| fullrecord |
[{"key": "dc.contributor.advisor", "value": "Avela, Janne", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Rantalainen, Timo", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Joentausta, Pontus", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2022-12-08T07:44:17Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2022-12-08T07:44:17Z", "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/123456789/84220", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Johdanto: J\u00e4\u00e4kiekko on nopeatempoinen joukkuelaji, jossa taklaaminen on sallittua. Vartalotaklaukset ovat t\u00e4rke\u00e4 osa peli\u00e4 miesten ammattilaistasolla. Kuitenkin taklaukset aiheuttavat paljon loukkaantumisia, kuten aivot\u00e4r\u00e4hdyksi\u00e4. T\u00f6rm\u00e4ykset kaukalon laitaan saa aikaan my\u00f6s usein loukkaantumisia. Joustavampia kaukalon malleja on tutkittu viime vuosina ja v\u00e4hitellen monet kaukalot on vaihdettu joustavampiin. On tieteellist\u00e4 n\u00e4ytt\u00f6\u00e4, ett\u00e4 joustavammat kaukalot v\u00e4hent\u00e4v\u00e4t olkap\u00e4\u00e4- ja p\u00e4\u00e4vammojen m\u00e4\u00e4r\u00e4\u00e4. T\u00e4m\u00e4 tutkimus keskittyy laitaan kohdistuviin taklauksiin tarkoituksena selvitt\u00e4\u00e4 taklausnopeuksia, laidan k\u00e4ytt\u00e4ytymist\u00e4 ja p\u00e4\u00e4n kiihtyvyyksi\u00e4 kyseisten taklausten aikana. \nMenetelm\u00e4t: J\u00e4\u00e4kiekon kilpailutoiminnassa mukana olevia ryhmi\u00e4 rekrytoitiin mukaan tutkimukseen kuudesta eri ik\u00e4ryhm\u00e4st\u00e4. Nuorimmat olivat U14 joukkueessa pelaavia ja vanhimmat Suomen p\u00e4\u00e4sarjatasolla, Liigassa, ammatikseen pelaavia aikuisia. Kaikki ryhm\u00e4t tekiv\u00e4t useita suorituksia taklausharjoitetta ja taklaukset videoitiin suurnopeuskameroilla kuvanopeuden ollessa 250 kuvaa sekunnissa. Taklausharjoitteiden lis\u00e4ksi seitsem\u00e4n j\u00e4\u00e4kiekko-ottelua kuvattiin samalla tavalla. Pelaajien taklausnopeudet, p\u00e4\u00e4n kiihtyvyydet sek\u00e4 laidan ja pleksin k\u00e4ytt\u00e4ytymist\u00e4 mitattiin. \nTulokset: Taklaajan kohtisuora nopeus laitaa kohti oli pienin U14 ryhm\u00e4ss\u00e4 (keskiarvo = 2,79 m/s) ja korkein U18 ryhm\u00e4ss\u00e4 (keskiarvo = 3,50 m/s), mutta otteluiden keskiarvo oli kaikista korkein (3,73 m/s). Pelaajien resultanttinopeuden keskiarvot olivat 4\u20136 m/s kaikissa ryhmiss\u00e4 taklaajien ja taklattavien osalta. P\u00e4\u00e4n huippukiihtyvyyksien keskiarvot olivat 60\u201375 m/s2 taklaajilla ja 72\u201391 m/s2 taklattavilla. U18 ryhm\u00e4ll\u00e4 oli suurimmat keskiarvot p\u00e4\u00e4n huippukiihtyvyyksiss\u00e4, mutta U15 ryhm\u00e4ll\u00e4 oli korkein yksitt\u00e4inen arvo (170 m/s2). Laidan siirtymiss\u00e4 keskiarvot olivat 0,81\u20132,45 cm elementin osalta ja 1,78\u20134,72 cm pleksin osalta. Molemmissa pienimm\u00e4t arvot olivat U14 ryhm\u00e4lt\u00e4 ja suurimmat arvot Liiga ryhm\u00e4lt\u00e4. \nPohdinta ja yhteenveto: Suurimmat erot ik\u00e4ryhmien v\u00e4lisiss\u00e4 tuloksissa ovat laidan siirtymiss\u00e4 oletetusti. Nopeuseroavaisuuksissa hypoteesi osui my\u00f6s oikeaan, mutta p\u00e4\u00e4n kiihtyvyyksien osalta erot olivat pienempi\u00e4 kuin oli odotettua. T\u00e4rke\u00e4 huomio on, ett\u00e4 nuorimmilla p\u00e4\u00e4n kiihtyvyyksiss\u00e4 oli paljon hajontaa, mik\u00e4 johtunee kokemattomuudesta taklauksissa tai laidan joustamattomuudesta tai molemmista. Joustavammat laidat voisivat pienent\u00e4\u00e4 p\u00e4\u00e4n kiihtyvyyksi\u00e4, mutta on kyseenalaista, ett\u00e4 onko merkitt\u00e4v\u00e4mpi tekij\u00e4 pelaajien kokemattomuus ja vai suhteellisen joustamaton laitarakenne. Taklausharjoite vastasi hyvin pelitilanteessa olleita taklauksia sill\u00e4 poikkeuksella, ett\u00e4 otteluissa taklaajien kohtisuora nopeus oli hieman korkeampi.