FlexDumbbell Skull Crushers
Muscles worked
- Triceps Brachii
- Anterior Deltoid
- CategoryPush
- Default target3 sets × 8–10 reps per side
- EquipmentDumbbells
- Movement patternIsolation Upper
- Training stylesHypertrophy, Strength
Technique
Setup
Lie flat on your back (floor or bench) holding dumbbells directly above your chest. Angle your arms back slightly toward your head (15 degrees).
Movement
Bend at the elbows only, lowering the dumbbells to the sides of your head. Extend back to the starting position.
Form Tip
By angling the arms back 15 degrees, you maintain constant tension on the triceps even at the top of the movement.
Increase Difficulty
Increase the weight or add a 3-second eccentric phase.
Decrease Difficulty
Perform one arm at a time for better control or use lighter weights.
Hear the cue
The trainer's spoken setup and form tip for this exercise — the same clips Flex plays in a session.