Tie a resistance band around both of your thighs, just above your knees.
Lie on your back with your knees bent, feet flat on the floor, and hip-width apart.
Raise your hips up into a bridge.
Keep your knees apart with tension in the band.
Keep one leg still and open the other knee out to the side.
Keep your hips high and pelvis level.
Return your knee towards the midline and repeat.