False:
Blood flow restriction reduces arterial blood flow to working muscles while also occluding venous return.
(https://www.frontiersin.org/articles/10.3389/fphys.2019.00810/full)
Blood flow restriction (BFR) is a training method partially restricting arterial inflow and fully restricting venous outflow in working musculature during exercise.
When the cuff is inflated, there is gradual mechanical compression of the vasculature underneath the cuff, resulting in partial restriction of arterial blood flow to structures distal to the cuff
(Blood Flow Restriction Exercise: Considerations of Methodology, Application, and Safety - PMC)
I guess this is why BFR/occlusion “training” is dangerous for the medically/professionally unsupervised general populace — too much easily accessible forum babble.
Yes, studies have shown that BFR training might be “safe” for CAD patients (Blood Flow Restriction Resistance Exercise Improves Muscle Strength and Hemodynamics, but Not Vascular Function in Coronary Artery Disease Patients: A Pilot Randomized Controlled Trial - PMC), but to say it has no effect on arterial flow is flat out incorrect.
Science > bros.