Recent research shows that finding limb occlusion pressure is valid compared to the gold standard of Doppler Ultrasound for Blood Flow Restriction Therapy/Training. This is for the upper extremities/arms only at this time. The EDGE Finger Pulse oximeter is an alternative to clinicians or especially the public to find LOP. Pump up your EDGE Restriction System BFR Cuffs or similar slowly in 10 mmHg increments and wait until the pulse goes away on the display, then take the desired percentage of LOP for your BFR Workout!