Purpose This study aimed to describe athlete workload over the course of a four-year collegiate lacrosse career.Methods Workload was evaluated each day of training and games using global positioning system microtechno...Purpose This study aimed to describe athlete workload over the course of a four-year collegiate lacrosse career.Methods Workload was evaluated each day of training and games using global positioning system microtechnology.Total workload for each athlete was calculated for each season of each year for total distance,high-intensity distance,accelerations,decelerations,and sprints.Data were tabulated as absolute and relative workloads with absolute workload representing an individual athlete and relative workload representing that athlete’s percentage of team mean workload.Results The workload of the entire lacrosse team was collected over four years containing the full career of six athletes.Across the five workload variables analyzed,athletes either maintained a workload near team mean workload or demonstrated an increase in workload towards the end of their careers.Conclusion As careers progressed,the variation in athlete workload decreased,and athletes approached the team’s average workload.Microtechnology may be useful in monitoring athlete workload over the course of a career.展开更多
Background:Lacrosse is one of the fastest-growing sports in the United States.Its rules regarding permitted contact differ by sex and age.There are no known studies using a nationally representative data set to analyz...Background:Lacrosse is one of the fastest-growing sports in the United States.Its rules regarding permitted contact differ by sex and age.There are no known studies using a nationally representative data set to analyze lacrosse injury patterns over several years by sex and age in the youth population.Methods:A retrospective analysis was performed using data from the National Electronic Injury Surveillance System for youth aged 11-18 years who were treated for lacrosse-related injuries in U.S.emergency departments from 2000 to 2016.Based on our review of the case narratives,we created and coded a new injury-mechanism variable.We generated national estimates from 6406 cases.Results:An estimated 206,274 lacrosse-related injuries to youths aged 11-18 years were treated in U.S.emergency departments from 2000 to 2016.The rate of injuries per 10,000 significantly increased from 1.9 in 2000 to a peak of 5.3 in 2012(p<0.0001),followed by a significant decrease to 3.4 in 2016(p=0.020).Injury mechanism,body part injured,and diagnosis differed by sex.Boys were 1.62 times(95%confidence interval(95%CI):1.25-2.09)more likely than girls to be injured by player-to-player contact.Girls were 2.21 times(95%CI:1.96-2.49)more likely than boys to have non-contact injuries.Overall,as age increased,the percentage of injuries from lacrosse sticks decreased and player-toplayer contact increased.Conclusion:Despite additional protective regulations in the sport,lacrosse is an important source of injury where we continue to see differences by sex and age.This study supports the continuation,modification,and addition of rules aimed at reducing lacrosse injury risk.展开更多
Purpose To investigate knee joint function during an unanticipated cutting task between healthy and ACL-reconstructed(ACL-R)females within the same NCAA Division I collegiate female lacrosse team(WLAX)via knee mechani...Purpose To investigate knee joint function during an unanticipated cutting task between healthy and ACL-reconstructed(ACL-R)females within the same NCAA Division I collegiate female lacrosse team(WLAX)via knee mechanics and esti-mated vasti and hamstring muscle forces.Methods Knee mechanics during three unanticipated cutting trials were observed using 3D motion analysis techniques for 26 healthy female lacrosse players,five which had previous history of ACL-R.Knee flexion angle and knee extensor moment were calculated via Visual3D.Modified musculoskeletal models were used to estimated vasti and hamstrings muscle forces obtained from static optimization.The 2×2(group×limb)repeated measures ANOVAs were used to identify differences in knee mechanics,and vasti and hamstring muscle groups among healthy/ACL-R between their preferred and involved limbs.Results There was an interaction between group and limb for knee extensor moment.ACL-R females had less knee extensor moments in their involved limb compared to their uninvolved limb(P<0.001).There was also a group main effect found for knee flexion angle.ACL-R females cut with less knee flexion angle compared to healthy females(P<0.013).No significant differences were found for estimated vasti or hamstring forces.Conclusions These pilot results indicate that despite all female WLAX players undergoing the same strength and condition-ing programming,training sessions,with the same coaching staff,differences in knee joint mechanics still exist between healthy and ACL-R players.These data should help inform larger-scaled studies investigating the impact of ACL-R on athletes within the same sports team.展开更多
文摘Purpose This study aimed to describe athlete workload over the course of a four-year collegiate lacrosse career.Methods Workload was evaluated each day of training and games using global positioning system microtechnology.Total workload for each athlete was calculated for each season of each year for total distance,high-intensity distance,accelerations,decelerations,and sprints.Data were tabulated as absolute and relative workloads with absolute workload representing an individual athlete and relative workload representing that athlete’s percentage of team mean workload.Results The workload of the entire lacrosse team was collected over four years containing the full career of six athletes.Across the five workload variables analyzed,athletes either maintained a workload near team mean workload or demonstrated an increase in workload towards the end of their careers.Conclusion As careers progressed,the variation in athlete workload decreased,and athletes approached the team’s average workload.Microtechnology may be useful in monitoring athlete workload over the course of a career.
