High-rate settlement and unconsciousness with shime-waza in young judo athletes from a video analytic study in Judo World Championships
Objectives: We aimed to investigate the incidence rate of unconsciousness related to shime-waza and the accompanying symptoms by age categories using video analysis of the Judo World Championships.
Design: Observational retrospective study.
Methods: We included 6918 elite judo athletes and 7426 bouts from the Judo World Championships between 2015 and 2021. Incidence rates of matches settled using shime-waza and unconsciousness were calculated by age categories: cadet, junior, and senior. Furthermore, in cases of unconsciousness resulting from shime-waza, the duration of choking initiation and release, unconsciousness, and awareness were recorded from video analysis and compared by the presence of post-awareness symptoms. A relationship between the duration of shime-waza and the post-awareness symptoms was investigated using receiver operating characteristic analysis.
Results: Shime-waza was used to settle 307 (4.1%) bouts comprising 6.0%, 4.4%, and 3.0% of the cadet, junior, and senior bouts, respectively (p<0.001). The unconsciousness rates were 18.9%, 14.6%, and 4.3% in the cadet, junior (p=0.008), and senior bouts (p<0.001), respectively. Among the 39 unconsciousness cases, 24 (61.5%) showed convulsions or staggers after awareness. The duration from unconsciousness to choking release in cases with and without symptoms was 5.0±3.5s and 2.4±2.0s, respectively (p=0.009); moreover, this duration was significantly correlated with the duration from unconsciousness to awareness (p=0.480, p=0.002). The cut-off point for symptom occurrence was a duration from unconsciousness to choking release of =4s (area under the curve=0.746, p=0.003, odds ratio=6.7).
Conclusions: Considering the risk of unconsciousness and accompanying symptoms resulting from shime-waza, appropriate education and responses are required.
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Aiheet: | judo juniori huippu-urheilu maailmanmestaruuskilpailut kilpailu analyysi tekniikka |
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Aihealueet: | biologiset ja lääketieteelliset tieteet kamppailu-urheilu junioriurheilu |
DOI: | 10.1016/j.jsams.2022.09.001 |
Julkaisussa: | Journal of Science and Medicine in Sport |
Julkaistu: |
2022
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Vuosikerta: | 25 |
Numero: | 11 |
Sivuja: | 942-947 |
Julkaisutyypit: | artikkeli |
Kieli: | englanti (kieli) |
Taso: | kehittynyt |