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[{"key": "dc.contributor.advisor", "value": "Avela, Janne", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Meuronen, Ville", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2025-06-19T13:24:23Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2025-06-19T13:24:23Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2025", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/103831", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Lentopallo on joukkuelaji, jossa yksil\u00f6n kyky ly\u00f6d\u00e4 kova iskuly\u00f6nti on oleellisessa osassa pisteen tekemisess\u00e4 joukkueelle. Iskuly\u00f6nti on yliolan liike, jonka liikeketjussa on uniikkeja piirteit\u00e4 muihin ly\u00f6nti- ja heittolajeihin verrattuna. T\u00e4rke\u00e4\u00e4 on liikeketjun toteutus oikeassa kehonosien liikkumisj\u00e4rjestyksess\u00e4, jolloin koko keho toimii yhteisty\u00f6ss\u00e4. Liikeketjun toteutukseen vaikuttavat varsinkin lihasty\u00f6, liikkeest\u00e4 aiheutuvat vuorovaikutukset ja kehon py\u00f6rimism\u00e4\u00e4r\u00e4. Osuma palloon on t\u00f6rm\u00e4ys, joten maksimaalisen ly\u00f6ntinopeuden kannalta t\u00e4rkeint\u00e4 on maksimoida t\u00f6rm\u00e4ysvoima.\n\nTutkimukseen rekrytoitiin 16-18-vuotiaita juniorilentopalloilijoita (n = 20), joista 9 oli tytt\u00f6j\u00e4 ja 11 poikia. Tutkittavat l\u00f6iv\u00e4t iskuly\u00f6ntej\u00e4 maksimaalisella nopeudella. Iskuly\u00f6nneist\u00e4 tehtiin Vicon-kameraj\u00e4rjestelm\u00e4n avulla liike-analyysi, josta saatiin selville nivelkulmia, kulmanopeuksia, kulmakiihtyvyyksi\u00e4, lineaarisia nopeuksia ja n\u00e4iden ajoituksia. Tutkimuksessa selvitettiin n\u00e4iden muuttujien korrelaatioita pallon nopeuteen.\n\nLy\u00f6ntien nopeudet olivat keskim\u00e4\u00e4rin 68 km/h tyt\u00f6ill\u00e4 ja 90 km/h pojilla. Molemmilla t\u00e4rke\u00e4ksi todettiin suuremmat yl\u00e4vartalon koukistuksen (tyt\u00f6t 372 \u00b1 101 \u00b0/s, pojat 389 \u00b1 92 \u00b0/s) ja oikean polven ojennuksen maksimikulmanopeudet (336 \u00b1 222 \u00b0/s, 875 \u00b1 202 \u00b0/s) sek\u00e4 suuremmat olkavarren (8,7 \u00b1 0,9 m/s, 10,8 \u00b1 0,8 m/s), kyyn\u00e4rvarren (11,3 \u00b1 0,8 m/s, 13,5 \u00b1 0,7 m/s) ja k\u00e4mmenen (13,4 \u00b1 0,8 m/s, 16,0 \u00b1 0,8 m/s) maksimaaliset lineaariset nopeudet. Tytt\u00f6jen tuloksissa korostui lis\u00e4ksi hyppykorkeuden (39,4 \u00b1 4,6 cm), suurempien liikeratojen ja pallo-osuman aikaisten olkap\u00e4\u00e4n ja olkavarren lineaarisen nopeuden merkitys. Poikien osalta varsinkin pallo-osuman aikaiset kyyn\u00e4rvarren ja k\u00e4mmenen lineaariset nopeudet olivat t\u00e4rkeit\u00e4. Sen sijaan pallo-osuman aikaiset kulmanopeudet eiv\u00e4t olleet yhteydess\u00e4 suurempaan iskuly\u00f6nnin nopeuteen.\n\nTulokset korostavat koko kehon hy\u00f6dynt\u00e4mist\u00e4 iskuly\u00f6nnin nopeuden kehitt\u00e4misess\u00e4. Yl\u00e4- ja alavartalo tekev\u00e4t ty\u00f6ns\u00e4, joka mahdollistaa ly\u00f6ntik\u00e4den nopeuden kiihtymisen. Koko kehon hy\u00f6dynt\u00e4minen aiheuttaa haasteen ajoittaa liikeketjun toiminta oikein, mik\u00e4 korostaa taidon merkityst\u00e4. Pelaajalla on oltava sek\u00e4 taitoa ett\u00e4 fyysist\u00e4 suorituskyky\u00e4 pysty\u00e4kseen ly\u00f6m\u00e4\u00e4n kova iskuly\u00f6nti erilaisissa pelitilanteissa.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija.group@korppi.jyu.fi) on 2025-06-19T13:24:23Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2025-06-19T13:24:23Z (GMT). No. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "112", "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": "CC BY 4.0", "language": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.title", "value": "Iskuly\u00f6nnin biomekaaninen analyysi", "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-202506195606", "language": null, "element": "identifier", "qualifier": "urn", "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.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Biomekaniikan opintosuunta", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Specialisation in Biomechanics", "language": "en", "element": "subject", "qualifier": "discipline", "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.copyright", "value": "\u00a9 The Author(s)", "language": null, "element": "rights", "qualifier": "copyright", "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.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://creativecommons.org/licenses/by/4.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.description.accessibilityfeature", "value": "ei tietoa saavutettavuudesta", "language": "fi", "element": "description", "qualifier": "accessibilityfeature", "schema": "dc"}, {"key": "dc.description.accessibilityfeature", "value": "unknown accessibility", "language": "en", "element": "description", "qualifier": "accessibilityfeature", "schema": "dc"}]
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