Fig. 3From: Identification of heart rate dynamics during moderate-to-vigorous treadmill exerciseSpread of estimated k and \(\tau\) values for \(v_1\)-moderate (circles) and \(v_2\)-vigorous (crosses) conditions. The star depicts the overall mean values [the overall nominal model, Eq. (2)] for all 48 measurements. The rectangular box bounds the 95 % confidence intervals for the overall means of k and \(\tau\) Back to article page