Stepping backward is often easier to control than stepping forward. The front leg trains the glutes and quads while you keep your balance.

Diagrams show the shape of the movement. Follow the written steps before you add load.
Equipment. Bodyweight
Muscles. gluteus maximus, quadriceps. Also hamstrings, gluteus medius
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
Small loop bands for clamshells, bridges, and warm-ups. Latex is cheaper and snappier than fabric. It also rolls if you size it wrong.
About $18
Equipment
A mat for bridges, clamshells, and knees that would rather not meet the floor directly.
About $40