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Injury risk-workload associations in NCAA American college football

Journal Article


Abstract


  • Objectives: To determine injury risk-workload associations in collegiate American Football.

    Design: Retrospective analysis.

    Methods: Workload and injury data was recorded from 52 players during a full NCAA football season. Acute, chronic, and a range of acute:chronic workload ratios (ACWR: 7:14, 7:21 and 7:28 day) calculated using rolling and exponentially weighted moving averages (EWMA) were plotted against non-contact injuries (regardless of time lost or not) sustained within 3- and 7-days. Injury risks were also determined relative to position and experience.

    Results: 105 non-contact injuries (18 game- and 87 training-related) were observed with almost 40% sustained during the pre-season. 7–21 day EWMA ACWR's with a 3-day injury lag were most closely associated with injury (R 2 = 0.54). Relative injury risks were > 3× greater with high compared to moderate and low ratios and magnified when combined with low 21-day chronic workloads (injury probability = 92.1%). Injury risks were similar across positions. ‘Juniors’ presented likely and possibly increased overall injury risk compared to ‘Freshman’ (RR: 1.94, CI 1.07–3.52) and ‘Seniors’ (RR: 1.7, CI 0.92–3.14), yet no specific ACWR – experience or – position interactions were identified.

    Conclusions: High injury rates during college football pre-season training may be associated with high acute loads. In-season injury risks were greatest with high ACWR and evident even when including (more common and less serious) non-time loss injuries. Substantially increased injury risks when low 21-day chronic workloads and concurrently high EWMA ACWR highlights the importance of load management for individuals with chronic game- (non-involved on game day) and or training (following injury) absences.

UOW Authors


  •   Sampson, John
  •   Murray, A (external author)
  •   Williams, Sean (external author)
  •   Halseth, Travis (external author)
  •   Hanisch, J (external author)
  •   Golden, G (external author)
  •   Fullagar, Hugh (external author)

Publication Date


  • 2018

Citation


  • Sampson, J. A., Murray, A., Williams, S., Halseth, T., Hanisch, J., Golden, G. & Fullagar, H. H. K. (2018). Injury risk-workload associations in NCAA American college football. Journal of Science and Medicine in Sport, 21 (12), 1215-1220.

Scopus Eid


  • 2-s2.0-85047380942

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers1/442

Number Of Pages


  • 5

Start Page


  • 1215

End Page


  • 1220

Volume


  • 21

Issue


  • 12

Place Of Publication


  • Australia

Abstract


  • Objectives: To determine injury risk-workload associations in collegiate American Football.

    Design: Retrospective analysis.

    Methods: Workload and injury data was recorded from 52 players during a full NCAA football season. Acute, chronic, and a range of acute:chronic workload ratios (ACWR: 7:14, 7:21 and 7:28 day) calculated using rolling and exponentially weighted moving averages (EWMA) were plotted against non-contact injuries (regardless of time lost or not) sustained within 3- and 7-days. Injury risks were also determined relative to position and experience.

    Results: 105 non-contact injuries (18 game- and 87 training-related) were observed with almost 40% sustained during the pre-season. 7–21 day EWMA ACWR's with a 3-day injury lag were most closely associated with injury (R 2 = 0.54). Relative injury risks were > 3× greater with high compared to moderate and low ratios and magnified when combined with low 21-day chronic workloads (injury probability = 92.1%). Injury risks were similar across positions. ‘Juniors’ presented likely and possibly increased overall injury risk compared to ‘Freshman’ (RR: 1.94, CI 1.07–3.52) and ‘Seniors’ (RR: 1.7, CI 0.92–3.14), yet no specific ACWR – experience or – position interactions were identified.

    Conclusions: High injury rates during college football pre-season training may be associated with high acute loads. In-season injury risks were greatest with high ACWR and evident even when including (more common and less serious) non-time loss injuries. Substantially increased injury risks when low 21-day chronic workloads and concurrently high EWMA ACWR highlights the importance of load management for individuals with chronic game- (non-involved on game day) and or training (following injury) absences.

UOW Authors


  •   Sampson, John
  •   Murray, A (external author)
  •   Williams, Sean (external author)
  •   Halseth, Travis (external author)
  •   Hanisch, J (external author)
  •   Golden, G (external author)
  •   Fullagar, Hugh (external author)

Publication Date


  • 2018

Citation


  • Sampson, J. A., Murray, A., Williams, S., Halseth, T., Hanisch, J., Golden, G. & Fullagar, H. H. K. (2018). Injury risk-workload associations in NCAA American college football. Journal of Science and Medicine in Sport, 21 (12), 1215-1220.

Scopus Eid


  • 2-s2.0-85047380942

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers1/442

Number Of Pages


  • 5

Start Page


  • 1215

End Page


  • 1220

Volume


  • 21

Issue


  • 12

Place Of Publication


  • Australia