Start in a kneeling position.
Tie a resistance band around the heel on your affected side.
Secure it around a sturdy object on the same side as this leg.
Lift your other knee forward and place your foot on the floor in front of you, taking your hips forward towards this foot a little.
Keeping 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.