The contribution of in-game fatigue and use of
Description: The contribution of in-game fatigue and use of replacements to injury risk in professional rugby union Replacements: what do people think? What do we know from the literature? Injury incidence is lower in the first 20 min of a match
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slide1. The contribution of in-game fatigue and use of replacements to injury risk in professional rugby union<br>
slide2. Replacements: what do people think?<br>
slide3. What do we know from the literature? Injury incidence is lower in the first 20 min of a match
Williams et al. 2013 Injury incidence is greater in starters (114 /1000 hours) vs. replacements (87 /1000 hours)
Brooks et al. 2004 Player time-in-game does not affect tackler or ball carrier technique
Tierney et al. 2018 Replacements have a short-term impact in terms of player running performance
Lacome et al. 2016 Changing from unlimited to 12 interchanges in sub-elite Rugby League reduced injury incidence by 30%
Gabbett et al. 2005<br>
slide4. Study 1
Do more injuries occur late in matches and are starters or replacements more likely to get injured? Project research questions Injury incidence, severity and patterns by match quarter and in starters vs. replacements
Time to injury from start of game (in starters) and entry onto field (in replacements)
Is there an association between the number of replacements made in a game and the incidence or severity of injuries?<br>
slide5. Study 1 - Methods Player match exposures:
Shirt number: Starter or Replacement
Exposure minutes per player
Playing position Player injuries
Greater than 24 hours time-loss
Severity (days absence)
Diagnosis
Injury Event
Match quarter
Playing position (2011 – 2019)
>2000 Team games Australia
New Zealand
South Africa
(2016 – 2018) Welsh regions<br>
slide6. Study 1 – Initial findings: English Premiership Front row Back row Scrum half Second row Inside backs Outside backs<br>
slide7. Study 1 – Initial findings: English Premiership<br>
slide8. Four seasons (2015/16 – 2018/19) ~900 tackle injuries ~3600 control tackles Study 2 Tackles coded by video analysis Do tackles between starters and replacements have a greater propensity for injury than those of the same status (i.e., both starters or both replacements)?<br>
slide9. Summary What we can show from this observational study
Current status of injury risk to starters and replacements during match play under current laws.
What we should be cautious with at this stage
Whether player behaviour would change if the number of replacements were reduced and what impact this may have on injuries.<br>
slide10. Thank you for your attention<br>
slide2. Replacements: what do people think?<br>
slide3. What do we know from the literature? Injury incidence is lower in the first 20 min of a match
Williams et al. 2013 Injury incidence is greater in starters (114 /1000 hours) vs. replacements (87 /1000 hours)
Brooks et al. 2004 Player time-in-game does not affect tackler or ball carrier technique
Tierney et al. 2018 Replacements have a short-term impact in terms of player running performance
Lacome et al. 2016 Changing from unlimited to 12 interchanges in sub-elite Rugby League reduced injury incidence by 30%
Gabbett et al. 2005<br>
slide4. Study 1
Do more injuries occur late in matches and are starters or replacements more likely to get injured? Project research questions Injury incidence, severity and patterns by match quarter and in starters vs. replacements
Time to injury from start of game (in starters) and entry onto field (in replacements)
Is there an association between the number of replacements made in a game and the incidence or severity of injuries?<br>
slide5. Study 1 - Methods Player match exposures:
Shirt number: Starter or Replacement
Exposure minutes per player
Playing position Player injuries
Greater than 24 hours time-loss
Severity (days absence)
Diagnosis
Injury Event
Match quarter
Playing position (2011 – 2019)
>2000 Team games Australia
New Zealand
South Africa
(2016 – 2018) Welsh regions<br>
slide6. Study 1 – Initial findings: English Premiership Front row Back row Scrum half Second row Inside backs Outside backs<br>
slide7. Study 1 – Initial findings: English Premiership<br>
slide8. Four seasons (2015/16 – 2018/19) ~900 tackle injuries ~3600 control tackles Study 2 Tackles coded by video analysis Do tackles between starters and replacements have a greater propensity for injury than those of the same status (i.e., both starters or both replacements)?<br>
slide9. Summary What we can show from this observational study
Current status of injury risk to starters and replacements during match play under current laws.
What we should be cautious with at this stage
Whether player behaviour would change if the number of replacements were reduced and what impact this may have on injuries.<br>
slide10. Thank you for your attention<br>