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[{"key": "dc.contributor.author", "value": "Romppainen, Matti", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2012-12-10T11:57:54Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2012-12-10T11:57:54Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2012", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1239874", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/40554", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4m\u00e4 tutkimus tarkasteli ik\u00e4\u00e4ntymisen vaikutuksia sisemm\u00e4n kaksoiskantalihaksen, leve\u00e4n kantalihaksen ja etummaisen s\u00e4\u00e4rilihaksen mekaanisiin ominaisuuksiin passiivisen venytyksen aikana. Oletusta ik\u00e4\u00e4ntymisen aiheuttamasta muutoksesta lihaksen ja j\u00e4nteen suhteellisessa venym\u00e4ss\u00e4 tutkittiin ultra\u00e4\u00e4nen avulla. Lis\u00e4ksi tarkasteltiin, miten pitk\u00e4aikainen liikunnan harrastaminen vaikuttaa ik\u00e4\u00e4ntyneen lihas-j\u00e4nnekompleksin ominaisuuksiin. Koehenkil\u00f6ryhm\u00e4t olivat nuoret (N=12; 27,8 \u00b1 3,2 v), ik\u00e4\u00e4ntyneet (N=15; 69,4 \u00b1 5,3 v) ja veteraaniurheilijat (N16; 73,3 \u00b1 2,8 v).\n\nMittausasetelmassa koehenkil\u00f6iden oikea jalka kiinnitettiin jalkadynamometriin, jossa s\u00e4\u00e4ren lihaksia venytettiin nilkkakulmaa muuttamalla. Ultra\u00e4\u00e4nianturin avulla tarkasteltiin lihassolukimppujen pituuden muutoksia passiivisen venytyksen aikana. Passiivisten venytysten lis\u00e4ksi lihassolukimppujen pituuden muutoksia tarkasteltiin maksimaalisen isometrisen lihassupistuksen aikana. \n\nUltra\u00e4\u00e4nidatasta lihassolukimppujen pituuden muutokset saatiin automatisoidun seurantaohjelmiston (Cronin ym. 2011) avulla. Koko lihas-j\u00e4nnekompleksin pituudet m\u00e4\u00e4ritettiin Hawkins ja Hull (1990) mallia apuna k\u00e4ytt\u00e4en. J\u00e4nne-aponeuroosikompleksin pituuden muutokset laskettiin v\u00e4hent\u00e4m\u00e4ll\u00e4 lihas-j\u00e4nnekompleksin kokonaispituudesta supistuvan komponentin pituus. Lihas-j\u00e4nnekompleksien eri komponenttien pituuden muutoksia vertailtiin eri ryhmien v\u00e4lill\u00e4. \n\nTutkimuksessa ei havaittu tilastollisesti merkitsevi\u00e4 eroja ryhmien v\u00e4lill\u00e4 lihaksen ja j\u00e4nteen suhteellisissa venym\u00e4osuuksissa lihas-j\u00e4nnekompleksin toiminnallisella alueella. Leve\u00e4ss\u00e4 kantalihaksessa ik\u00e4\u00e4ntyneill\u00e4 lihaksen suhteellinen venym\u00e4osuus oli selv\u00e4sti muita ryhmi\u00e4 suurempi passiivisen venytyksen aikana. Tilastollisesti merkitsevi\u00e4 eroja (p<0,05) oli leve\u00e4ss\u00e4 kantalihaksessa lihaksen ja j\u00e4nteen venymiss\u00e4 ik\u00e4\u00e4ntyneiden (67,6 \u00b1 20,4 %, 34,3 \u00b1 19,8 %) ja veteraaniurheilijoiden (54,1 \u00b1 13,6 %, 47,0 \u00b1 13,2 %) v\u00e4lill\u00e4, my\u00f6s nuorten venym\u00e4osuudet (56,0 \u00b1 14,7 %, 45,7 \u00b1 13,2 %) erosivat selv\u00e4sti ik\u00e4\u00e4ntyneist\u00e4, mutta erot eiv\u00e4t olleet merkitsevi\u00e4. Lihas-j\u00e4nnekompleksien suhteellisissa venym\u00e4osuuksissa oli havaittavissa yht\u00e4l\u00e4isyyksi\u00e4 nuorten ja veteraaniurheilijoiden v\u00e4lill\u00e4 my\u00f6s etummaisessa s\u00e4\u00e4rilihaksessa.\n \nMaksimaalisen isometrisen lihassupistuksen aikana kaksoiskantalihaksen pituuden muutos oli suurempi nuorilla (31,1 \u00b1 7,2 %) kuin i\u00e4kk\u00e4ill\u00e4 (25,2 \u00b1 7,5 %) (p<0,05). My\u00f6s lihassupistuksen aikaiset voimantuottotasot erosivat ryhmien v\u00e4lill\u00e4 (p<0,05), ik\u00e4\u00e4ntyneiden voimantuoton ollessa selv\u00e4sti pienempi kuin muilla ryhmill\u00e4.\n\nT\u00e4m\u00e4 tutkimus antaa viitteit\u00e4 siit\u00e4, ett\u00e4 pitk\u00e4aikaisen ja s\u00e4\u00e4nn\u00f6llisen liikunnan avulla voidaan yll\u00e4pit\u00e4\u00e4 lihas-j\u00e4nnekompleksin ominaisuuksia. Lis\u00e4ksi tulosten perus-teella voidaan varauksella sanoa, ett\u00e4 ik\u00e4\u00e4ntyminen vaikuttaa enemm\u00e4n lihaksen passiivisiin ominaisuuksiin.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Matti Romppainen (maolromp) on 2012-12-10 11:57:53.527405. 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 2012-12-10T11:57:54Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201212103324.pdf: 1209275 bytes, checksum: d6bb7ac9084b908acf2e613dad8c0a23 (MD5)\nlicense.html: 5044 bytes, checksum: 1f793b4d77952eea802885977644266a (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2012-12-10T11:57:54Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201212103324.pdf: 1209275 bytes, checksum: d6bb7ac9084b908acf2e613dad8c0a23 (MD5)\nlicense.html: 5044 bytes, checksum: 1f793b4d77952eea802885977644266a (MD5)\n Previous issue date: 2012", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "65 sivua", "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": "isometrinen lihassupistus", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "lihas-j\u00e4nnekompleksi", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Ik\u00e4\u00e4ntymisen vaikutukset lihaksen ja j\u00e4nteen suhteelliseen venym\u00e4\u00e4n passiivisen venytyksen aikana", "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-201212103324", "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", 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