You can make your muscles grow bigger by lifting very light weights if you restrict blood flow to your arm or leg — it tricks your body into thinking you’re lifting heavy.

For most people, lifting light weights with blood flow restriction builds muscle just as well as lifting heavy weights — making it a great option if you can't lift heavy.

When the total number of sets is the same, adding blood flow restriction to low-intensity weight training does not lead to greater muscle growth than high-intensity weight training alone in healthy young men.

Doing heavy weights followed by light weights with restricted blood flow might help power athletes build more muscle by keeping muscle growth signals turned on longer.

When you do blood flow restriction training—like wearing tight bands on your arms or legs while lifting light weights—you build muscle mainly because your muscles fire harder and earlier, not because of the burn or buildup of waste products.

People who already lift weights regularly get stronger and build more muscle from low-weight exercises with blood flow restriction than from heavy lifting, making BFR-RT a powerful tool for advanced athletes.