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. 2019 Apr 10;6:43. doi: 10.3389/fcvm.2019.00043

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Copyright © 2019 Runte, Brosien, Salcher-Konrad, Schubert, Goubergrits, Kelle, Schubert, Berger, Kuehne and Kelm.

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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Univariate meta-regression analyses investigating the dependency of absolute mean changes of HR and SV of mean resting HR and mean resting SV in healthy subjects for all stress intensities. First row: Correlation of mean resting HR and HR changes for light intensity (coefficient −0.653, p = 0.341, adjusted R² = 0%), moderate intensity (coefficient 0.022, p = 0.963, adjusted R² = 0%) and high intensity (coefficient −0.995, p = 0.143, adjusted R² = 3.45%). Second row: Correlation of mean resting SV and SV changes for light intensity (coefficient −0.0367, p = 0.839, adjusted R² = 0%), moderate intensity (coefficient −0.187, p = 0.36, adjusted R² = 0%), and high intensity (coefficient −0.346, p = 0.096, adjusted R² = 25.58%). Bubble size indicates study sample size.