Stand with wider than shoulder width apart (slightly wider than a sumo lift position), hold a kettlebell close to your chest. The Cossack is basically a lateral lunging motion. The toes can be slightly pointed out or straight forward. From that position, tighten the midsection and back, and lunge laterally. The bent knee moves forward tracking straight over the toes and the foot and heel stay flat on the floor. The straight leg should rotate so the toes point upwards. How far you can get into a bottom position will depend upon your flexibility and mobility. Try to keep your back straight as you do this versus hunching the shoulders.