1-Leg Deadlift (1 or 2 KBs)

Standing up, hold one kettlebell in the left hand with an overhand grip and the arm fully extended. Stand on your left leg only, while lifting the right foot slightly off the floor. Lower the kettlebell toward the floor while raising right leg back behind you. Be sure to keep your back straight and the knee of the left leg slightly bent. Keep the hip and knee of right leg extended throughout movement. Once you feel a good stretch in the left leg, or the kettlebell contacts floor, return to original position by raising torso back to a standing position, while also lowering lifted leg. Straighten the knee of supporting leg as torso becomes upright. Repeat with kettlebell in right hand, raising the left leg behind

(This can also be done with two kettlebells)