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.

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 people do exercise with bands that squeeze their muscles afterward, some people’s muscles grow a lot, others barely grow at all—even though on average, the whole group doesn’t show much change. It’s like everyone reacts differently to the same workout trick.

When people who don’t usually lift weights do strength training with or without tight bands around their limbs after exercising, they do the same amount of work—but still end up growing muscles differently. This means the muscle growth difference isn’t because one group worked harder.

No matter how tight you make the band or how wide it is when you do blood-flow restriction training, your muscles still grow about the same amount — so you don’t need to stress over getting the exact settings perfect.

If you're a young guy new to weightlifting and you use a blood pressure cuff to restrict blood flow while lifting, it doesn't matter whether you squeeze the cuff while you're pushing the weight up or while you're resting between sets—either way, you'll gain the same amount of strength and muscle.