan muutoksen\nv\u00e4lill\u00e4 ei havaittu eroa ja hystereesi korreloi vahvasti todellisen l\u00e4mp\u00f6tilan muutoksen\nkanssa. Korrelaatio havaittiin aineiston suhteellisen suuresta hajonnasta huolimatta, mik\u00e4 kertoneen yksil\u00f6iden v\u00e4lill\u00e4 olevan runsaasti fysiologista vaihtelua j\u00e4nteiden ominaisuuksissa.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Johanna Toivonen (jomatoiv) on 2013-09-12 10:30:15.347063. Form: Pro gradu -lomake (1 tekij\u00e4) (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake-1-tekijae). JyX data:", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija@noreply.fi) on 2013-09-12T10:30:17Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201309122282.pdf: 1050511 bytes, checksum: 3e8b4cb809475b157c140fffbf9d991c (MD5)\nlicense.html: 107 bytes, checksum: a7d86e598caa500b1b433bbb9dc8ef1c (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2013-09-12T10:30:17Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201309122282.pdf: 1050511 bytes, checksum: 3e8b4cb809475b157c140fffbf9d991c (MD5)\nlicense.html: 107 bytes, checksum: a7d86e598caa500b1b433bbb9dc8ef1c (MD5)\n Previous issue date: 2013", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto.", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "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": "hystereesi", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Akillesj\u00e4nteen hystereesi l\u00e4mp\u00f6kameralla mitattuna", "language": null, "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-201309122282", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.dcmitype", "value": "Text", "language": "en", "element": "type", "qualifier": "dcmitype", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Liikuntatieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sport and Health Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Liikuntabiologian laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Biology of Physical Activity", "language": "en", "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": "Biomekaniikka", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Biomechanics", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.date.updated", "value": "2013-09-12T10:30:17Z", "language": null, "element": "date", "qualifier": "updated", "schema": "dc"}, {"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": "fi", "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": "kantaj\u00e4nne", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "j\u00e4nteet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ultra\u00e4\u00e4nitutkimus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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