Protection Against Spikes in Workload With Aerobic Fitness and Playing Experience: The Role of the Acute:Chronic Workload Ratio on Injury Risk in Elite Gaelic Football

Shane Malone, Mark Roe, Dominic A. Doran, Tim J. Gabbett, Kieran D. Collins
2017 International Journal of Sports Physiology and Performance  
Word Count: 250 Text-Only Word count: 3000 ABSTRACT Purpose: To examine the association between combined session-RPE workload measures and injury risk in elite Gaelic footballers. Methods: Thirty-seven elite Gaelic footballers (mean ± SD age of 24.2 ± 2.9 yr) from one elite squad were involved in a single season study. Weekly workload (session-RPE multiplied by duration) and all time-loss injuries (including subsequent week injuries) were recorded during the period. Rolling weekly sums and
more » ... o-week changes in workload were measured, allowing for the calculation of the 'acute:chronic workload ratio' that was calculated by dividing acute workload (i.e. 1-week workload) by chronic workload (i.e. rolling average 4-weekly workload). Workload measures were then modelled against all injury data sustained using a logistic regression model. Odds ratios (OR) were reported against a reference group. Results: High 1-weekly workloads (≥2770 AU, OR = 1.63 -6.75) were associated with significantly higher risk of injury compared to a low training load reference group (<1250 AU). When exposed to spikes in workload (acute:chronic workload ratio >1.5), players with 1 year experience had a higher risk of injury (OR = 2.22) and players with 2-3 (OR = 0.20) and 4-6 years (OR = 0.24) of experience had a lower risk of injury. Players with poorer aerobic fitness (estimated from a 1 km time trial) had a higher injury risk compared to players with higher aerobic fitness (OR = 1.50-2.50). An acute:chronic workload ratio of (≥2.0) demonstrated the greatest risk of injury. Conclusions: These findings highlight an increased risk of injury for elite Gaelic football players with high (>2.0) acute:chronic workload ratios and high weekly workloads. A high aerobic capacity and playing experience appears to offer injury protection against rapid changes in workload and high acute:chronic workload ratios. Moderate workloads, coupled with moderate-high changes in the acute:chronic workload ratio appear to be protective for Gaelic football players. "Aerobic Fitness and Playing Experience Protect Against Spikes in Workload: The Role of the Acute:Chronic Workload Ratio on Injury Risk in Elite Gaelic Football" by Malone S et al. Orchard JW. Spikes in acute workload are associated with increased injury risk in elite cricket fast bowlers. Br J Sports Med. 2013:bjsports-2013-092524. 13. Hulin BT, Gabbett, TJ, Caputi P, Lawson, DW, Sampson, JA . Low chronic workload and the acute:chronic workload ratio are more predictive of injury than betweenmatch recovery time: A two-season prospective cohort study in elite rugby league players. Br J Sports Med, 2016 (in press). "Aerobic Fitness and Playing Experience Protect Against Spikes in Workload: The Role of the Acute:Chronic Workload Ratio on Injury Risk in Elite Gaelic Football" by Malone S et al. . 23. Berthon P, Fellmann N, Bedu M. et al. A 5-min running field test as a measurement of maximal aerobic velocity.
doi:10.1123/ijspp.2016-0090 pmid:27400233 fatcat:nnrhanykgjetnebxceunubshzq