Maintain a flat lower back with your knees straight and legs on the ground. Engage your inner core muscles below your belly button. Start by slowly raising one bent knee up to your chest and then return it to the start position by straightening out the knee and leg back down to the ground. Ensure that your lower back remains flat and the opposite knee and leg remains still.
Repeat this movement for 10 repetitions, doing 3 sets on both sides.
This exercise is a great progression to the Hip Flexor bent knee to address hip impingement pain with muscle imbalances and weakness coming from your hip flexors.
If you have any pain during the exercise or are unsure about what you are doing, consult your local Physiotherapist before continuing.