https://www.selleckchem.com/products/bms-986365.html s and contralateral ACL injuries after ACL reconstruction in professional athletes in heavyweight combat sports. The incidences of ipsilateral reinjury and contralateral ACL injury after ACL reconstruction in professional sumo wrestlers were relatively higher than those reported in previous studies. © The Author(s) 2020.Background In American football, fewer fatalities and severe injuries have been seen annually since 1976, after data from 1971 through 1975 were retrospectively reviewed to better understand the mechanisms involved in catastrophic cervical spine injury and rules were enacted to prohibit certain types of aggressive tackling. The National Football Head and Neck Injury Registry was established in 1975. Purpose To assess (1) tackling techniques that coaches were teaching at 3 levels-youth level (YL; 4th to 5th grades), middle school (MS; 6th to 8th grades), and high school (HS; 9th to 12th grades); (2) tackling techniques used during games; and (3) the successful tackle rates of these techniques. Study Design Descriptive epidemiology study. Methods Surveys were distributed via email to 500 coaches of YL, MS, and HS football teams in Texas. Coaches provided video recordings of football games, and all tackle attempts were graded by a single reviewer who watched game videos; 1000 consecutive tackles were observed fohoulder. Lower reliability ratings for the youth group were likely due to lower video quality and the lack of players' tackling experience. © The Author(s) 2020.Background As previous epidemiological studies in elite ice hockey have focused on acute time-loss injuries, little is known about the burden of overuse injuries and illnesses in ice hockey. Purpose To report the prevalence and burden of all health problems in male professional ice hockey players in Norway during a single competitive season. Study Design Descriptive epidemiological study. Methods A total of 225 male ice hockey players i