Lie on your back with both legs bent and feet flat on the floor.
If you are uncomfortable lying flat on your back, use a wedge cushion or pillows to prop yourself up.
Tighten your core muscles and pelvic floor.
Holding this position, lift one leg up keeping your knee bent to the same angle.
Control the movement with your muscles as you slowly bring your foot back to the floor.
Relax your muscles.
If your stomach muscles dome up at any point then stop the exercise.