Start by leaning forward, placing one hand on the bench. Then with your free hand, pick the kettlebell up from the floor and straighten your back.
Pull your elbow back towards the hip, once your elbow is bent at 90 degrees begin to slowly lower back to the start position. Engage your core throughout to keep a neutral spine. Always perform the movement in a slow and controlled manner. Repeat for the desired amount of repetitions then switch sides.
Avoid rounding your back during or using excessive momentum.