# Cable Unilateral Bicep Curl - Canonical: https://fitwill.app/exercise/10776/cable-unilateral-bicep-curl/ - Media ID: 10776 - Primary muscle: Biceps - Body part: Upper Arms - Equipment: Cable Handle - Video: https://fitwill.app/videos/10776/cable-unilateral-bicep-curl.mp4 ## Description The Cable Unilateral Bicep Curl is a single-arm biceps exercise performed on a cable machine with a low pulley and a single handle. What makes this version distinctive is the cable path: you stand facing away from the machine, so the cable runs behind your body and pulls your working arm back and down. From that stretched position, you curl the handle up and forward toward your chest, keeping your upper arm and torso still while only the elbow joint moves. Because the resistance comes from a cable rather than a dumbbell, the tension on the biceps stays smooth and consistent through the entire range of motion, including the fully straightened position at the start where the arm sits slightly behind the hip. That bottom position is where the long head of the biceps is placed under its greatest stretch, something many front-facing curl variations skip entirely. The single-arm setup also lets you work each side independently, which helps you notice and correct strength differences between arms. This movement suits anyone with access to a cable machine, but it is especially useful for lifters who feel their curls stall at the bottom, people who swing heavier dumbbells with their lower back, and anyone who wants a strict, joint-friendly way to load the biceps in a lengthened position. The staggered stance and cable angle give you feedback instantly: if your torso shifts or your elbow drifts, the weight stack lets you know. To execute it well, set the pulley to the lowest position, take the handle in one hand, and step forward a pace or two so the stack lifts and the cable pulls your arm slightly behind you. Brace your core, keep your chest tall, and curl by bending only at the elbow, letting the handle travel up toward your shoulder or the front of your chest. Squeeze at the top, then lower under control until the arm is fully extended behind you again before starting the next rep. A few practical points make a real difference here. Keep the working elbow close to your ribs rather than flaring it out, resist the cable's pull on your shoulder at the bottom, and choose a weight you can pause with at full stretch. Finish all reps on one side before switching hands, and check that the cable is clear of your legs and body throughout the set. ## Instructions 1. Set a single handle on the lowest pulley of the cable machine and select a light-to-moderate weight. 2. Grip the handle with one hand and step forward so your back faces the machine, placing the cable behind your body in a staggered stance with your opposite foot forward. 3. Let your working arm hang fully extended slightly behind your hip and allow the cable tension to pull the shoulder back gently; stand tall with your core braced and ribs down. 4. Pin your elbow against your side and keep it there for the whole set, with only the forearm moving. 5. Exhale as you bend your elbow and curl the handle up and forward toward your chest, turning your palm up as you lift. 6. Pause briefly at the top and squeeze your biceps with the handle close to your body, not out in front of it. 7. Inhale as you lower the handle slowly along the same path until your arm is fully straight and slightly behind your body again. 8. Keep the torso quiet through the return; do not lean back on the curl or jerk forward on the way down. 9. Complete all repetitions on one arm, then switch hands and reset your stance for the other side. 10. When finished, step back toward the machine and release the handle once the cable tension is fully off. ## Tips & Tricks - If your shoulder gets yanked forward at the bottom, you have stepped too close to the machine; take a small step forward so the cable angle behind you is shallower and gentler on the shoulder. - The most common fault with this setup is turning it into a row by pulling the handle to your ribs instead of your shoulder; if your elbow slides back, the weight is too heavy. - Letting the torso rotate toward the working arm steals tension from the biceps; keep both shoulders squared forward and treat the trunk as a fixed frame. - The fully stretched position with the arm behind the hip is the hardest part of the rep; use a controlled two-second descent there rather than bouncing out of the stretch. - Start each set with your weaker arm and match the reps with the stronger side rather than the other way around. - Keep a slight bend in your front knee and settle your weight into both feet; the staggered stance is there for stability, not for leaning into the pull. - Avoid wrapping your thumb loosely around the handle; a firm full grip keeps the wrist neutral and stops the handle from rattling at the top. - If your wrist bends back sharply at the top of the curl, the load is exceeding your forearm strength; drop a plate or two and keep the knuckles aligned with the forearm. - This exercise pairs well after a heavier two-arm curl, using lighter weight for extra volume on the stretched portion of the range. ## Frequently Asked Questions ### Which muscles does the Cable Unilateral Bicep Curl work? The biceps brachii is the primary mover, with the brachialis and brachioradialis assisting. Because the arm starts behind the body, the exercise places extra emphasis on the stretched long head of the biceps. ### Why should I stand facing away from the cable machine for this curl? Facing away means the cable pulls your arm behind you, which keeps tension on the biceps even when the elbow is fully straight. Standard curls in front of the body lose resistance at the bottom, while this setup keeps it there. ### Is the Cable Unilateral Bicep Curl suitable for beginners? Yes, provided you start light and learn the cable path first. The single-arm setup actually helps beginners because it makes swinging and body English obvious, so lighter weights with strict form are the natural choice. ### How is this different from a regular dumbbell biceps curl? The dumbbell version has gravity pulling straight down, so tension fades as the arm straightens. The cable pulls backward and downward behind you, maintaining resistance through the entire range and adding a stretch component at the start of each rep. ### Where exactly should my elbow stay during the movement? Keep the elbow pinned beside your ribs, just behind the line of your torso. If it drifts back you turn the curl into a row, and if it swings forward the biceps stop doing the work. ### Can I do both arms at the same time with this setup? Not with this particular position, since the cable runs behind the body to one handle. Use two handles and two low pulleys for a bilateral version, or simply alternate arms within the set. ### My shoulder feels pinched at the stretched position. What should I adjust? Step a little farther from the machine to soften the backward pull, and reduce the weight so you can own the bottom position. The stretch should feel deep in the biceps, never sharp in the shoulder joint. ### What weight should I use for the Cable Unilateral Bicep Curl? Pick a load you can curl strictly for 10 to 15 reps while pausing at the top and lowering slowly from the fully stretched position. Because the stretched start is demanding, most people use less weight here than on a standard dumbbell curl. ### Should I supinate my grip during the curl? Yes, let your palm rotate upward as you curl from the semi-neutral grip behind your body. That forearm rotation is part of the biceps' function and adds to the contraction at the top. ### How many sets and reps work well for this exercise? Two to four sets of 10 to 15 reps per arm is a solid range, since the cable provides smooth tension that suits moderate loads and controlled tempo. Rest about 45 to 60 seconds between sides.