Lying EZ-Bar Tricep Extension (Skullcrusher)

Default prescription & biomechanics

Primary muscles

Triceps

Equipment

Ez Bar

Movement pattern

Isolation (Push force)

Difficulty

Intermediate

Working rep range

8-12 reps per set

Between-set interval

90 seconds rest

Intensity & MET

Moderate (3.8 MET)

Step-by-step coaching cues

1. Lie on a flat or slight incline bench and angle your upper arms 15 degrees back toward your head.
2. Lower the EZ-bar toward your forehead or just behind the crown of your head to keep constant tension on the long head.
3. Extend the elbows smoothly back to the starting angle.

Joint & safety considerations

Filtered for Elbow sensitivity. When you flag elbow sensitivity in your WorkoutCard training brief, the AI programme generator automatically substitutes a lower-stress alternative from the relations table below.

Biomechanical alternatives & swaps

Used by the in-app Swap sheet when your equipment is occupied or when adjusting exercise difficulty.

Exercise	Relationship	Equipment
Band Overhead Single Arm Triceps Extension	Bands swap	Bands
Band Overhead Single-Arm Triceps Extension	Bands swap	Bands
Band Overhead Triceps Extension	Bands swap	Bands
Barbell Lying Extension	Barbell swap	Barbell
Cable Alternate Triceps Extension	Cable swap	Cable
Cable High Pulley Overhead Tricep Extension	Cable swap	Cable

From the WorkoutCard biomechanical library (613 verified movements). For general strength and conditioning education, not medical or physiotherapy advice.