a, Raw breath signal and waveform after the low-pass filter. b, Raw heart rates and the average from the moving window of 10 s. Green markers show measurements from the OMRON blood pressure monitor mounted on the left forearm. c,d, Waveforms of heartbeat (c) and wrist pulse (d) during data collection for 3 min. The purple lines are the average waveforms of the 3-min data. The box-whisker plots in c are the statistical results at the minimum point (blue), rising deflection point (red), maximum point (green), falling deflection point (pink) and local minimum point (yellow). The box-whisker plots in d are at the minimum point (blue), rising deflection point (red), maximum point (green), local minimum point (pink), and local maximum point (yellow). e,f, DTW waveform analyses show the distance in each waveform of the heartbeat (e) and the wrist pulse (f). Insets: box–whisker distributions. g,h, Comparison of median- and maximum-distance waveforms with respective DTW template for the heartbeat (g) and wrist pulse (h). Sampling rate for the waveforms: 500 Sps.