Epidemiological survey of anterior cruciate ligament injury in Japanese junior high school and high school athletes: cross-sectional study

Takahashi, Saeko; Okuwaki, Toru

doi:10.1080/15438627.2017.1314290

Cited by 39 publications

(30 citation statements)

References 13 publications

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“…The model was passively simulated in the three independent rotations to study the strains on individual connective tissues. Mechanism of sports injuries [ 8 , 21 , 22 , 36 ] and injuries in elderly [ 5 , 15 , 28 ] are lucidly credible with the help of the proposed model.…”

Section: Discussionmentioning

confidence: 99%

An extended OpenSim knee model for analysis of strains of connective tissues

et al. 2018

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BackgroundOpenSim musculoskeletal models provide an accurate simulation environment that eases limitations of in vivo and in vitro studies. In this work, a biomechanical knee model was formulated with femoral articular cartilages and menisci along with 25 connective tissue bundles representing ligaments and capsules. The strain patterns of the connective tissues in the presence of femoral articular cartilage and menisci in the OpenSim knee model was probed in a first of its kind study.MethodsThe effect of knee flexion (0°–120°), knee rotation (− 40° to 30°) and knee adduction (− 15° to 15°) on the anterior cruciate, posterior cruciate, medial collateral, lateral collateral ligaments and other connective tissues were studied by passive simulation. Further, a new parameter for assessment of strain namely, the differential inter-bundle strain of the connective tissues were analyzed to provide new insights for injury kinematics.ResultsACL, PCL, LCL and PL was observed to follow a parabolic strain pattern during flexion while MCL represented linear strain patterns. All connective tissues showed non-symmetric parabolic strain variation during rotation. During adduction, the strain variation was linear for the knee bundles except for FL, PFL and TL.ConclusionsStrains higher than 0.1 were observed in most of the bundles during lateral rotation followed by abduction, medial rotation and adduction. In the case of flexion, highest strains were observed in aACL and aPCL. A combination of strains at a flexion of 0° with medial rotation of 30° or a flexion of 80° with rotation of 30° are evaluated as rupture-prone kinematics.Electronic supplementary materialThe online version of this article (10.1186/s12938-018-0474-8) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

An extended OpenSim knee model for analysis of strains of connective tissues

et al. 2018

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“…Previous research also revealed that high school students have a high rate of ACL injuries compared to junior high school age groups. [13] Therefore, it is necessary to investigate mechanisms of ACL injury among high school students within each sport to gain a better understanding of ACL injury patterns and injury prevention.…”

Section: Introductionmentioning

confidence: 99%

A retrospective study of mechanisms of anterior cruciate ligament injuries in high school basketball, handball, judo, soccer, and volleyball

Takahashi

Nagano²,

Ito

et al. 2019

Medicine

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The purpose of this study was to analyze the mechanism of anterior cruciate ligament (ACL) injuries among male and female high school students across several different sports to understand ACL injury trends. A total of 1000 cases involving high school students who suffered ACL injuries during school activities (soccer, basketball, volleyball, handball, and judo) and who received insurance benefits through the Injury and Accident Mutual Aid Benefit System, were included to clarify the various mechanisms of ACL injuries. The mechanism of ACL injury was divided into contact and non-contact injuries. Contact injuries were further divided into direct and indirect contact injuries. Non-contact ACL injuries were also further divided into landing injuries, which involved jump-landing movements, and cutting and stopping injuries, which involved movement with a change of direction and deceleration. Overall, 99.0% of judo ACL injuries were categorized as contact ACL injuries. With regards to ball sports, the number of non-contact ACL injuries among basketball, volleyball, and handball players was significantly higher than the number of contact injuries (67.0%, 86.5%, and 68.5% respectively). With regards to female soccer and basketball players, the number of indirect ACL injuries was higher than direct injuries (72.2% and 76.7%, respectively). Volleyball was associated with a higher rate of non-contact injuries. Soccer, basketball, and handball were associated with more or similar rates of indirect and non-contact injuries than direct injuries. Judo was associated with a higher rate of contact injuries.

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“…In soccer, the injury rate for ACL varies from 0.07 to 0.5 injuries per 1000 player-hours [40][41][42]. According to Takahashi et al, the incidence of ACL injuries in judo is 0.81 per 1000 athlete-years [43]. These results demonstrate that ACL injuries in judo are common (even more than in soccer) and that medical teams should be fully prepared in order to give athletes the best care to return to competition as safely as possible.…”

Section: Discussionmentioning

confidence: 99%

Side Differences Regarding the Limb Symmetry Index in Healthy Professional Athletes

et al. 2020

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Side differences in the limb symmetry index during hop tests have been rarely investigated in uninjured athletes. Unknown differences can result in false interpretation of hop tests and affect return to sport decision. Hypothesis was that un-injured athletes in Judo and Taekwondo have side differences in hop test and that asymmetries can be predicted based on the athletes fighting display. Differences, risk relationships were analyzed using the chi-squared test and the odds ratio. A two-tailed p value of<0.05 was considered statistically significant. 115 athletes from the national teams were included (mean age 18.4 years; range 13–27 years). 93, 97.4 and 98.3% did not have symmetric hop distance for three hop tests. Up to a quarter did not reach a limb symmetry index of>90. Moreover, 57.4% (n=66) reached longer jumping distance with the standing leg. Ignoring such pre-existent side differences in evaluation of hop tests and not knowing which limb was dominant prior the injury, can lead to premature or delayed return to sports in the rehabilitation process. Therefore, it might be helpful to refer to individual jump lengths for each limb in case of injury by using hop tests in pre-season screening in professional athletes in Judo and Taekwondo.

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Epidemiological survey of anterior cruciate ligament injury in Japanese junior high school and high school athletes: cross-sectional study

Cited by 39 publications

References 13 publications

An extended OpenSim knee model for analysis of strains of connective tissues

An extended OpenSim knee model for analysis of strains of connective tissues

A retrospective study of mechanisms of anterior cruciate ligament injuries in high school basketball, handball, judo, soccer, and volleyball

Side Differences Regarding the Limb Symmetry Index in Healthy Professional Athletes

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