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. 2026 Sep 7;14:1896650. doi: 10.3389/fpubh.2026.1896650

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Copyright © 2026 Bu, Zhu, Zhao, Xu and Song.

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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Hexbin plot showing the relationship between body mass index in kilograms per square meter and total physical-fitness score, with color scale indicating the logarithm of the number of records. Highest density occurs at lower BMI and higher fitness scores. — Hexbin density of individual BMI versus total physical fitness score across all 106,461 records.