The gluteus maximus is the strongest and biggest muscle of the body. It is not only a hip extensor but also plays an important role in pelvic and spinal stabilisation 

How to do the exercise:

Attach one end of band near the floor and other end to your ankle.

Extend your hip against the band and slowly return, keeping your knee straight. Keep board parallel to ground. Keep your back and neck straight. Repeat 3 x10 reps.

Please be sure to speak to your physiotherapist before attempting the exercise