文摘Background:Lacrosse is one of the fastest-growing sports in the United States.Its rules regarding permitted contact differ by sex and age.There are no known studies using a nationally representative data set to analyze lacrosse injury patterns over several years by sex and age in the youth population.Methods:A retrospective analysis was performed using data from the National Electronic Injury Surveillance System for youth aged 11-18 years who were treated for lacrosse-related injuries in U.S.emergency departments from 2000 to 2016.Based on our review of the case narratives,we created and coded a new injury-mechanism variable.We generated national estimates from 6406 cases.Results:An estimated 206,274 lacrosse-related injuries to youths aged 11-18 years were treated in U.S.emergency departments from 2000 to 2016.The rate of injuries per 10,000 significantly increased from 1.9 in 2000 to a peak of 5.3 in 2012(p<0.0001),followed by a significant decrease to 3.4 in 2016(p=0.020).Injury mechanism,body part injured,and diagnosis differed by sex.Boys were 1.62 times(95%confidence interval(95%CI):1.25-2.09)more likely than girls to be injured by player-to-player contact.Girls were 2.21 times(95%CI:1.96-2.49)more likely than boys to have non-contact injuries.Overall,as age increased,the percentage of injuries from lacrosse sticks decreased and player-toplayer contact increased.Conclusion:Despite additional protective regulations in the sport,lacrosse is an important source of injury where we continue to see differences by sex and age.This study supports the continuation,modification,and addition of rules aimed at reducing lacrosse injury risk.
文摘Purpose To investigate knee joint function during an unanticipated cutting task between healthy and ACL-reconstructed(ACL-R)females within the same NCAA Division I collegiate female lacrosse team(WLAX)via knee mechanics and esti-mated vasti and hamstring muscle forces.Methods Knee mechanics during three unanticipated cutting trials were observed using 3D motion analysis techniques for 26 healthy female lacrosse players,five which had previous history of ACL-R.Knee flexion angle and knee extensor moment were calculated via Visual3D.Modified musculoskeletal models were used to estimated vasti and hamstrings muscle forces obtained from static optimization.The 2×2(group×limb)repeated measures ANOVAs were used to identify differences in knee mechanics,and vasti and hamstring muscle groups among healthy/ACL-R between their preferred and involved limbs.Results There was an interaction between group and limb for knee extensor moment.ACL-R females had less knee extensor moments in their involved limb compared to their uninvolved limb(P<0.001).There was also a group main effect found for knee flexion angle.ACL-R females cut with less knee flexion angle compared to healthy females(P<0.013).No significant differences were found for estimated vasti or hamstring forces.Conclusions These pilot results indicate that despite all female WLAX players undergoing the same strength and condition-ing programming,training sessions,with the same coaching staff,differences in knee joint mechanics still exist between healthy and ACL-R players.These data should help inform larger-scaled studies investigating the impact of ACL-R on athletes within the same sports team.
