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. 2020 Apr 2;11:218. doi: 10.3389/fneur.2020.00218

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Copyright © 2020 Monroe, Cecchi, Gerges, Phreaner, Hicks and Small.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Weighted cumulative head impact exposure (wCHI) measured in 18 intercollegiate water polo athletes across 11 games. wCHI is a unitless composite measure: the sum of principal component scores which represent the normalized kinematics registered for each confirmed head impact.