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Single-Arm Dumbbell Skull Crusher

Single-Arm Dumbbell Skull Crusher

Lie back on a flat bench holding one dumbbell straight over your shoulder with a neutral or pronated grip. Keeping your upper arm vertical and still, bend only at the elbow to lower the dumbbell toward the same-side ear or shoulder. Feel the triceps stretch, then extend your elbow to return to the top under control. Working one arm at a time lets you focus on a full range and even out strength differences between sides.

How it is executed

  1. Lie back on a flat bench holding one dumbbell straight over your shoulder with a neutral or pronated grip.
  2. Keeping your upper arm vertical and still, bend only at the elbow to lower the dumbbell toward the same-side ear or shoulder.
  3. Feel the triceps stretch, then extend your elbow to return to the top under control.
  4. Working one arm at a time lets you focus on a full range and even out strength differences between sides.
Muscles worked
Triceps
Primary muscle
Triceps
Equipment
Dumbbell
Movement pattern
Push
Difficulty
Intermediate
What it is for
Hypertrophy

Variations and substitutions

Build the routine from these exercises, without the spreadsheet.