Exercise Guide
How to do cable lying triceps extension
Master the setup, range of motion, and tempo for safer, more effective reps.
Overview
The cable lying triceps extension is a superior way to isolate the back of the arms. Unlike dumbbells or barbells, where the weight feels 'light' at the top of the move, the cable provides a constant pull. This means your triceps never get a break until the set is over.
By lying down, you stabilize your torso and shoulders, allowing you to focus 100% on the elbow hinge. This is one of the most effective ways to build the 'long head' of the tricep, which gives your arm that thick, powerful look.
Why Use It
- Constant tension throughout the entire range of motion.
- Reduced joint stress compared to heavy barbell skull crushers.
- Easily adjustable to find the perfect angle for your elbows.
When to Use It
Use this as your primary tricep isolation move after your heavy presses (like bench or shoulder press). It’s perfect for high-volume hypertrophy training.
Instructions for Proper Form
Setup
- The Bench: Place a flat bench near a low cable pulley.
- The Grip: Use an EZ-bar or straight bar. Lie on your back with your head closest to the pulley.
- Starting Position: Press the bar up so your arms are straight and perpendicular to the floor.
Execution
- The Fold: Keeping your upper arms perfectly still, bend your elbows to lower the bar toward your forehead.
- The Depth: Stop just before the bar touches your head.
- The Extension: Use your triceps to push the bar back to the start. Squeeze hard at the top.
Coaching Cue: Imagine your upper arms are frozen in concrete. Only the forearms should move.
Common Mistakes
- Elbow Flare: Letting your elbows point out to the sides. Keep them tucked in line with your shoulders.
- Moving the Shoulders: If your upper arms move back and forth, you're using your lats and chest. Keep the shoulders locked.
- Wrist Collapse: Letting the weight bend your wrists back. Keep a strong, straight wrist.
Mistakes by Level
Beginner
- Moving the entire arm instead of just the elbow.
- Using too much weight and 'throwing' the bar up.
Intermediate
- Not going through the full range of motion.
- Losing tension at the bottom of the rep.
Advanced
- Failing to control the eccentric (lowering) phase.
Mechanics
Use these setup and execution anchors to keep the rep organized, repeatable, and easier to progress.
Movement Pattern
Isolation
Body Position
Supine
Load Style
Machine Guided
Muscles Worked
Primary
- Triceps
Secondary
None emphasized.
Stabilizers
- Core
- Shoulders
Setup Requirements
- Set a flat bench in front of a low pulley.
- Use a straight bar, EZ-bar, or rope attachment.
- Lie down with your head toward the machine.
Form Checklist
- Keep elbows tucked in; don't let them flare out.
- Upper arms should remain vertical and still.
- Lower back should stay flat on the bench.
Range of Motion
Lower the bar toward your forehead or slightly behind it, then extend until your arms are straight but not locked out.
Breathing Pattern
Inhale as you lower the weight; exhale as you drive the weight up.
Tempo Guidance
2 seconds down, 1 second squeeze at the top.
Caution Notes
- If you have 'cranky' elbows, try using a rope attachment to allow for a more natural wrist position.
Programming
Treat these guidelines as practical programming defaults, then scale load, volume, and frequency to match the rest of the training week.
Best For
- Building tricep mass.
- Isolating the elbow extensors.
- High-repetition 'pump' work.
Goal Tags
Rep Ranges
- 10-15 reps for muscle growth.
- 15-20 reps for endurance and tendon health.
Set Guidance
3 sets of 10-12 reps.
Rest Guidance
45-60 seconds.
Frequency
2-3 times per week.
Pairings
- Superset with Bicep Curls for a full arm pump.
- Follow up with Cable Pressdowns.
Audience Notes
- Great for all levels. Beginners should start light to master the 'still' upper arm position.
Substitution Targets
- Barbell Skull Crushers
- Dumbbell Tricep Extensions
Variations
Use progressions to increase difficulty when you master the movement, and regressions if you struggle with proper form or face mobility limitations.
Regressions
Cable Tricep Pressdown
Standing up is easier to coordinate than lying down.
Best for: Building basic tricep strength.
Progressions
Behind-the-head Cable Extensions
Lowering the bar behind the head increases the stretch on the long head.
Best for: Advanced hypertrophy.
FAQ
Common Questions
Should I lower the bar to my forehead or behind my head?
Lowering to the forehead isolates the triceps more directly, while lowering behind the head adds a stretch to the long head of the tricep. Both are effective!
Alternatives
Start with the closest related options, then browse fallback alternatives that keep the same primary training focus.