@theiconicjoyce__: How to actually grow your lower back with the back extension machine. Adjust the bench pad to sit just below your hip bones. Lower your torso slowly with a straight spine, and return to a parallel line without hyperextending (arching backward at the top) to prevent spinal strain. #backexercise #backextensionmachineform #howtogrowback #bestbackworkout #howtodobackextension