The cable incline triceps extension keeps constant tension on the long head of your triceps throughout the entire range of motion, making it one of the most effective tools for building arm size and strength. Master the mechanics here and you will carry that foundation into every pressing movement you do.
Set a cable pulley to the lowest position, attach a rope or straight bar, and lie back on a bench inclined to about 45 degrees with your head closest to the machine
Grip the attachment with both hands and extend your arms overhead so the cable pulls in line with your torso, upper arms locked vertical and still
Bend at the elbows only, lowering the attachment toward your forehead in a slow controlled arc while keeping your upper arms completely stationary
Drive through your triceps to extend fully back to the start, squeezing hard at lockout before beginning the next rep
Common mistakes
Letting the elbows flare wide and lose alignment, which bleeds tension off the triceps and stresses the joints, so actively pin your elbows in toward your centerline throughout every rep
Using momentum by swinging the upper arms forward and back, which turns the move into a shoulder exercise, so anchor your upper arms vertically and treat them as a fixed hinge point
Cutting the range of motion short at the bottom, which sacrifices the critical stretched position where the long head is most loaded, so lower with control until you feel a full stretch before reversing
Pro tip — Keep a slight posterior pelvic tilt and press your lower back gently into the bench as you extend, this braces your core against the cable pull and lets your triceps work in isolation rather than your whole torso compensating for the load.