A cable keeps tension on the glute through the kickback. The torso stays quiet so the hip, not the lower back, creates the motion.

Diagrams show the shape of the movement. Follow the written steps before you add load.
Equipment. Cable machine, Ankle strap
Muscles. gluteus maximus. Also hamstrings, core
All Cheeked Up publishes general fitness education. It is not medical advice, physical therapy, or a promise that your body will change. Stop any exercise that causes pain and talk with a qualified professional about injuries, pregnancy, or health conditions before you train.
Equipment
A cuff that clips to a cable or a band so kickbacks do not depend on a loop sliding off your shoe.
About $22
Equipment
Cloth bands that do not roll into a rubber bracelet the moment you get warm. Useful for kickbacks, squats, and lateral walks.
About $34