Systematic development of an injury prevention programme for judo athletes: the IPPON intervention

Gerhardt, Amber L von; Vriend, Ingrid; Verhagen, Evert; Tol, Johannes L.; Kerkhoffs, Gino M. M. J.; Reurink, Gustaaf

doi:10.1136/bmjsem-2020-000791

Cited by 17 publications

(19 citation statements)

References 37 publications

(47 reference statements)

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“…Recently it was reported that the isokinetically measured DCR (dynamic control ratio) ratio with the eccentric Hamstrings strength could also help in the early identification of vulnerable judokas and help in optimal conditioning of judokas ( Šimenko, Karpljuk & Hadžić, 2022 ). Also, raising awareness with the regular implementation of already available exercise prevention programs developed especially for judo ( Akoto et al, 2018 ; Malliaropoulos et al, 2019 ; von Gerhardt et al, 2020 ) would be helpful.…”

Section: Discussionmentioning

confidence: 99%

Diagnostics of tissue involved injury occurrence of top-level judokas during the competition: suggestion for prevention

Błach

Smolders²,

Šimenko

et al. 2022

PeerJ

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Background Judo, as a high-intensity contact sport, may lead to the occurrence of injuries, especially in competitions. This work aims to assess the likelihood of soft and hard tissue injuries in top-level judokas during competition with defining factors that determine the probability of injury occurrence. Methods The injuries that occurred in 123 official international competitions from 2005–2019 were recorded by the European Judo Union (EJU) Medical Commission as a survey that was a part of the EJU Injury Registration form with internal consistency shown by a Crombach Alpha of 0.69. This survey data identified factors such as: sex, anatomical localisation of injury, type of injury, tissue involved and mechanisms of the injury. A total of 650 tissue injuries were reported correctly in terms of tissue injury definition. Results The most frequent soft tissue injury (STI) reported was a ligament STI (48.15%), closely followed by skin STI (12.15%) and muscles STI (11.38%). In turn, the most frequent hard tissue injury occurred in bones (8.56%). The highest rates of injuries occurred during the fight in the standing position (78%). Injuries in the standing position mainly occurred while executing a throw (25.85%) and followed by the attempt to throw, i.e., the action of reaching the throwing position (22.30%), grip fighting (15.07%), and during falls (14.77%). Opposite to this, fight in groundwork reached only 18.30% soft and hard tissue injuries combined. The ongoing registration of injuries during judo combat and training and the early diagnosis of risk factors for injuries are the basis for the development of effective strategies for injury prevention and further treatment.

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Section: Discussionmentioning

confidence: 99%

Diagnostics of tissue involved injury occurrence of top-level judokas during the competition: suggestion for prevention

Błach

Smolders²,

Šimenko

et al. 2022

PeerJ

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“…The ACL is also the most serious knee injury in judo [ 48 ]. Therefore, suggestions have been made for the importance of developing an exercise prevention programme for judo [ 48 , 49 , 50 ]. Combined with the injury preventive programmes, the DCR ratio with the eccentric H strength could also help in the early identification of vulnerable judokas and optimal conditioning of judo athletes.…”

Section: Discussionmentioning

confidence: 99%

Monitoring of Eccentric Hamstring Strength and Eccentric Derived Strength Ratios in Judokas from a Single Weight Category

