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. 2025 Aug 7;16:1620884. doi: 10.3389/fpsyg.2025.1620884

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Copyright © 2025 Gong, Yang, Hu and Mao.

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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Eight heat maps display correlation matrices for various physiological and path conditions, categorized by path type, slope, and age group. Each map uses color to show values ranging from -1 to 1, with specific correlations highlighted. Subfigures include: (a) Long path, uphill, young; (b) Long path, downhill, young; (c) Short path, uphill, young; (d) Short path, downhill, young; (e) Long path, uphill, elderly; (f) Long path, downhill, elderly; (g) Short path, uphill, elderly; (h) Short path, downhill, elderly. A color gradient bar from blue to red indicates correlation strength. — Site overview.