The Mechanical Arm Flex: Seated Bicep Piston Station

Pressure Cascade · Mechanism

Step right up to the Mechanical Arm Flex, the machine bicep curl station where your arms go in as pipe cleaners and come out as pythons. This beginner exercise takes the bicep curl and puts it in a machine, which is like putting a wild animal in a zoo — it's more controlled, but it still packs a lot of power.

You sit in the machine with your upper arms resting on the pad and your hands gripping the handles or the bar. You curl the weight by bending your elbows, bringing the handles toward your shoulders, and squeezing your biceps at the top like you're trying to crush a lemon between your forearm and bicep. The machine's pad keeps your upper arms pinned in place, which means there's no swinging, no cheating, and no using your lower back to heave the weight up like a fish out of water. Every rep is pure, isolated bicep work, and your arms have no choice but to grow.

The machine bicep curl is perfect for beginners who want to build a foundation of arm size and strength, and for advanced lifters who want to isolate their biceps at the end of a workout when their grip and stabilizers are already fatigued. It's also the exercise where you're most likely to catch yourself staring at your own arms in the mirror, because the pump from machine curls is absolutely ridiculous. Your biceps will swell up so round and full that you'll look like you're flexing even when you're not. Which you will be. You'll be flexing constantly. It's a side effect. Sit down, curl up, and let the mechanical arm flex turn your biceps into works of art.