I have a question about this episode Dr. Andy Galpin: How to Build Strength, Muscle Size & Endurance | Huberman Lab Podcast #65 and this Hypertrophy Training What is blood flow restricted training?

Blood flow restriction (BFR) training uses a cuff to restrict blood flow while you perform very light exercise, creating a stimulus for muscle growth despite the low load. 1

• 1. Exercise load: BFR may use little or no load, commonly about 20–30% of your one-repetition maximum, with sets taken to fatigue. 2
• 2. How it supports hypertrophy: The light load creates metabolic disturbance, offering a route to hypertrophy without relying on heavy mechanical tension. 3
• 3. Equipment and risk: Use proper BFR cuffs; simply tightening or tourniqueting a muscle is unsafe and can cause a blood clot. 4