Abstract
Background
Hamstring strain injuries (HSI) are prevalent in team sports and occur frequently in the later phase of matches. In the search for interindividual factors that determine muscle fatigue and possibly injury risk, muscle fibre typology is a likely candidate.
Objective
The aim of the study was to determine whether muscle fibre typology is a risk factor for HSI.
Methods
A prospective cohort study was conducted over three seasons in professional football players competing in the Belgian Jupiler Pro League (n = 118) and in the English Premier League (n = 47). A total of 27 HSI were sustained during this period. Muscle fibre typology was non-invasively estimated using proton magnetic resonance spectroscopy and was characterized as a fast, slow, or intermediate typology based on the carnosine concentration in the soleus. A multivariate Cox model was used to identify risk factors for HSI.
Results
Football players exhibited a wide variety of muscle typologies (slow 44.9%, intermediate 39.8%, fast 15.3%). In the combined cohort, players with a fast typology displayed a 5.3-fold (95% confidence interval [CI] 1.92–14.8; P = 0.001) higher risk of sustaining an index HSI than slow typology players. This was also independently observed in both leagues separately as, respectively, a 6.7-fold (95% CI 1.3–34.1; P = 0.023) and a 5.1-fold (95% CI 1.2–20.4; P = 0.023) higher chance was found in fast typology players than in slow typology players of the Jupiler Pro League and the Premier League cohort.
Conclusion
We identified muscle fibre typology as a novel and potent risk factor for HSI in team sports.
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EL received a grant from Research Foundation-Flanders (FWO 1104020 N) during the conduct of the study. The funder of the study had no role in study design, data collection, data analysis, data interpretation, or writing of the report.
Conflict of interest
EL received a grant from Research Foundation-Flanders (FWO 1104020 N) during the conduct of the study. KVV, FVdC, EW, DD, BDW, SM, WDG, JBM, JGB, EW, and WD have no conflicts of interest that are directly relevant to the content of this article.
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This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the local ethical committee (Ghent University Hospital, Ghent, Belgium; B670201837890).
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The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
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EL, WD, and EW participated in the design of the study and drafted the manuscript. KVV, FVdC, and EW contributed to the statistical analysis. DD, SM, BDW, SM, WDG, JBM, and JGB participated in data collection. All authors contributed to data interpretation and reviewed the final version.
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Lievens, E., Van Vossel, K., Van de Casteele, F. et al. Muscle Fibre Typology as a Novel Risk Factor for Hamstring Strain Injuries in Professional Football (Soccer): A Prospective Cohort Study. Sports Med 52, 177–185 (2022). https://doi.org/10.1007/s40279-021-01538-2
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DOI: https://doi.org/10.1007/s40279-021-01538-2