SpO2 is a parameter that is widely used to measure the oxygen saturation level in the blood. During times of COVID 19 too, SpO2 was being used widely to assess the wellbeing of a patient. The concept of SpO2 is now applied to shooting sport to find the right timing of the shot. This timing is dependent on the individual shooter as each person’s capacities would be different. The principles outlined here could be used to understand the optimal triggering time of any shooter.