{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T12:05:40Z","timestamp":1782907540799,"version":"3.54.5"},"reference-count":50,"publisher":"Georg Thieme Verlag KG","issue":"02","license":[{"start":{"date-parts":[[2021,3,10]],"date-time":"2021-03-10T00:00:00Z","timestamp":1615334400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sports Med Int Open"],"published-print":{"date-parts":[[2021,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>To assess head impact incidents (HIIs) and to distinguish diagnosed head injuries from other incidents, a video observation analysis of match HIIs was conducted in the German Bundesliga (2017\/18 season). Video recordings of each match were screened to identify the respective events. Head injury data were identified by a prospective injury registry. HII and head injury incidence rates (IR) were calculated with 95% CIs. The total number of HIIs was 1,362 corresponding to an IR of 134.9\/1000 match hours (95% CI 127.9\u2013142.2). In 123 HII (IR 12.2, 95% CI 10.2\u201314.5) the contact was classified as severe. Head contact with the opponent was the most frequent cause (85%). The most frequent mechanism was in 44% (combined) the arm and elbow-to-head, followed by head-to-head and hand-to-head contacts (each 13%). In 58%, the HIIs occurred during header duels. Twenty-nine head injuries were recorded (IR 2.9, 95% CI 2.0\u20134.1). Concussions\/traumatic brain injuries accounted for 48%, head\/facial fractures 24%, head\/facial contusions 21%, and lacerations\/abrasions 7%. The number of HIIs not classified as concussions\/more severe trauma was high. Identification of HIIs and head injury severity should be improved during on-field assessment as many head injuries might go unrecognised based on the large number of HIIs.<\/jats:p>","DOI":"10.1055\/a-1338-1402","type":"journal-article","created":{"date-parts":[[2021,3,10]],"date-time":"2021-03-10T23:53:53Z","timestamp":1615420433000},"page":"E37-E44","source":"Crossref","is-referenced-by-count":21,"title":["Head Impact Situations in Professional Football (Soccer)"],"prefix":"10.1055","volume":"5","author":[{"given":"Florian","family":"Beaudouin","sequence":"additional","affiliation":[{"name":"Institute of Sports and Preventive Medicine, Saarland University, Saarbr\u00fccken, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel","family":"Demmerle","sequence":"additional","affiliation":[{"name":"Institute of Sports and Preventive Medicine, Saarland University, Saarbr\u00fccken, 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