Šimenko

Karpljuk

Hadžić

2022

IJERPH

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Background: This study was designed to perform isokinetic knee testing of male judokas competing in the under 73 kg category. The main aims were: to establish the concentric (CON) and eccentric (ECC) strength profile of hamstrings (H) and CON profile of quadriceps (Q) muscles; to evaluate the differences in CON and ECC peak torques (PT) with various strength ratios and their bilateral asymmetries; the calculation of the dynamic control ratio (DCR) and H ECC to CON ratio (HEC); Methods: 12 judokas competing on a national and international levels with a mean age of 19 ± 4 years, a weight of 75 ± 2 kg and with a height of 176 ± 5 cm were tested. All the subjects were right-hand dominant. Isokinetic testing was performed on iMOMENT, SMM isokinetic machine (SMM, Maribor, Slovenia). The paired t-test was used to determine the difference between paired variables. The level of significance was set at p ≤ 0.05; Results: Statistical differences between left (L) and right (R) Q PT (L 266; R 241 Nm), H ECC PT (L 145; R 169 Nm), HQR (L 0.54; R 0.63), DCR (L 0.55; R 0.70), HEC (L 1.02; R 1.14) and PTQ/BW (L 3.57; R 3.23 Nm/kg) were shown. Bilateral strength asymmetries in CON contraction of 13.52% ± 10.04 % for Q, 10.86% ± 7.67 % for H and 22.04% ± 12.13% for H ECC contraction were shown. Conclusions: This study reports the isokinetic strength values of judokas in the under 73 kg category, emphasising eccentric hamstring strength and eccentric derived strength ratios DCR and HEC. It was shown that asymmetries are better detected using eccentric testing and that the dominant leg in judokas had stronger eccentric hamstring strength resulting in higher DCR and HEC.

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“…The IPPON intervention is an injury prevention programme designed specifically to reduce injuries in judo athletes. 16 The KTS 15 was used for the systematic development of the programme. The five steps of the bottom-up development process have been described in full detail before 16 and summarised in online supplemental appendix E. The intervention was available through instructional videos, 18 and an instruction book with photos and explanation of all exercises including key points of correct performance of the exercises.…”

Section: Interventionmentioning

confidence: 99%

“…16 The KTS 15 was used for the systematic development of the programme. The five steps of the bottom-up development process have been described in full detail before 16 and summarised in online supplemental appendix E. The intervention was available through instructional videos, 18 and an instruction book with photos and explanation of all exercises including key points of correct performance of the exercises. There were also hand-held photo cards with descriptions for the trainers to use on the tatami (judo training ground).…”

Section: Interventionmentioning

confidence: 99%

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Effectiveness of a judo-specific injury prevention programme: a randomised controlled trial in recreational judo athletes

et al. 2023

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ObjectivesTo evaluate the effectiveness of a trainer-supervised judo-specific injury prevention warm-up programme on overall injury prevalence.MethodsWe conducted a two-arm, cluster randomised controlled trial; the Injury Prevention and Performance Optimization Netherlands (IPPON) study. Judo athletes aged≥12 years were randomised by judo school to IPPON intervention or control group who performed their usual warm-up. Primary outcome was overall injury prevalence (%) over the follow-up period (16–26 weeks) measured fortnightly with the Oslo Sports and Trauma Research Centre Questionnaire. A modified intention-to-treat analysis was performed due to COVID-19, with estimates for the primary outcome obtained using generalised linear mixed models. Secondary outcomes included: prevalence of severe injuries, overall incidence, time-loss injuries, exposure, adherence and experiences of trainers and athletes.Results269 judo athletes (IPPON: 117, Control: 152) were included. Mean injury prevalence over 16–26 weeks was 23% (95% CI 20% to 26%) in the IPPON and 28% (95% CI 25% to 30%) in the control group. We observed no significant difference of all reported injuries (OR 0.72 in favour of the IPPON group; 95% CI 0.37 to 1.39). Secondary outcomes also demonstrated no significant differences between groups. Specifically, no significant difference of severe injuries was reported (OR 0.80 in favour of the IPPON group; 95% CI 0.36 to 1.78). All trainers and 70% of athletes perceived the IPPON intervention as successful.ConclusionThe IPPON intervention did not significantly reduce the overall and severe injury prevalence. Despite this, we suggest the IPPON intervention be considered as an useful alternative to regular judo warm-up, given the high adherence and the positive clinical experiences of trainers and athletes.Trial registration numberNTR7698.

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Systematic development of an injury prevention programme for judo athletes: the IPPON intervention

Cited by 17 publications

References 37 publications

Diagnostics of tissue involved injury occurrence of top-level judokas during the competition: suggestion for prevention

Diagnostics of tissue involved injury occurrence of top-level judokas during the competition: suggestion for prevention

Monitoring of Eccentric Hamstring Strength and Eccentric Derived Strength Ratios in Judokas from a Single Weight Category

Effectiveness of a judo-specific injury prevention programme: a randomised controlled trial in recreational judo athletes

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