Exercise library / Skullcrusher (Lying Triceps Extension)
Isolation · Isolation
Skullcrusher (Lying Triceps Extension)
Skullcrusher (Lying Triceps Extension) is a single-joint exercise focused on the triceps. Use a deliberate tempo and a full range of motion — momentum steals the tension this movement exists to create. It loads the target muscle in a deep stretched position, which makes it a strong hypertrophy choice.
Primary muscles
Triceps
Secondary muscles
None to speak of
Equipment
Barbell, Dumbbell
Movement pattern
Isolation
Type
Isolation (single-joint)
Substitutions
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Overhead Triceps Extension
Same isolation pattern · also trains the triceps.
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Cable Triceps Pushdown
Same isolation pattern · also trains the triceps.
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Close-Grip Bench Press
Also trains the triceps.
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