| fullrecord |
[{"key": "dc.contributor.advisor", "value": "Avela, Janne", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Stenroth, Lauri", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Hellman, Ellen", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2023-04-21T06:43:28Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2023-04-21T06:43:28Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2023", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/86487", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Alppihiihto on yksi maailman suosituimmista talviurheilulajeista. Alppihiihtoa voidaan pit\u00e4\u00e4 my\u00f6s extreme lajina, ja sen tiedet\u00e4\u00e4n olevan my\u00f6s laji, jossa on suuri loukkaantumisriski (Maes et al. 2002). Mono on yksi alppihiihdon t\u00e4rkeimpi\u00e4 varusteita, sill\u00e4 se toimii laskijan ja suksien v\u00e4lisen\u00e4 liitoskohtana, joka siirt\u00e4\u00e4 voimat laskijasta suksiin. Voimansiirtoon vaikuttavat vahvasti monojen mekaaniset ominaisuudet, jotka puolestaan vaikuttavat laskuun ja turvallisuuteen (Hasler ym. 2019). Vaikka varusteilla on suuri merkitys alppihiihdossa, on julkaistuja tutkimuksia varusteista saatavilla suhteellisen v\u00e4h\u00e4n. Tutkimuksen p\u00e4\u00e4tarkoitus oli tutkia miten mono vaikuttaa polven rotaatiomomenttehin akuutisti simuloidun perturbaation seurauksena. Lis\u00e4ksi tutkittiin monon vaikutusta polven adduktiomomentteihin sek\u00e4 fleksiokulmiin.\nSeitsem\u00e4ntoista tervett\u00e4 (11 miest\u00e4, 6 naista), kansallisen tason alppihiiht\u00e4j\u00e4\u00e4 (ik\u00e4 16,8 \u00b1 2,1 vuotta, pituus 173,1 \u00b1 10,6 cm, paino 68,4 \u00b1 14,1 kg) rekrytoitiin yhteisty\u00f6ss\u00e4 Kuopion seudun urheiluakatemian kanssa paikallisesta alppilukiosta sek\u00e4 paikallisesta alppihiihtoseurasta. Mittaukset tehtiin instrumentoidulla juoksumatolla ja mittauksista suoritettiin 3D- liikkeanalyysi. Mittausprotokollaan kuului 10 perturbaatiota, jotka suoritettiin paljain jaloin sek\u00e4 monot jalassa eri suuntiin (posteriori-, mediaali- ja lateraalisuuntaan) eri nopeuksilla (hidas tai nopea).\nAbsoluuttinen maksimaalinen rotaatiomomentti, adduktiomomentti ja fleksiokulma sek\u00e4 absoluuttinen maksimaalinen muutos alkuasennosta 150 ms:iin laskettiin 10 perturbaation keskiarvoista. Maksimiarvoista ja muutosarvoista laskettiin keskiarvot sek\u00e4 keskihajonnat. Paljain jaloin tehtyjen testien ja monoilla tehtyjen testien maksimaalisia arvoja sek\u00e4 muutosarvoja vertailtiin.\nTutkimuksen p\u00e4\u00e4tulosten mukaan tilastollisesti merkitsevi\u00e4 eroja polven rotaatiomomenteissa paljain jaloin ja monot jalassa tehdyiss\u00e4 testeiss\u00e4 ei l\u00f6ydetty kuin maksimaalisessa muutosarvossa posteriorisessa perturbaatiossa. Polven adduktiomomenttien muutosarvoissa havaittiin tilastollisesti merkitsevi\u00e4 eroja kaikissa perturbaatiosuunnissa. Polven maksimi adduktiomomenteissa ei puolestaan havaittu tilastollisesti merkitsevi\u00e4 eroja. Polven maksimi fleksiokulmissa havaittiin tilastollisesti merkitsevi\u00e4 eroja sen sijaan kaikissa perturbaatiosuunnissa sek\u00e4 muutosarvossa posteriorisessa perturbaatiosuunnassa.\nTutkimuksen tuloksia voidaan hy\u00f6dynt\u00e4\u00e4 esimerkiksi tutkimuksissa, v\u00e4lineiden suunnittelussa ja kehittelyss\u00e4 sek\u00e4 harjoittelussa, kuten esimerkiksi tasapainoharjoituksissa.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Alpine skiing is one of the most popular winter sports in the world. Alpine skiing can also be categorized as an extreme sport and is known to be a sport with a high risk of injury (Maes et al. 2002). The ski boot acts as an interface between the skier and skis and transfers the forces from the skier to the skis. This force transfer is strongly influenced by the ski boot\u2019s mechanical properties, which affect the skiing and the skiing safety (Hasler et al. 2019). Even if the equipment has a big role in skiing, relatively little published research is available on ski equipment. The main purpose of this study was therefore to examine the acute response of the rotational moments on the knees when wearing ski boots during a simulated balance perturbation. In addition, the acute response of the knee adduction moments and knee flexion angles were studied.\nSeventeen healthy (11 men, 6 women), national level alpine skiers (age 16.8 \u00b1 2.1 yr, height 173.1 \u00b1 10,6 cm, weight 68.4 \u00b1 14.1 kg) were recruited in cooperation with the help of Kuopio Region Sports Academy from the local alpine ski gymnasium and the local ski club. The measurements were conducted on an instrumented treadmill and with help of a reflective marker-based 3D motion capture system. The protocol included 10 perturbations with a given direction (anterior-posterior, medial-lateral, lateral-medial) and speed (slow or fast) at random intervals barefoot and with ski boots on.\nThe absolute maximal rotation moment, adduction moment and flexion angle and the absolute maximal change from the start position to 150 ms were calculated from the mean values of the 10 perturbations. The means and standard deviations were calculated from the maximal values and change values. The means of the maximal values and change values of barefoot and ski boot conditions were compared.\nThe main findings of this study were that statistically significant differences in knee rotation moments between the barefoot and ski boot conditions were found only in the maximal change in posterior perturbation. The differences in maximal knee adduction moments were statistically significant in every perturbation direction. No statistically significant differences in knee adduction moments were found in the maximal change values. Statistically significant differences in maximal knee flexion angles were found in all perturbation directions and in the maximal changes in the knee flexion angles in posterior perturbation direction.\nThe results can be applied to several different research aspects, equipment design and development, and training methods, such as balance training.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2023-04-21T06:43:28Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2023-04-21T06:43:28Z (GMT). No. of bitstreams: 0\n Previous issue date: 2023", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "82", "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": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "alpine skiing", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ski boot", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "perturbation", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "The effect of the ski boot on knee rotation moments in horizontal balance perturbations", "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-202304212601", "language": "", "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": "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": "Biomekaniikka", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Biomechanics", "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.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.subject.oppiainekoodi", "value": "5012", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "polvet", "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": "tasapaino", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "knees", "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": "balance", "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"}]
|