Start on your hands and knees, with your hands under your shoulders and knees under your hips.
Tie a resistance band around the heel on your affected side.
Secure it around a sturdy object.
Keeping your hands and knees in the same position, pull your foot attached to the resistance band inwards, pivoting around your knee.
You should feel an effort pulling against the band.
Control the movement as you move your foot back to the starting position.