When performing this exercise you will need a barbell and a wooden block, stepper or something similar that is approximately 2 inches of the ground.
Some people perform this exercise on door steps, but it is not the most practical option.
Position your back under a barbell, holding it with both hands at the sides.
Position your toes and front part of the feet on the block. Your heels are resting on the floor.
Raise your heels by extending ankl