A few of my recent clients have hernia's, so I will post their progress. I had a client this summer (she had 3 children, last two were 18 mos old twins) who had a small umbilical hernia and after the first time she trained with me, reported her hernia went in and stayed in within two days of completing her exercises and wearing her splint. I regret not taking before and after pictures.
I have a current client who has done the program for six weeks. She had a hernia as well, and now the opening at her belly button is closed except 1/2 or 1/4 of a finger tip area. Her organs were completely easy to palpate above and especially below the umbilicus and now, only muscle is felt with light palpation.
Another current client, who did the exercises for 1 week and was able to decrease the diameter vertically and horizontally by 1/3, depth by roughly 1/2, and the appearance of the hernia completely changed. You could visually see it when she lied on her back, but now you cannot. she is a personal trainer and had to alter her way of training, cutting out any exercises in which she could not keep her transverse "in" at the 5th floor (belly button to her spine) and did 5 or more sets of Tupler contractions a day last week.
I currently have another client, who was scheduled for surgery last week, and was going to see me afterwards to strengthen her core. I suggested she try the Tupler Technique first, before going under the knife and having a whole new set of issues to deal with. Even if she is not able to heal her hernia, she would know how to use her core correctly and avoid undoing the surgery. I will keep you posted with her results!! She lives two hours away, so I am skyping her inbetween visits here, and will see her again in a few weeks.