No association between measures of perceived exertion and session duration with hamstring injury occurrence in professional football

Lorenzo Lolli, Roald Bahr, Matthew Weston, Rodney Whiteley, Montassar Tabben, Daniele Bonanno, Warren Gregson, Karim Chamari, Valter Di Salvo, Nicol van Dyk

Research output: Contribution to journalArticle

Abstract

Training and competition loads have emerged as modifiable composite risk factors of non-contact injury. Hamstring strains are the most common injuries in football with substantial burden on the individual player and club. Nevertheless, robust evidence of a consistent load-hamstring injury relationship in professional football is lacking. Using available data from the Qatar Stars League over three competitive seasons, this study investigated the separate and combined effects of perceived exertionintensity and session duration on hamstring injury occurrence in a sample of 30 outfield football players. Load variables were calculated into 7-day, 14-day, 21-day, 28-day periods of data, and week-to-week changes for average ratings of perceived exertion (RPE; au) score and session-RPE (s-RPE; session-duration × score), plus the cumulative training and match minutes and s-RPE, respectively. Conditional logistic regression models estimated load-injury relationships per 2-within-subject standard deviation increments in each candidate variable. Associations were declared practically important based on the location of the confidence interval in relation to thresholds of 0.90 and 1.11 defining small beneficial and harmful effects, respectively. The uncertainty for the corrected odds ratios show that typically high within-subject increments in each candidate variable were not practically important for training- and match-related hamstring injury (95% confidence intervals range: 0.85 to 1.16). We found limited exploratory evidence regarding the prognostic value of measures of perceived exertionintensity and session duration as aetiological factors of hamstring injury in Middle-East professional football. Monitoring remains valuable to inform player load management strategies, but our exploratory findings suggest its role for type-specific injury risk determination appears empirically unsupported.
Original languageEnglish
JournalScandinavian Journal of Medicine and Science in Sports
Early online date30 Oct 2019
Publication statusE-pub ahead of print - 30 Oct 2019

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Football
Wounds and Injuries
Logistic Models
Qatar
Confidence Intervals
Middle East
Uncertainty
Odds Ratio

Cite this

Lolli, Lorenzo ; Bahr, Roald ; Weston, Matthew ; Whiteley, Rodney ; Tabben, Montassar ; Bonanno, Daniele ; Gregson, Warren ; Chamari, Karim ; Di Salvo, Valter ; van Dyk, Nicol. / No association between measures of perceived exertion and session duration with hamstring injury occurrence in professional football. In: Scandinavian Journal of Medicine and Science in Sports. 2019.
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abstract = "Training and competition loads have emerged as modifiable composite risk factors of non-contact injury. Hamstring strains are the most common injuries in football with substantial burden on the individual player and club. Nevertheless, robust evidence of a consistent load-hamstring injury relationship in professional football is lacking. Using available data from the Qatar Stars League over three competitive seasons, this study investigated the separate and combined effects of perceived exertionintensity and session duration on hamstring injury occurrence in a sample of 30 outfield football players. Load variables were calculated into 7-day, 14-day, 21-day, 28-day periods of data, and week-to-week changes for average ratings of perceived exertion (RPE; au) score and session-RPE (s-RPE; session-duration × score), plus the cumulative training and match minutes and s-RPE, respectively. Conditional logistic regression models estimated load-injury relationships per 2-within-subject standard deviation increments in each candidate variable. Associations were declared practically important based on the location of the confidence interval in relation to thresholds of 0.90 and 1.11 defining small beneficial and harmful effects, respectively. The uncertainty for the corrected odds ratios show that typically high within-subject increments in each candidate variable were not practically important for training- and match-related hamstring injury (95{\%} confidence intervals range: 0.85 to 1.16). We found limited exploratory evidence regarding the prognostic value of measures of perceived exertionintensity and session duration as aetiological factors of hamstring injury in Middle-East professional football. Monitoring remains valuable to inform player load management strategies, but our exploratory findings suggest its role for type-specific injury risk determination appears empirically unsupported.",
author = "Lorenzo Lolli and Roald Bahr and Matthew Weston and Rodney Whiteley and Montassar Tabben and Daniele Bonanno and Warren Gregson and Karim Chamari and {Di Salvo}, Valter and {van Dyk}, Nicol",
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No association between measures of perceived exertion and session duration with hamstring injury occurrence in professional football. / Lolli, Lorenzo; Bahr, Roald; Weston, Matthew; Whiteley, Rodney; Tabben, Montassar; Bonanno, Daniele; Gregson, Warren; Chamari, Karim; Di Salvo, Valter; van Dyk, Nicol.

