Marc Dauty1, Pierre Menu2, Alban Fouasson-Chailloux2, Sophie Ferréol2, Charles Dubois2. 1. Department of Pôle MPR, Hôpital Saint Jacques, CHU NANTES, France; INSERM, UMRS 791-LIOAD, Centre for osteo-articular and dental tissue engineering, groupe STEP, Nantes, France. 2. Department of Pôle MPR, Hôpital Saint Jacques, CHU NANTES, France.
Abstract
OBJECTIVES: previous studies investigating the ability of isokinetic strength ratios to predict hamstring injuries in soccer players have reported conflicting results. HYPOTHESIS: to determine if isokinetic ratios are able to predict hamstring injury occurring during the season in professional soccer players. STUDY DESIGN: case-control study; LEVEL OF EVIDENCE: 3. METHODS: from 2001 to 2011, 350 isokinetic tests were performed in 136 professional soccer players at the beginning of the soccer season. Fifty-seven players suffered hamstring injury during the season that followed the isokinetic tests. These players were compared with the 79 uninjured players. The bilateral concentric ratio (hamstring-to-hamstring), ipsilateral concentric ratio (hamstring-to-quadriceps), and mixed ratio (eccentric/concentric hamstring-to-quadriceps) were studied. The predictive ability of each ratio was established based on the likelihood ratio and post-test probability. RESULTS: the mixed ratio (30 eccentric/240 concentric hamstring-to-quadriceps) <0.8, ipsilateral ratio (180 concentric hamstring-to-quadriceps) <0.47, and bilateral ratio (60 concentric hamstring-to-hamstring) <0.85 were the most predictive of hamstring injury. The ipsilateral ratio <0.47 allowed prediction of the severity of the hamstring injury, and was also influenced by the length of time since administration of the isokinetic tests. CONCLUSION: isokinetic ratios are useful for predicting the likelihood of hamstring injury in professional soccer players during the competitive season.
OBJECTIVES: previous studies investigating the ability of isokinetic strength ratios to predict hamstring injuries in soccer players have reported conflicting results. HYPOTHESIS: to determine if isokinetic ratios are able to predict hamstring injury occurring during the season in professional soccer players. STUDY DESIGN: case-control study; LEVEL OF EVIDENCE: 3. METHODS: from 2001 to 2011, 350 isokinetic tests were performed in 136 professional soccer players at the beginning of the soccer season. Fifty-seven players suffered hamstring injury during the season that followed the isokinetic tests. These players were compared with the 79 uninjured players. The bilateral concentric ratio (hamstring-to-hamstring), ipsilateral concentric ratio (hamstring-to-quadriceps), and mixed ratio (eccentric/concentric hamstring-to-quadriceps) were studied. The predictive ability of each ratio was established based on the likelihood ratio and post-test probability. RESULTS: the mixed ratio (30 eccentric/240 concentric hamstring-to-quadriceps) <0.8, ipsilateral ratio (180 concentric hamstring-to-quadriceps) <0.47, and bilateral ratio (60 concentric hamstring-to-hamstring) <0.85 were the most predictive of hamstring injury. The ipsilateral ratio <0.47 allowed prediction of the severity of the hamstring injury, and was also influenced by the length of time since administration of the isokinetic tests. CONCLUSION: isokinetic ratios are useful for predicting the likelihood of hamstring injury in professional soccer players during the competitive season.
Authors: Matthew N Bourne; Ryan G Timmins; David A Opar; Tania Pizzari; Joshua D Ruddy; Casey Sims; Morgan D Williams; Anthony J Shield Journal: Sports Med Date: 2018-02 Impact factor: 11.136
Authors: Renan F H Nunes; Rodolfo A Dellagrana; Fábio Y Nakamura; Cosme F Buzzachera; Flavia A M Almeida; Lucinar J F Flores; Luiz G A Guglielmo; Sérgio G da Silva Journal: Int J Sports Phys Ther Date: 2018-02
Authors: Monika Grygorowicz; Martyna Michałowska; Tomasz Walczak; Adam Owen; Jakub Krzysztof Grabski; Andrzej Pyda; Tomasz Piontek; Tomasz Kotwicki Journal: PLoS One Date: 2017-12-07 Impact factor: 3.240