Lie on your back on a flat bench or the floor holding a kettlebell with both hands above your chest. Keep your elbows pointed forward and close to your head. Slowly bend your elbows to lower the kettlebell toward your forehead or just behind your head in a controlled arc. Pause briefly at the bottom while maintaining tension in your triceps. Extend your arms by straightening your elbows to return the kettlebell to the starting position without locking out aggressively. Keep your upper arms stable throughout the movement and avoid flaring your elbows.
Log your kettlebell lying triceps extension skull crusher sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.