This feasibility study (“Soccer Study”) was performed in adolescent female soccer players wearing the Q-Collar during a season of competitive soccer. Two high school girls soccer teams participated in this prospective longitudinal study that used also used advanced DTI imaging to help determine whether IJV compression provided long-term beneficial protective effects over three time-points spanning nine months. As in the Football Study, the control and intervention groups both wore accelerometers that were used to collect daily head impact data in excess of 20 g.
The DTI data revealed significant white matter changes from pre- to post-season scans of the members of the control group. Those changes only partially reversed themselves during the 3-month post-season period. Despite similar head impact exposure, the intervention group (who wore the Q-Collar) did not have significant changes to their white matter. The mitigation of white matter changes in the group who wore the Q-Collar indicates the potential beneficial effect of IJV compression.
Review the full study: British Journal of Sports Medicine