Fig. 4

Gradients of core temperature (TCORE) and non-vessel temperature (TNV) at baseline (Pre), after the warm-up (WU), the first exercise phase (FH), the second exercise phase (SH) and the 3 min recovery phase (REC + 3) between individuals with high and low running speed at the individual anaerobic threshold (vIAT, median split) in running session T1 (a), T2 (b) and T3 (c). TCORE was measured with the ANT+ sensor. Statistical significance: p < 0.05 (linear mixed effects model with Tukey’s post hoc test).