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[{"key": "dc.contributor.advisor", "value": "Ahtiainen, Juha", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Mikala, Oona", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2022-06-22T09:15:29Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2022-06-22T09:15:29Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2022", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/81958", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Hermostollisten tekij\u00f6iden yhteys r\u00e4j\u00e4ht\u00e4v\u00e4\u00e4n voimantuottoon on tunnistettu laajalti aikaisemmissa tutkimuksissa. Poikkileikkaustutkimuksissa sek\u00e4 joissakin pitkitt\u00e4istutkimuksissa my\u00f6s lihasarkkitehtuurin on havaittu olevan yhteydess\u00e4 nopeaan voimantuottoon. R\u00e4j\u00e4ht\u00e4v\u00e4n voimantuoton sek\u00e4 lihasarkkitehtuurin on havaittu adaptoituvan voimaharjoitteluun muutamissa viikoissa. Adaptaatioiden tarkkaa aikakurssia on kuvattu vain harvoissa tutkimuksissa. T\u00e4m\u00e4n opinn\u00e4ytety\u00f6n tarkoitus on selvitt\u00e4\u00e4, kuinka kauan r\u00e4j\u00e4ht\u00e4v\u00e4ll\u00e4 voimantuotolla ja lihasarkkitehtuurilla kest\u00e4\u00e4 adaptaatioitua voimaharjoitteluun, sek\u00e4 onko n\u00e4iden adaptaatioiden v\u00e4lill\u00e4 yhteyksi\u00e4. My\u00f6s harjoitustauon vaikutuksia nopeaan voimatuottoon ja lihasarkkitehtuuriin tarkastellaan. \nKoehenkil\u00f6t ovat aiemmin voimaharjoittelemattomia nuoria naisia ja miehi\u00e4 (n=17, ik\u00e4 28\u00b14,9 vuotta). Seitsem\u00e4n viikon voimaharjoittelu koostuu pienest\u00e4 m\u00e4\u00e4r\u00e4st\u00e4 plyometrisia harjoitteita sek\u00e4 hypertrofisesta voimaharjoittelusta. R\u00e4j\u00e4ht\u00e4v\u00e4\u00e4 voimantuottoa mitataan kevennyshypyn nousukorkeuden sek\u00e4 yhdenjalan polvenojennuksesta m\u00e4\u00e4ritetyn isometrisen r\u00e4j\u00e4ht\u00e4v\u00e4n voimantuoton avulla. Lihasarkkitehtuurimuuttujia mitataan ultra\u00e4\u00e4nikuvantamisella. \nKevennyshypyn nousukorkeus kasvoi seitsem\u00e4ss\u00e4 viikossa 8,3\u00b112,5 % (p<0,05). Harjoitustauon laskevan trendin seurauksena nousukorkeus ei en\u00e4\u00e4 tauon j\u00e4lkeen eronnut l\u00e4ht\u00f6tasosta. Isometrisess\u00e4 r\u00e4j\u00e4ht\u00e4v\u00e4ss\u00e4 voimantuotossa ei havaittu muutoksia. Kaikki seuratut lihasarkkitehtuurimuuttujat adaptoituivat harjoitteluun jo kolmessa ja puolessa viikossa. Koko seitsem\u00e4n viikon harjoitusjakson aikana vastus lateraliksen poikkipinta-ala kasvoi 14,2\u00b15,9 % (p<0,05), lihaspaksuus 9,9\u00b16,5 % (p<0,05) ja pennaatiokulma 22,5\u00b19,3 % (p<0,05). Kaikissa lihasarkkitehtuurimuuttujissa tapahtui merkitt\u00e4v\u00e4 lasku harjoitustauon seurauksena. Viiden viikon harjoittelutauon seurauksena poikkipinta-alan muutos oli -9,0\u00b16,3 % (p<0,05), lihaspaksuuden -8,8\u00b13,4 % (p<0,05) ja pennaatiokulman -20,9\u00b110,4 % (p<0,05). R\u00e4j\u00e4ht\u00e4v\u00e4n voimantuoton harjoitusadaptaatiot eiv\u00e4t olleet yhteydess\u00e4 lihasarkkitehtuurin muutoksiin. \nR\u00e4j\u00e4ht\u00e4v\u00e4n voimantuoton varhaisia adaptaatioita selitt\u00e4v\u00e4t muut tekij\u00e4t kuin lihasarkkitehtuurin muutokset. Kolme ja puoli viikkoa on riitt\u00e4v\u00e4 aika harjoittelusta seuraavien lihasarkkitehtuurin muutosten saavuttamiseksi aiemmin voimaharjoittelemattomilla. Viiden viikon harjoitustauko aiheuttaa kevennyshypyn nousukorkeudessa laskevan trendin sek\u00e4 merkitsev\u00e4n laskun lihasarkkitehtuurin adaptaatioissa.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "The connection between neural properties and explosive strength has been widely demonstrated in previous studies. In cross-sectional as well as in some longitudinal studies muscle architecture has also been reported to be connected to rapid force production. Both explosive strength and muscle architecture has been reported to adapt to training within weeks. However, the precise time-course of adaptations is seldom described. The purpose of this master\u2019s thesis is to examine the time-course of explosive strength and morphological adaptations and possible correlations between those adaptations. The effects of detraining period on training induced adaptations are also studied.