Methods: For the study, 107 adolescents from two secondary schools in Reykjavik, Iceland, were randomly selected to participate and tested on physical fitness, motor competence, cognitive skills and intelligence. Also, 34 adolescents from the Icelandic youth national team programs in football, team handball and athletics participated, totaling a final number of 141 study participants.
Aðferðir: Líkamshreysti, hreyfifærni, hugræn færni og greind 141 unglings var mæld, þar af voru 107 nemendur tveggja grunnskóla í Reykjavík sem valdir voru með slembiúrtaki og 34 afreksíþróttaunglingar sem tilheyrðu ungligalandsliðshópum í knattspyrnu, handknattleik og frjálsíþróttum þegar rannsóknin var gerð.