Hip MET extension (Hip extension strengthening isometric, against hands, leg 90/90, supine)

Lie on your back and bend your affected leg, bringing your hip and knee to 90 degrees.
Place both of your hands behind your thigh just above your knee, interlacing your fingers.
Try to straighten your hip down towards the floor, while resisting the movement with your hands.
Hold this position, relax, and then repeat.