A method of determining anaerobic threshold from percutaneous oxygen saturation

Abstract

The anaerobic threshold (AT) is the point of the aerobic-to-anaerobic metabolic switch. Despite the many clinical applications of AT, this measurement requires sophisticated equipment and skills. Here, we investigated a simple measurement method for AT using percutaneous oxygen saturation (SpO2) and pulse rate (PR) with a pulse oximeter in a study of exercise stress on healthy volunteers. Twenty individuals (ten men and ten women) were included in the study. Various respiratory parameters, including AT, were measured using conventional analytical methods. The SpO2 threshold (ST) was calculated using the SpO2-Slope method. The mean ± standard deviations SpO2 at ST was 97.8% ± 0.3% in men and 99.0 ± 0.3% in women. The concordance and interchangeability between ST and various five different types of AT, the ventilatory equivalent for oxygen (VE/VO2_AT), V-Slope (V-Slope_AT), ventilatory equivalent (VE_AT), respiratory exchange ratio (R_AT), and partial pressure of end-tidal oxygen (PETO2_AT) were generally high, with positive correlation coefficients in the range of [0.68–0.80]. These findings suggest that the SpO2-Slope method with a pulse oximeter may be a useful and simple method to determine AT compared to conventional methods.

Real-time monitoring tool for heart rate and oxygen saturation in young adults

“…Regular monitoring of BPM and SpO2 levels can provide valuable insights into the body's physiological state, and may help identify potential health problems before they become more serious. This is especially important in today's world, where young adults may be at increased risk of developing respiratory illnesses, including COVID-19 [4]- [6]. In addition to respiratory illnesses, young adults who engage in certain activities such as endurance sports or weightlifting may also benefit from monitoring their BPM and SpO2 levels during exercise to ensure they are performing at a safe level [7], [8].…”