Great advice, I had the surgery 2 mo's or so ago, used laporoscopic procedure with mesh and things are already a lot better. I am not naive enough to think all I have to do is start running again without supplementing it with core strengthening and stretching, esp my tight hip flexors, a problem compounded by a spondylolisthesis which further accentuates an anterior pelvic tilt, causing an excessive strain on the abdominal attatchment to the pelvis. It is important to stretch the hip flexors in a standing position, remember to stretch in all 3 planes. I went to a Gary Gray seminar and he showed us a good stretch. Start by putting 1 foot up on a chair seat, reach arms overhead and extend backwards slowly, do this for 25-30 seconds or so. Move into sidebending while maintaining some extension and finish with some rotation, work in this position for a minute or 2 and repeat with the opposite leg.