Doing heavy weightlifting with your legs squeezed to restrict blood flow doesn't make your muscles grow more than just doing heavy weightlifting normally — at least not for most people who haven't trained before.

When you do heavy lifting while restricting blood flow to your muscles, your muscles feel more burned and stressed during the workout than when you lift heavy without restricting blood flow.

When you do heavy lifting while restricting blood flow, your muscles work harder and get more 'burned out' during the workout than when you lift heavy without restricting blood flow.

If you lift heavy weights with a special band that cuts off some blood flow, it doesn’t make your muscles stronger or bigger than just lifting heavy weights alone—even though your muscles feel more burned.

If you're new to lifting weights, adding blood flow restriction after your workout won't make your muscles grow any more than just lifting weights by itself—even if you do the same amount of work.

You can build muscle just as well by lifting light weights with your blood partially squeezed off, as you can by lifting heavy weights—so maybe it’s not the weight itself that matters most, but how much your muscles burn and swell up.