Instructions:

1. Start by lying on your back on the floor with your knees bent and feet flat on the ground.
2. Hold a kettlebell in one hand, with your palm facing towards your feet.
3. Extend your arm straight up towards the ceiling, keeping your elbow locked and your wrist straight.
4. Slowly lower the kettlebell back down to the starting position, maintaining control throughout the movement.
5. Repeat for the desired number of repetitions, then switch to the other arm.