Blood Flow Restriction (BFR) is gaining a cult following among elite athletes. Pro boxer Chris Billam-Smith is a fan. Players at Super League rugby club St Helens swear by it. Numerous Super League, Premier League and Rugby Premiership teams use it.

BFR training involves using a flexible band or cuff to reduce blood flow to the arm or leg muscles while performing low-intensity exercise. The theory is that the cuff allows oxygenated blood to flow into the working muscles but restricts the return of deoxygenated blood, prompting a strong adaptive response—even when lifting light loads—and increasing muscle fiber activation.

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