Starting in a lunge position with right foot forward (or left) and left back (or right). Bend knees (being mindful the front knee does not come over your toes) as low as you can without back knee hitting the ground then exhale and “explode” up so both feet come off the ground then land in same position and repeat. I suggest you either don’t use weight for this or if you are going to have db’s rather than a bar to protect your spine.
