{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T22:11:26Z","timestamp":1780697486174,"version":"3.54.1"},"reference-count":59,"publisher":"Human Kinetics","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,6,1]]},"abstract":"<jats:p>Many head acceleration events (HAEs) observed in youth football emanate from a practice environment. This study aimed to evaluate HAEs in youth football practice drills using a mouthpiece-based sensor, differentiating between inertial and direct HAEs. Head acceleration data were collected from athletes participating on 2 youth football teams (ages 11\u201313\u00a0y) using an instrumented mouthpiece-based sensor during all practice sessions in a single season. Video was recorded and analyzed to verify and assign HAEs to specific practice drill characteristics, including drill intensity, drill classification, and drill type. HAEs were quantified in terms of HAEs per athlete per minute and peak linear and rotational acceleration and rotational velocity. Mixed-effects models were used to evaluate the differences in kinematics, and generalized linear models were used to assess differences in HAE frequency between drill categories. A total of 3237 HAEs were verified and evaluated from 29 football athletes enrolled in this study. Head kinematics varied significantly between drill categorizations. HAEs collected at higher intensities resulted in significantly greater kinematics than lower-intensity drills. The results of this study add to the growing body of evidence informing evidence-based strategies to reduce head impact exposure and concussion risk in youth football practices.<\/jats:p>","DOI":"10.1123\/jab.2022-0196","type":"journal-article","created":{"date-parts":[[2023,4,27]],"date-time":"2023-04-27T13:18:30Z","timestamp":1682601510000},"page":"157-168","source":"Crossref","is-referenced-by-count":8,"title":["Characterization of Head Acceleration Exposure During Youth Football Practice Drills"],"prefix":"10.1123","volume":"39","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1491-4714","authenticated-orcid":true,"given":"Ty D.","family":"Holcomb","sequence":"first","affiliation":[{"name":"Department of Biomedical Engineering, Wake Forest University School of Medicine, Winston-Salem, NC, USA"},{"name":"Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Winston-Salem, NC, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9907-578X","authenticated-orcid":true,"given":"Madison E.","family":"Marks","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Wake Forest University School of Medicine, Winston-Salem, NC, USA"},{"name":"Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Winston-Salem, NC, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2603-0841","authenticated-orcid":true,"given":"N.","family":"Stewart Pritchard","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Wake Forest University School of Medicine, Winston-Salem, NC, USA"},{"name":"Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Winston-Salem, NC, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6348-7536","authenticated-orcid":true,"given":"Logan","family":"Miller","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Wake Forest University School of Medicine, Winston-Salem, NC, USA"},{"name":"Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Winston-Salem, NC, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3711-1949","authenticated-orcid":true,"given":"Mark A.","family":"Espeland","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA"},{"name":"Department of Gerontology and Geriatric Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3460-3980","authenticated-orcid":true,"given":"Christopher M.","family":"Miles","sequence":"additional","affiliation":[{"name":"Department of Family and Community Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4059-0538","authenticated-orcid":true,"given":"Justin B.","family":"Moore","sequence":"additional","affiliation":[{"name":"Department of Implementation Science, Wake Forest University School of Medicine, Winston-Salem, NC, USA"},{"name":"Department of Epidemiology & Prevention, Wake Forest University School of Medicine, Winston-Salem, NC, USA"},{"name":"Division of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, NC, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3759-4581","authenticated-orcid":true,"given":"Kristie L.","family":"Foley","sequence":"additional","affiliation":[{"name":"Department of Implementation Science, Wake Forest University School of Medicine, Winston-Salem, NC, USA"},{"name":"Division of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, NC, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9762-3033","authenticated-orcid":true,"given":"Joel D.","family":"Stitzel","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Wake Forest University School of Medicine, Winston-Salem, NC, USA"},{"name":"Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Winston-Salem, NC, 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