This isn’t some “cool gym trick.” This is one of the BEST back builders you can do. Because here’s the truth: When you lock yourself into the Smith machine like this, your body can’t cheat. Your hips can’t twist. Your form can’t fall apart. And when your back gets tired… the bar just stops. No momentum. No swinging. No biceps take over. You can load this heavier than 120 lbs with total control, and every rep hits your back the exact same way. That’s how real muscle is built..clean, repeatable re