When you lift heavy weights while restricting blood flow to your muscles, your muscles show bigger changes in oxygen use and blood volume during the workout than when you lift heavy weights normally—this means your muscles are working harder metabolically.

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.

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.

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.

New lifters of all ages and genders get stronger faster with heavy weights than with light weights and blood flow restriction — no matter how long they train or whether they're male or female.

Some people build more muscle with heavy weightlifting alone, while others build more muscle when they add a special band to cut off some blood flow—so everyone might need a different kind of workout to get the best results.