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Intoduction: Ice hockey is a fast-paced game where body checking (tackling) is allowed. Body checks are an important part of the game in men\u2019s elite level. However, body checks are reason for many injuries such as concussions. Contact with ice hockey rink board causes often injuries as well. There has been research and change towards more flexible board systems to prevent injuries during last years. There is evidence that more flexible boards decrease head and shoulder injuries. This study focuses on body checking towards boards and the study aims to find out checking velocities, board behaviour and head accelerations during a body check at boards. \nMethods: Competitive ice hockey players from 6 different age groups were recruited to perform body checking drill. U14 was the youngest group, and the oldest group was professional adult players from the highest level in Finland, Liiga. All groups performed body checking drill at least 18 times and body checks were filmed with high-speed-cameras with framerate of 250 Hz. Besides that, 7 ice hockey matches were filmed with the same setup. Player velocities, peak head accelerations, and board and glass behaviour were measured. \nResults: Defender\u2019s (player who checks) perpendicular velocity was the smallest in U14 group (avg = 2,79 m/s) and the highest in U18 group (avg = 3,50 m/s) but the matches showed the highest average of 3,73 m/s. Player speed average was between 4 \u2013 6 m/s in all groups among puck holders (player who receives the check) and defenders. In peak head accelerations all averages were between 60 and 75 m/s2 among defenders and averages were between 72 and 91 m/s2 among puck holders. U18 had the highest averages but U15 had the highest single value of 170 m/s2. Board stopping distance averages were from 0,81 cm to 2,45 cm in the element part where U14 had the smallest average and Liiga group had the highest average. From the glass part it was the same with values of 1,78 cm to 4,72 cm. \nDiscussion & Conclusions: The biggest differences between age groups in results are in board behaviour as it was expected. Velocity differences were also as hypothesised but head acceleration differences were smaller than expected. Important aspect from head accelerations is that younger players had much more variation in head accelerations which is due to inexperience in body checking, or board behaviour, or both. More flexible board could lower head accelerations, but it is debatable if the main difference is because of board flexibility or inexperience among players. The body checking drill corresponded well to match situations with exception that drill executions were done with little bit slower perpendicular velocities.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2022-12-08T07:44:17Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2022-12-08T07:44:17Z (GMT). No. of bitstreams: 0\n Previous issue date: 2022", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "56", "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": "player safety", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "body check", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "tackle", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "head acceleration", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ice hockey board", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "pelaajaturvallisuus", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "taklaus", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "p\u00e4\u00e4n kiihtyvyys", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "kaukalo", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Body checking into the boards in ice hockey : velocities, head accelerations and board behaviour", "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-202212085482", "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": "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.collaborator", "value": "business", "language": "", "element": "contractresearch", "qualifier": "collaborator", "schema": "yvv"}, {"key": "yvv.contractresearch.funding", "value": "4000 \u20ac", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "yvv.contractresearch.initiative", "value": "business", "language": "", "element": "contractresearch", "qualifier": "initiative", "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": "5012", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "turvallisuus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "j\u00e4\u00e4kiekko", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "safety and security", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ice hockey", "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"}]
|