HOW: Get set up in a standing position with a kettlebell down on the ground in between your legs. Have your feet about shoulder width apart and slightly bend your knees. Hinge forward at the waist keeping your back flat and pick up the kettlebell with one hand. From here, keep your elbow in as you pull the weight up while you rotate only your chest towards the direction of the hand you're pulling the weight up with. Extend your opposite arm out and down to help with the rotation. Alternate pulling the weight up and down for the prescribed amount of reps.
FEEL: You should feel your shoulder and upper back muscles working as you pull the weight up and rotate.
COMPENSATION: Keep your hips facing forward, only rotate your upper half.