Performing the: A Step-by-Step Tutorial Dumbbell Lying Floor Skull Crusher
Extend your arms straight up towards the ceiling, ensuring that your elbows are directly above your shoulders and your wrists are in line with your elbows.
Slowly bend your elbows, lowering the dumbbells down towards your temples, while keeping your elbows stationary and your upper arms perpendicular to the floor.
Once the dumbbells are near your temples, pause for a moment, then use your triceps to extend your arms back to the starting position.
Repeat this movement for the desired number of repetitions, making sure to keep your elbows in place and use your triceps to lift the dumbbells.