In: Scandinavian Journal of Medicine and Science in Sports, 30.10.2019.

Research output: Contribution to journalArticle

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T1 - No association between measures of perceived exertion and session duration with hamstring injury occurrence in professional football

AU - Lolli, Lorenzo

AU - Bahr, Roald

AU - Weston, Matthew

AU - Whiteley, Rodney

AU - Tabben, Montassar

AU - Bonanno, Daniele

AU - Gregson, Warren

AU - Chamari, Karim

AU - Di Salvo, Valter

AU - van Dyk, Nicol

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N2 - Training and competition loads have emerged as modifiable composite risk factors of non-contact injury. Hamstring strains are the most common injuries in football with substantial burden on the individual player and club. Nevertheless, robust evidence of a consistent load-hamstring injury relationship in professional football is lacking. Using available data from the Qatar Stars League over three competitive seasons, this study investigated the separate and combined effects of perceived exertionintensity and session duration on hamstring injury occurrence in a sample of 30 outfield football players. Load variables were calculated into 7-day, 14-day, 21-day, 28-day periods of data, and week-to-week changes for average ratings of perceived exertion (RPE; au) score and session-RPE (s-RPE; session-duration × score), plus the cumulative training and match minutes and s-RPE, respectively. Conditional logistic regression models estimated load-injury relationships per 2-within-subject standard deviation increments in each candidate variable. Associations were declared practically important based on the location of the confidence interval in relation to thresholds of 0.90 and 1.11 defining small beneficial and harmful effects, respectively. The uncertainty for the corrected odds ratios show that typically high within-subject increments in each candidate variable were not practically important for training- and match-related hamstring injury (95% confidence intervals range: 0.85 to 1.16). We found limited exploratory evidence regarding the prognostic value of measures of perceived exertionintensity and session duration as aetiological factors of hamstring injury in Middle-East professional football. Monitoring remains valuable to inform player load management strategies, but our exploratory findings suggest its role for type-specific injury risk determination appears empirically unsupported.

AB - Training and competition loads have emerged as modifiable composite risk factors of non-contact injury. Hamstring strains are the most common injuries in football with substantial burden on the individual player and club. Nevertheless, robust evidence of a consistent load-hamstring injury relationship in professional football is lacking. Using available data from the Qatar Stars League over three competitive seasons, this study investigated the separate and combined effects of perceived exertionintensity and session duration on hamstring injury occurrence in a sample of 30 outfield football players. Load variables were calculated into 7-day, 14-day, 21-day, 28-day periods of data, and week-to-week changes for average ratings of perceived exertion (RPE; au) score and session-RPE (s-RPE; session-duration × score), plus the cumulative training and match minutes and s-RPE, respectively. Conditional logistic regression models estimated load-injury relationships per 2-within-subject standard deviation increments in each candidate variable. Associations were declared practically important based on the location of the confidence interval in relation to thresholds of 0.90 and 1.11 defining small beneficial and harmful effects, respectively. The uncertainty for the corrected odds ratios show that typically high within-subject increments in each candidate variable were not practically important for training- and match-related hamstring injury (95% confidence intervals range: 0.85 to 1.16). We found limited exploratory evidence regarding the prognostic value of measures of perceived exertionintensity and session duration as aetiological factors of hamstring injury in Middle-East professional football. Monitoring remains valuable to inform player load management strategies, but our exploratory findings suggest its role for type-specific injury risk determination appears empirically unsupported.

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JO - Scandinavian Journal of Medicine and Science in Sports

JF - Scandinavian Journal of Medicine and Science in Sports

SN - 0905-7188

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