Stand with your feet hip width apart with a kettlebell raised in one arm, retaining a firm grip on the kettlebell and your other hand placed on your hip; ensure that your shoulders are positioned upright, keeping your back straight and eyes straight ahead. With your arm fully extended overhead, take a step back with your right leg, bending your knees until you're in a lunge position (be sure to keep the arm fully extended overhead throughout the movement). Repeat the sequence for the required number of reps.