A proper hip flexor stretch

Hip Flexor Stretch: Kneel onto one knee. Perform a gentle pelvic tilt by contracting your abdominal muscles. This motion is similar to "rolling the belt buckle toward the nose." When the pelvic tilt is performed, a slight stretch should be felt down the front of the thigh. If no stretch is felt with the pelvic tilt, then leaning forward slightly is allowed but the pelvic tilt must be maintained and the back should be straight. If no stretch is felt in this position then it is not necessary to stretch this muscle group. Again it is important that the stretch should be light to moderate in intensity. 3 times each leg, holding 20 seconds.