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9) Residual/Long Term Effects
9.2 Head impact biomechanics alter neurocognitive measures after 1 contact sport season
  1. Tom Bowman1,
  2. Breedlove Katherine2,3,
  3. Lininger Monica4,
  4. Esquivel Amanda5
  1. 1Department of Athletic Training, University of Lynchburg, Lynchburg, USA
  2. 2Center for Clinical Spectroscopy, Department of Radiology, Brigham and Women’s Hospital, Boston, USA
  3. 3Department of Radiology, Harvard Medical School, Boston, USA
  4. 4Department of Physical Therapy and Athletic Training, Northern Arizona University, Flagstaff, USA
  5. 5Department of Mechanical Engineering, University of Michigan-Dearborn, Dearborn, USA

Abstract

Objective Determine the relationship between neurocognitive measures and head impact biomechanics over the course of 1 contact sport season.

Design Observational study.

Setting American collegiate soccer and lacrosse teams.

Participants Men’s soccer (N=23), women’s soccer (N=36), men’s lacrosse (N=28) and women’s lacrosse (N=31) players.

Interventions Independent variables were time (pre, post) and sex (men, women). Participants completed the Sport Concussion Assessment Tool (SCAT) and Immediate Post-Concussion and Cognitive Testing (ImPACT) before and after the season.

Outcome Measures The xPatch (X2 Biosystems, Seattle, WA, USA) stored peak linear (PLA) and rotational (PRA) accelerations of all head impacts over 10 g verified by film. Daily density of head impacts were calculated by summing accelerations for all head impacts sustained in a single day divided by the sum of the time from the previous impact.

Main Results The only significant relationship for men was between PRA and change in concentration (rs=0.32, CI95: 0.05,0.56, p=0.02). For the women, significant relationships were observed between change in reaction time with PLA (rs=-0.30, CI95: -0.50,-0.56, p=0.03), PLA daily density (rs=-0.31, CI95: -0.51,-0.57, p=0.04), and PRA daily density (rs=-0.31, CI95: -0.51,-0.57, p=0.03). There were also significant relationships between ImPACT symptom change with PLA (rs=-0.38, CI95: -0.57,-0.62, p=0.008) and PRA (rs=-0.37, CI95: -0.56,-0.61, p=0.009).

Conclusions Women appear to be adversely affected by head impact biomechanics more than men. Future studies should investigate specific reasons for the sex differences identified in neurocognitive change over a season of collegiate soccer or lacrosse.

This abstract has been published in full manuscript format and has the following citation: BMJ Citation https://www.sciencerepository.org/the-effect-of-soccer-and_NNB-2022-2-101

https://doi.org/10.1136/bjsports-2023-concussion.118

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