Background:Return to play(RTP)in elite rugby is managed using a 6-stage graduated RTP protocol,which can result in clearance to play within 1 week of injury.We aimed to explore how symptom,cognitive,and balance presen...Background:Return to play(RTP)in elite rugby is managed using a 6-stage graduated RTP protocol,which can result in clearance to play within 1 week of injury.We aimed to explore how symptom,cognitive,and balance presentation and evolution during concussion screens 2 h(head injury assessment(HIA2)and 48 h(HIA3)after injury were associated with time to RTP)to identify whether a more conservative graduated RTP may be appropriate.Methods:A retrospective cohort study was conducted in 380 concussed rugby players from elite men’s rugby over 3 consecutive seasons.Players were classified as shorter or longer returns,depending on whether RTP occurred within 7 days(allowing them to be considered to play the match 1 week after injury)or longer than 8 days,respectively.Symptom,cognitive,and balance performance during screens was assessed relative to baseline(normal or abnormal)and to the preceding screen(improving or worsening).Associations between sub-test abnormalities and RTP time were explored using odds ratios(OR,longer vs.shorter).Median day absence was compared between players with abnormal or worsening results and those whose results were normal or improving.Results:Abnormal symptom results during screens 2 h and 48 h after concussion were associated with longer return time(HIA2:OR=2.21,95%confidence interval(95%CI):1.39-3.50;HIA3:OR=3.30,95%CI:1.89-5.75).Worsening symptom number or severity from the time of injury to 2 h and 48 h post-injury was associated with longer return(HIA2:OR=2.49,95%CI:1.36-4.58;HIA3:OR=3.34,95%CI:1.10-10.15).Median days absence was greater in players with abnormal symptom results at both HIA2 and HIA3.Cognitive and balance performance were not associated with longer return and did not affect median days absence.Conclusion:Symptom presentation and evolution within 48 h of concussion were associated with longer RTP times.This may guide a more conservative approach to RTP,while still adhering to individualized concussion management principles.展开更多
目的:分析中国国家女子曲棍球队队员不同位置的跑动特征,为运动员科学选材与训练提供理论支撑。方法:运用九轴加速度传感器+GPS系统采集曲棍球运动员赛中的运动距离、运动量、运动强度、运动速度以及变速运动等指标。结果:(1)后卫的总...目的:分析中国国家女子曲棍球队队员不同位置的跑动特征,为运动员科学选材与训练提供理论支撑。方法:运用九轴加速度传感器+GPS系统采集曲棍球运动员赛中的运动距离、运动量、运动强度、运动速度以及变速运动等指标。结果:(1)后卫的总跑动距离和训练量显著高于前锋(P<0.001);前卫的训练量、训练强度显著高于前锋(P<0.05 or P<0.01)。(2)在0~4 m/s中低速区间,后卫跑动距离及次数显著高于前锋(P<0.05、P<0.01 or P<0.001);在4~6 m/s中高速区间,运动员在跑动距离、占比及次数方面前卫最高而前锋最低,前卫在4~5m/s区间跑动距离的占比显著高于其他位置(P<0.05 or P<0.01);在6+m/s高速区间,前锋的跑动距离、占比及次数显著高于后卫(P<0.05 or P<0.01)。(3)后卫高速向左、中加速和低加速的次数显著高于前锋(P<0.001 or P<0.01);前卫中速向左、低速向左、中加速、中减速以及低速向右的次数显著高于前锋(P<0.01 or P<0.05)。结论:中国国家女子曲棍球队前锋、前卫和后卫分别具有较强的高速、中速和中低速奔跑能力,分别体现了较多的高速直线加速、中低变速、中高变速运动的特征,前、后卫左向旋转变速运动表现尤为突出。展开更多
文摘Background:Return to play(RTP)in elite rugby is managed using a 6-stage graduated RTP protocol,which can result in clearance to play within 1 week of injury.We aimed to explore how symptom,cognitive,and balance presentation and evolution during concussion screens 2 h(head injury assessment(HIA2)and 48 h(HIA3)after injury were associated with time to RTP)to identify whether a more conservative graduated RTP may be appropriate.Methods:A retrospective cohort study was conducted in 380 concussed rugby players from elite men’s rugby over 3 consecutive seasons.Players were classified as shorter or longer returns,depending on whether RTP occurred within 7 days(allowing them to be considered to play the match 1 week after injury)or longer than 8 days,respectively.Symptom,cognitive,and balance performance during screens was assessed relative to baseline(normal or abnormal)and to the preceding screen(improving or worsening).Associations between sub-test abnormalities and RTP time were explored using odds ratios(OR,longer vs.shorter).Median day absence was compared between players with abnormal or worsening results and those whose results were normal or improving.Results:Abnormal symptom results during screens 2 h and 48 h after concussion were associated with longer return time(HIA2:OR=2.21,95%confidence interval(95%CI):1.39-3.50;HIA3:OR=3.30,95%CI:1.89-5.75).Worsening symptom number or severity from the time of injury to 2 h and 48 h post-injury was associated with longer return(HIA2:OR=2.49,95%CI:1.36-4.58;HIA3:OR=3.34,95%CI:1.10-10.15).Median days absence was greater in players with abnormal symptom results at both HIA2 and HIA3.Cognitive and balance performance were not associated with longer return and did not affect median days absence.Conclusion:Symptom presentation and evolution within 48 h of concussion were associated with longer RTP times.This may guide a more conservative approach to RTP,while still adhering to individualized concussion management principles.
文摘目的:分析中国国家女子曲棍球队队员不同位置的跑动特征,为运动员科学选材与训练提供理论支撑。方法:运用九轴加速度传感器+GPS系统采集曲棍球运动员赛中的运动距离、运动量、运动强度、运动速度以及变速运动等指标。结果:(1)后卫的总跑动距离和训练量显著高于前锋(P<0.001);前卫的训练量、训练强度显著高于前锋(P<0.05 or P<0.01)。(2)在0~4 m/s中低速区间,后卫跑动距离及次数显著高于前锋(P<0.05、P<0.01 or P<0.001);在4~6 m/s中高速区间,运动员在跑动距离、占比及次数方面前卫最高而前锋最低,前卫在4~5m/s区间跑动距离的占比显著高于其他位置(P<0.05 or P<0.01);在6+m/s高速区间,前锋的跑动距离、占比及次数显著高于后卫(P<0.05 or P<0.01)。(3)后卫高速向左、中加速和低加速的次数显著高于前锋(P<0.001 or P<0.01);前卫中速向左、低速向左、中加速、中减速以及低速向右的次数显著高于前锋(P<0.01 or P<0.05)。结论:中国国家女子曲棍球队前锋、前卫和后卫分别具有较强的高速、中速和中低速奔跑能力,分别体现了较多的高速直线加速、中低变速、中高变速运动的特征,前、后卫左向旋转变速运动表现尤为突出。
