# Cable Standing Single Arm Horizontal Triceps Exten - Canonical: https://fitwill.app/exercise/8614/cable-standing-single-arm-horizontal-triceps-exten/ - Media ID: 8614 - Primary muscle: Triceps - Body part: Upper Arms - Equipment: Cable Machine - Video: https://fitwill.app/videos/8614/cable-standing-single-arm-horizontal-triceps-exten.mp4 ## Description Cable Standing Single Arm Horizontal Triceps Extension is a one-arm triceps exercise performed with a cable pulley set at roughly shoulder height. You stand facing away from the machine, hold a single handle with one hand, and extend your arm straight forward so the push happens along a horizontal line at chest-to-shoulder height. Because the resistance pulls back toward the stack rather than straight down, the triceps work through a different angle than a standard pushdown, and the elbow stays elevated throughout the rep. This movement is especially useful for lifters who want to isolate one arm at a time. Training one side exposes left-to-right strength differences, lets you correct a weaker arm without the stronger side compensating, and frees the shoulder blade to move naturally since nothing forces both arms into a fixed pattern. It also suits people who find overhead triceps extensions uncomfortable but still want a pressing-angle stimulus for the triceps. The primary muscle worked is the triceps brachii, all three heads, with the long head contributing strongly because the arm is raised in front of the torso. The front of the shoulder helps hold the upper arm in position, and the core works quietly to stop your torso from twisting as the cable pulls back and to the side. The cable provides smooth, even tension from the first inch of the extension to full lockout, which is hard to achieve with free weights in this position. Setup matters here because the pulley height and your distance from the machine determine the resistance curve. Set the pulley at or just below shoulder height, step forward until the cable is taut at the start, and stand far enough out that the line of pull stays horizontal. If you stand too close, the cable sags at the bottom of the rep; too far, and the start position becomes awkward. Keep the working elbow fixed at shoulder height so the triceps, not the shoulder, drive the movement. To execute well, brace your trunk, raise your elbow so your upper arm is roughly parallel to the floor, and press the handle forward until your arm is straight and level with your shoulder. Squeeze briefly at full extension, then let the handle travel back under control until your elbow reaches a comfortable bent position near your ribcage-to-shoulder line. Complete all reps on one side before switching hands. This exercise fits well as a second or third triceps movement on an arm or push day, after heavier compound pressing. It is also a common choice in rehab-informed training and upper-body hypertrophy blocks, where the single-arm cable setup gives a controlled, low-skill way to load the triceps without stressing the elbows with heavy dumbbells or barbells. ## Instructions 1. Set the pulley of the cable machine to shoulder height and attach a single handle. 2. Grip the handle with one hand and step forward, facing away from the machine, until the cable is taut with your arm bent and your elbow near your ribs. 3. Raise your elbow so your upper arm is about parallel to the floor, pointing forward, and turn slightly sideways to the stack if that feels more stable. 4. Place your feet roughly hip-width apart, soften your knees, and brace your core to keep your torso from rotating. 5. Press the handle forward by straightening your elbow, keeping the upper arm steady at shoulder height the whole time. 6. Extend fully until your arm is straight and level with your shoulder, and pause for a beat with the triceps contracted. 7. Bend your elbow slowly and let the handle travel back toward your body until you feel a mild stretch in the triceps, keeping the cable taut. 8. Exhale as you press forward and inhale as the handle returns to the start. 9. Finish all planned reps on one arm, then re-grip with the other hand and match the repetitions. 10. Release the handle carefully between sets and step clear of the cable path before adjusting the weight. ## Tips & Tricks - The most common error is letting the elbow drift up or back as you press, which turns the rep into a shoulder move. Cue yourself to pin the upper arm at shoulder height and only bend and straighten the elbow. - Do not twist your torso toward the machine to help the handle forward. If your trunk starts rotating, drop the weight slightly; the anti-rotation demand is part of what makes the single-arm version valuable. - Avoid snapping the elbow into full lockout. A brief, deliberate squeeze at extension trains the triceps better and is kinder to the joint than a hard ballistic finish. - Control the return. Because the cable pulls back toward the stack at shoulder height, a loose return will yank your arm behind you; ride the eccentric for two to three seconds. - Start with a lighter load than you would use for a two-arm pushdown. One arm at a time plus the horizontal angle usually means the working triceps need less resistance than you expect. - If your shoulder complains when the upper arm is fully horizontal, lower your elbow a few inches so the press happens just below shoulder level. The triceps still do the work. - Keep your wrist neutral rather than flexed, so the force travels through the forearm into the triceps instead of loading the wrist. - Stand so the cable runs past the outside of your working arm, not across your face or neck, and check the line of pull before your first rep. ## Frequently Asked Questions ### Which muscles does the Cable Standing Single Arm Horizontal Triceps Extension work? The triceps brachii are the prime movers, including the long head because the arm is raised in front of the torso. The front delts help hold the upper arm in position and the core stabilizes against the sideways pull of the cable. ### How is this different from a standard cable triceps pushdown? A pushdown pulls the cable downward with the elbow at your side, while this exercise presses forward horizontally with the elbow at shoulder height. The raised arm positions the long head of the triceps under a longer stretch, and the cable direction changes the resistance curve. ### What height should I set the pulley at? Set it at or just below shoulder height so the cable runs level when your arm is extended. Too high or too low and the line of pull tilts, pulling your elbow out of position during the rep. ### Is this exercise suitable for beginners? Yes. The single-arm cable setup is easy to learn, the weight can be kept light, and the machine guides the resistance path. Beginners should focus on keeping the elbow fixed and the torso still before adding load. ### Why do my shoulders join in during the Cable Standing Single Arm Horizontal Triceps Extension? Usually the weight is too heavy, so the front delts kick in to push the whole arm forward instead of just the elbow extending. Lower the load, re-pin the upper arm at shoulder height, and think about straightening the elbow only. ### Can I use a rope attachment instead of a single handle? Yes, a rope or other single-hand attachment works, and turning the wrist slightly outward at lockout with a rope can feel more comfortable for some people. The setup and movement path stay the same. ### How many sets and reps should I do? Two to four sets of 10 to 15 reps per arm fits most hypertrophy-focused programs. Because the triceps are a smaller muscle and the exercise is done one side at a time, moderate loads with clean form work best. ### Should I do both arms in the same set or one arm at a time? Complete all reps on one arm, rest briefly, then switch. Doing left-right-left without rest turns it into a limit-push on the second side; alternating arms within a set with no rest changes the training effect and makes load selection harder. ### Is it safe for my elbows? The cable provides smooth tension without heavy impact at the joint, which most people tolerate well. Still, avoid slamming into full lockout, keep the return controlled, and skip the exercise temporarily if you have active elbow pain and get it assessed. ### What can I substitute if my gym has no cable machine? A single-arm triceps kickback with a dumbbell uses a similar extended-arm path, though resistance peaks differently. A resistance band anchored at shoulder height behind you also recreates the horizontal press.