1) Do you sit down for long periods of time? Do you play sports or enjoy running? You likely feel sore or restricted in the hip flexors as a result. 2) Don't allow tight and immobile hip flexors play a role in a back pain and limit your speed, strength and overall enjoyment of physical activity. 3) Take these tissues through a variety of release and mobility drills and exercises to enhance their ability to contract and relax, thereby allowing for greater range of motion and comfort.