{"id":6425,"date":"2026-10-19T09:48:53","date_gmt":"2026-10-19T09:48:53","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-heilbrigdisvisindum-kari-arnason\/"},"modified":"2026-10-19T09:48:53","modified_gmt":"2026-10-19T09:48:53","slug":"doktorsvorn-i-heilbrigdisvisindum-kari-arnason","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-heilbrigdisvisindum-kari-arnason\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed heilbrig\u00f0isv\u00edsindum &#8211; K\u00e1ri \u00c1rnason"},"content":{"rendered":"<div class=\"field-items\">\n<div class=\"field-item even\" property=\"content:encoded\">\n<p>F\u00f6studaginn 21. n\u00f3vember 2025 ver K\u00e1ri \u00c1rnason doktorsritger\u00f0 s\u00edna \u00ed heilbrig\u00f0isv\u00edsindum vi\u00f0 L\u00e6knadeild H\u00e1sk\u00f3la \u00cdslands. Ritger\u00f0in ber heiti\u00f0: Meira en bara \u00f6xlin? Hreyfigreining \u00e1 uppst\u00f6kkskasti og \u00e1hrifa\u00fe\u00e6ttir axlarmei\u00f0sla \u00ed handbolta. More than the shoulder? Kinematics of the jump throw and factors influencing shoulder problems in handball.<\/p>\n<p>Andm\u00e6lendur eru dr. Roland Johannes Wilhelmus van den Tillaar, pr\u00f3fessor vi\u00f0 Nord University \u00ed Levanger \u00ed Noregi, og \u00a0dr. Behnam Liaghat, d\u00f3sent vi\u00f0 Syddansk Universitet \u00ed Danm\u00f6rku.<\/p>\n<p>Umsj\u00f3narkennari var Krist\u00edn Briem, pr\u00f3fessor og lei\u00f0beinandi Atli \u00c1g\u00fastsson, lektor. Auk \u00feeirra s\u00e1tu \u00ed doktorsnefnd El\u00eds \u00de\u00f3r Rafnsson, sj\u00fakra\u00fej\u00e1lfari og Hilde Fredriksen, sj\u00fakra\u00fej\u00e1lfari.<\/p>\n<p>S\u00f3lveig \u00c1sa \u00c1rnad\u00f3ttir, pr\u00f3fessor og forma\u00f0ur n\u00e1msbrautar \u00ed sj\u00fakra\u00fej\u00e1lfun, stj\u00f3rnar ath\u00f6fninni sem fer fram \u00ed H\u00e1t\u00ed\u00f0asal H\u00e1sk\u00f3la \u00cdslands og hefst kl. 9.00.<\/p>\n<p><strong>\u00c1grip <\/strong><\/p>\n<p>Axlarvandam\u00e1l eru algeng \u00e1 me\u00f0al handboltai\u00f0kenda. \u00deekktir \u00e1h\u00e6ttu\u00fe\u00e1ttir eru skortur \u00e1 styrk og hreyfigetu \u00ed \u00f6xl og skyndileg aukning \u00ed \u00e6finga- og keppnis\u00e1lagi en l\u00edti\u00f0 er vita\u00f0 um \u00e1hrif grunnstyrks og afls \u00ed ne\u00f0ri \u00fatlimum og bol \u00e1 \u00fer\u00f3un \u00e1lagsmei\u00f0sla \u00ed \u00f6xl. \u00der\u00e1tt fyrir a\u00f0 uppst\u00f6kk s\u00e9 ein algengasta kastt\u00e6knin \u00ed handbolta hafa f\u00e1ar ranns\u00f3knir greint hana me\u00f0 \u00fer\u00edv\u00edddart\u00e6kni me\u00f0 tilliti til \u00e1lags \u00e1 axlarli\u00f0inn. Hreyfingar \u00ed ne\u00f0ri \u00fatlimum og bol vi\u00f0 framkv\u00e6md \u00feeirrar kastt\u00e6kni og \u00e1hrif \u00feeirra \u00e1 kast\u00f6xlina eru \u00fev\u00ed l\u00edti\u00f0 \u00feekkt, sem og \u00e1hrif leikst\u00f6\u00f0u. Framkv\u00e6md ranns\u00f3knanna sem \u00feessi ritger\u00f0 byggir \u00e1 var \u00fer\u00edskipt. \u00cd fyrsta hluta voru tengsl styrktar- og aflm\u00e6linga \u00ed ne\u00f0ri \u00fatlimum og bol \u00e1 undirb\u00faningst\u00edmabili og axlarmei\u00f0sla yfir keppnist\u00edmabil k\u00f6nnu\u00f0 \u00e1 me\u00f0al karlkyns handboltai\u00f0kenda. \u00cd \u00f6\u00f0rum hluta voru s\u00f6mu tengsl k\u00f6nnu\u00f0 \u00e1 me\u00f0al kvenkyns handboltai\u00f0kenda, sem og \u00e1hrif innra og ytra axlar\u00e1lags. \u00cd \u00feri\u00f0ja hluta var \u00fer\u00edv\u00edddar-hreyfigreining framkv\u00e6md \u00e1 uppst\u00f6kkskasti til a\u00f0 meta hornhra\u00f0a