PT
Exercises / strength

Skull Crushers

Lying tricep extension — one of the most effective exercises for building overall tricep mass. Targets all three heads with particular emphasis on the long...

Difficulty

intermediate

Category

strength

Primary Muscles

Triceps

Equipment

Barbell, Bench

How to Perform

  1. Lie on a bench with an EZ-bar or straight bar, arms extended above your chest
  2. Keep your upper arms angled very slightly back (toward your head)
  3. Lower the bar by bending your elbows, bringing it toward the top of your head or just behind it
  4. Extend back to the start position by squeezing your triceps
  5. Keep your elbows pointing at the ceiling throughout

Tips

  • Keep your elbows pointing at the ceiling and shoulder-width apart — flaring them out is the most common form mistake
  • No barbell? Dumbbells work well, or use a cable machine lying on a bench for constant tension
  • Use a 3 second descent and a 1-2 second press — the slow lowering phase under stretch is what makes this exercise so effective
  • Going too heavy and losing elbow control is dangerous — start lighter until the movement pattern is locked in
  • Feel the stretch in all three tricep heads at the bottom and squeeze to full lockout at the top — the triceps should burn, not your elbows

Essential Equipment

EquipmentWhy You Need ItOur PickReview
BarbellEZ curl bar reduces wrist strain during the extensionOlympic EZ Curl BarRead Review
Weight BenchFlat bench provides the stable base you need for lying extensionsFlybird Adjustable BenchRead Review
Weight PlatesProgressive loading for steady tricep developmentBodymax Olympic PlatesRead Review

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