Connect a resistance band to the workout bar and attach the other end to a D-ring on an ankle strap. Do the same for a pair of resistance bands. Place the barbell behind your head and on the top of your shoulders.
Bend knees forward while allowing hips to bend backwards. Keep back straight and knees pointed same direction as feet. Descend until knees and hips are fully flexed. Then extend knees and hips until returned to original standing position. Repeat.
Keep head forward, back straight and feet flat on floor; equal distribution of weight through fore foot and heel. Knees should point same direction as feet throughout movement.