\nThe subjects of the study are previously untrained young men and women (n=17, age 28\u00b14.9 years). The 7-week training intervention consists of low volume of plyometric exercises and hypertrophic type strength training. Explosive strength is measured as countermovement jump height and isometric rate of force development. Muscle architecture is studied with ultrasound imaging. \nThe countermovement jump height increased in seven weeks by 8.3\u00b112.5% (p<0.05). Detraining caused a decreasing trend in jump height resulting it to be no longer different from pre-training level. In rate of force development there was no change during the intervention. The cross-sectional area, muscle thickness, and pennation angle of vastus lateralis increased both during the first and latter 3.5 weeks of the intervention. The total increase in response to 7 weeks of training was 14.2\u00b15.9% (p<0.05) for cross-sectional area, 9.9\u00b16.5% (p<0.05) for muscle thickness, and 22.5\u00b19.3% (p<0.05) for pennation angle. There was a significant decrease in all muscle architecture variables in response to detraining. The 5-week detraining period caused a decrease of 9.0\u00b16.3% (p<0.05) in cross-sectional area, a decrease of 8.8\u00b13.4% (p<0.05) in muscle thickness, and a decrease of 20.9\u00b110.4% (p<0.05) in pennation angle. The adaptations of explosive strength didn\u2019t correlate with the adaptations of any of the studied muscle architecture variables. \nThe early adaptations in explosive strength appear to be connected to other aspects than changes in muscle architecture. Three and half weeks is enough to elicit significant training induced adaptations in muscle architecture in previously untrained subjects. Five weeks of detraining causes a decreasing trend in jumping performance and significant decreases in morphological adaptations.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2022-06-22T09:15:29Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2022-06-22T09:15:29Z (GMT). No. of bitstreams: 0\n Previous issue date: 2022", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "71", "language": "", "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": "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": "rate of force development", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "countermovement jump", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "muscle architecture", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "time-course of adaptations", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "training cessation", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Explosive strength and morphological adaptations to 7-week strength training and 5-week detraining", "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-202206223563", "language": "", "element": "identifier", "qualifier": "urn", "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": "Liikunta- ja terveystieteet", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Sport and Health Sciences", "language": "en", "element": "contributor", "qualifier": "department", "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": "Valmennus- ja testausoppi", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Science in Sport Coaching and Fitness Testing", "language": "en", "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": "5013", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "voimaharjoittelu", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "nopeusvoima", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "voimantuotto (fysiologia)", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "strength training", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "explosive strength", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "force production (physiology)", "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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