Prevalence of adolescent injury from recreational exercise: an Australian perspective. Sport participation, sport injury, risk factors and sport safety practices in Calgary and area junior high schools. The longitudinal course, risk factors, and impact of sleep disturbances in children with traumatic brain injury. Perceived risk, risk taking, estimation of ability and injury among adolescent sport participants.
PURPOSE To report the prevalence of recent  adolescent recreational and sporting  activities and associated injury . METHODS Data were collected during three school terms in 1997 using a vali date d question naire administered once only to 3538 girls and boys aged 11 - 12 years and 15 - 16 years . These students comprised 97.5 % of the students in these age ranges in r and omly selected state and private schools in the Adelaide metropolitan area ( South Australia ) . Participants identified up to three recreational and /or sporting activities in which they had participated in the previous week . Data were collected on the nature and extent of participation , and on associated injuries . Participation and injury reports were summarized descriptively in gender strata in the two adolescent age groups and stratum specific odds ratios were used to explore injury risk . RESULTS Subjects reported participating in 8997 sporting and /or recreational activities in the preceding week ( an average of 2.5 participations per student ) . Over 140 sports and recreational pursuits were represented , incorporating organized and nonorganized activities undertaken in teams , social groups , or alone . Approximately 25 % of adolescents reported at least one recreational injury . Injuries were mostly minor , reflecting soft tissue trauma and skin abrasions . Organized group sport incurred the highest risk of injury . There were marked gender and year level differences in injury risk in a number of common activities . CONCLUSIONS These findings support the need for ongoing education regarding injury prevention and management OBJECTIVES To examine rates of  sport participation , sport injury , risk factors and  sport safety practice s in young adolescents . DESIGN Cross-sectional . SETTING Calgary and area junior high schools . PARTICIPANTS A r and om sample of 1466 students ( aged 12 to 15 years ) . OUTCOME MEASURES Sport injury within one year prior to completing the survey . RESULTS Ninety-three per cent of students participated in sports in the previous year . The injury rate was 60.85 injuries/100 students/year ( 95 % CI 58.29 to 63.35 ) for students reporting at least one sport injury , 29.4 injuries/100 students/year ( 95 % CI 27.08 to 31.81 ) for medically treated injuries , and 12.28 injuries/100 students/year ( 95 % CI 10.64 to 14.07 ) for injuries presenting to a hospital emergency department . The greatest proportion of injuries occurred in basketball ( 14 % ) , soccer ( 12 % ) , hockey ( 8.6 % ) and snowboarding/skiing ( 7.1 % ) . CONCLUSIONS The rates of participation and injury in sports are high in junior high school students . Future research should focus on prevention strategies in sports with high participation and injury rates to have the greatest population health impact This study aim ed to examine the prevalence and trajectory of sleep disturbances and their associated risk factors in children up to 24 months following a traumatic brain injury ( TBI ) . In addition , the longitudinal association between sleep disturbances and children 's functional outcomes was assessed . This was a prospect i ve study of a cohort of children with TBI and a comparison cohort of children with orthopedic injury ( OI ) . Parental reports of pre-injury sleep disturbances were compared to reports of post-injury changes at 3 , 12 , and 24 months . Risk factors for sleep disturbances were examined , including severity of TBI , presence of psychosocial problems , and pain . Sleep disturbances were also examined as a predictor of children 's functional outcomes in the areas of adaptive behavior skills and activity participation . Both cohorts ( children with TBI and OI ) displayed increased sleep disturbances after injury . However , children with TBI experienced higher severity and more prolonged duration of sleep disturbances compared to children with OI . Risk factors for disturbed sleep included mild TBI , psychosocial problems , and frequent pain . Sleep disturbances emerged as significant predictors of poorer functional outcomes in children with moderate or severe TBI . Children with TBI experienced persistent sleep disturbances over 24 months . Findings suggest a potential negative impact of disturbed sleep on children 's functional outcomes , highlighting the need for further research on sleep in children with TBI OBJECTIVE To determine the predictive validity of perceived risk , risk taking , estimation of ability , overefficacy , and previous injuries on actual injury among adolescents in sport ; and to examine sex differences on these factors . METHODS A cohort of 260 ( 148 male , 112 female ) soccer players aged 11 to 14 years participated in a 3-month prospect i ve injury study . Preseason written measures included self-reported perceived risk , previous injuries , risk taking and estimation of ability . RESULTS Low levels of perceived risk and estimation of ability were associated with a significant increase in risk of injury , with odds ratios ( ORs ) ranging from 3.77 - 7.92 . Positive relationships between injury and both estimation of ability and overestimation of ability were supported . Estimation of ability was also positively related to risk taking . In this study , however , risk taking was not directly related to injury , nor were previous injuries . Girls reported higher levels of perceived risk and lower levels of risk taking than boys . However , boys and girls reported similar estimation of ability and overestimation of ability and subsequently incurred similar numbers of injuries . CONCLUSIONS Perceived risk and estimation of ability represent significant psychological risk factors for injury in adolescent sports . Sex differences in perceived risk , risk taking , and previous injuries should be considered when developing environmental and behavioral injury-prevention programs
Conclusions : Chronic lack of sleep in adolescents is associated with greater risk of sports and musculoskeletal injuries .
Current evidence can not yet definitively determine the effect of acute lack of sleep on injury rates .
Background : Although sleep has been identified as an important modifiable risk factor for injury , the effect of decreased sleep on sports injuries in adolescents is poorly studied .
The objective of this study was to quantitatively and qualitatively review published literature to examine if a lack of sleep is associated with sports injuries in adolescents and to delineate the effects of chronic versus acute lack of sleep .