Figure 1
From: A method of determining anaerobic threshold from percutaneous oxygen saturation

Relationship between pulse rate and heart rate. The data is from the rest to the end of loading. The pulse rate was measured with a pulse oximeter, and the heart rate was measured with a heart rate monitor. The correlation was investigated by calculating Pearson’s correlation coefficient (r) and the p-value. Bpm beats per minute, HR heart rate, PR pulse rate, SpO2 percutaneous oxygen saturation.