Fig. 3

Associations between differences in non-vessel (∆TNV) and perforator vessel (∆TP) temperature with potential physiological influencing parameters within certain sections of the running protocols. (a) ∆TP during the first exercise half (FH) vs. sweat loss [g]. (b) ∆TNV during the first exercise half (FH) vs. forced expiratory flow during the first second (FEV1) [%]. (c) ∆TNV from baseline to the end of the first exercise half (Pre-FH) vs. running velocity at the individual anaerobic threshold (vIAT) [km/h]. (d) ∆TP from baseline to the end of the first exercise half (Pre-FH) vs. metabolic heat production (MHP) [W/m2] at end of the running session. Data points were color-coded by timepoint (T1, T2, T3), and 95% confidence ellipses were drawn to indicate the distribution of observations within each timepoint. Centroids for each timepoint were calculated and displayed, and the mean correlation coefficients (RMEAN) with 95% confidence intervals and correlation coefficients for each individual timepoint (RT1, RT2, RT3) were annotated in the top right corner of each plot.