og hreyfi\u00fatslag \u00ed gegnum hreyfike\u00f0juna. Tengsl \u00e1 milli hreyfinga \u00ed ne\u00f0ri \u00fatlimum og bol og hreyfinga \u00ed kast\u00f6xl voru metin, s\u00e9rstaklega me\u00f0 tilliti til framlags hreyfinga \u00ed ne\u00f0ri \u00fatlimum og bol til innsn\u00fanings hornhra\u00f0a \u00ed kast\u00f6xl. Saman s\u00fdna ranns\u00f3knirnar fram \u00e1 mikilv\u00e6gi kraftmyndunar \u00ed ne\u00f0ri \u00fatlimum og bol hj\u00e1 karlkyns handboltai\u00f0kendum og hvernig hreyfingar \u00ed ne\u00f0ri \u00fatlimum og bol hafa \u00e1hrif \u00e1 hornhra\u00f0a og hreyfi\u00fatslag \u00ed kast\u00f6xl. Samt\u00edmis varpa ni\u00f0urst\u00f6\u00f0urnar lj\u00f3si \u00e1 fl\u00f3ki\u00f0 samspil mismunandi \u00e1h\u00e6ttu\u00fe\u00e1tta var\u00f0andi axlarmei\u00f0sli \u00e1 me\u00f0al kvenkyns handboltai\u00f0kenda.<\/p>\n<p><strong>Abstract <\/strong><\/p>\n<p>Shoulder problems are common among handball players. However, the influence of lower body strength and trunk rotation power on shoulder problems in handball have not been investigated before. Despite the jump throw being the most common throwing technique in handball, few motion analyses stuides have been conducted. This thesis is based on results from three research papers. In the first part, the association between pre-season lower body strength and trunk rotation power and shoulder problems during the ensuing season was examined among male handball players. In the second part, the same relationships were studied among female players, with the additional analysis of the effects of internal versus external shoulder load. In the third part, a 3D motion analysis of the jump throw was performed. Together, the studies demonstrate the importance of proximal segments\u00b4 force generation among male players and how proximal kinematics influence the throwing shoulder during a jump throw. Simultaneously they highlight the complex interaction of multiple risk factors for shoulder problems among female players.<\/p>\n<p><strong>Um doktorsefni\u00f0<\/strong><\/p>\n<p>K\u00e1ri \u00c1rnason er f\u00e6ddur \u00e1ri\u00f0 1988 \u00e1 Akranesi og uppalinn \u00ed Vesturb\u00e6 Reykjav\u00edkur. Hann lauk B.Sc. pr\u00f3fi \u00ed sj\u00fakra\u00fej\u00e1lfun fr\u00e1 H\u00e1sk\u00f3la \u00cdslands \u00e1ri\u00f0 2013 og M.Sc. pr\u00f3fi fr\u00e1 University College London 2016. K\u00e1ri hefur starfa\u00f0 sem sj\u00fakra\u00fej\u00e1lfari fr\u00e1 2013 og fr\u00e1 jan\u00faar 2025 sem lektor vi\u00f0 N\u00e1msbraut \u00ed sj\u00fakra\u00fej\u00e1lfun vi\u00f0 H\u00e1sk\u00f3la \u00cdslands. \u00c1ri\u00f0 2022 h\u00f3f hann doktorsn\u00e1m undir handlei\u00f0slu dr. Krist\u00ednar Briem og dr. Atla \u00c1g\u00fastssonar. Foreldrar K\u00e1ra eru \u00c1rni \u00de\u00f3r V\u00e9steinsson og Ingibj\u00f6rg R\u00f6gnvaldsd\u00f3ttir. Eiginkona K\u00e1ra er Kara Elvarsd\u00f3ttir og saman eiga \u00feau Kr\u00edu (8 \u00e1ra) og \u00dalf (4 \u00e1ra).<\/p>\n<\/div><\/div>","protected":false},"featured_media":5812,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_phd_date_start":"2025-11-21T09:00:00+00:00","_phd_date_end":"2025-11-21T12:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0asalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Meira en bara \u00f6xlin? Hreyfigreining \u00e1 uppst\u00f6kkskasti og \u00e1hrifa\u00fe\u00e6ttir axlarmei\u00f0sla \u00ed handbolta. More than the shoulder? 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