HOW TO TEST FOR TIGHT HIP FLEXORS

The simplest way is the Thomas Test. Lie on your back on a bench with your bottom at the edge. Hug both knees to your chest to keep the spine neutral. Holding one knee, allow your testing leg to drop down and hang with the knee bent. Your spine should remain flat. Relax the hanging leg as much as possible. Good range is shown here (main pic left), where the knee hangs at horizontal or 10 degrees below. Anything above the horizontal is tight. See inset pic (top left) for an example of a tight hip flexor.