B Strong BFR Training System Bands and protocols do not increase the risk of varicosities, if anything, they work toward reducing varicosities. Varicose veins are the result of incompetent valves in the veins linking the deep to superficial venous systems. They can occur for a variety of reasons, but one cause is pregnancy where the growing uterus and baby put 24/7 pressure on the iliac veins as they carry blood back to the heart. This fills up the deep veins, the interconnecting veins and the superficial veins. Because this is a passive, constant situation, the valves are stretched resulting in them becoming incompetent.
In contrast, during B STRONG training, venous outflow is restricted leading to distension in the veins and capillaries distal to the B STRONG Band, but then with exercise, the veins are repeatedly emptied and filled. This has been associated with a up-regulation of markers associated with vascular growth (VEGF, HIF-1a, etc.). The result of this temporary (~20 minutes) distending and emptying of the veins and capillaries is to improve their smooth muscle, which if anything works to reinforce the valves in between the deep and superficial venous systems. B Strong may actually result in making barely incompetent valves, competent again, which, in turn, may reduce the amount of varicosities. We have numerous anecdotal reports of reduced varicosities when regularly using the B Strong Training SystemTM.