There are other ELDOAs she could use, but this is a good one with which to start.
A friend of my wife who cannot get in to see me asked for my insight regarding a diagnosis of Degenerative Disc Disease. Specifically, she asked me about chiropractic or anything else I might suggest. My response is below in italics. NOTE: I do not recommend any of the below activities without a thorough assessment by myself or another qualified professional.
Chiropractic is likely not going to be the (permanent) answer.
I'd suggest ELDOA (at least the one pictured and maybe my class when I start it up). Here are the instructions for her: Lie down on back with butt and heels against wall.
Dorsiflex and invert the feet.
Take arms overhead and in line with the shoulders and externally rotate them.
Push sacrum to floor.
Look down with eyes and flex chin down without lifting head.
Push heels up toward ceiling.
Push hands away from shoulders.
HOLD for 60s, continually checking to see if you're doing all of the steps detailed above.
I'd cut out all PUFAs or at least all veggie oils (including what's in processed food--read labels). I'd also Minimize/eliminate alcohol, soy, and probably gluten. Removing these things will help with inflammation (pain), core function (helping to prevent further degeneration), and blood sugar handling (healing).
I'd drink water with a pinch of salt to help with hydration, histamine (pain/swelling), and up regulation of thyroid (healing). Stainless steel or glass and not plastic. In fact, I'd get rid of all plastics so that the exposure to xenoestrogens is minimized (see list). This will help prevent excess laxity when stability will be key.
Specific core work needs to be performed. My book would be a good resource, but I would probably suggest:
--TVA work (daily)
--Lower Abdominal #1 (daily)
--Horse Stance Vertical (daily)
--Oblique Raise (i.e. side plank, every other day)
Variables such as reps/sets/rest intervals I haven't specified as I haven't assessed her, but I'd err on the side of conservatism and do less rather than more.
Possibly also Prone Cobra every other day, but without a full assessment I'd recommend caution. All the above movements are available in my book which she can download off my website or we could get her a physical copy (http://triumphtraining.com/pages/holistic-strength-training-for-triathlon).
Posture is key, of course. So likely stretching of:
Again, all in my book.
Sleep from 10-6 would maximize anabolic/repair hormones.
Nasal/Diaphragmatic breathing would help balance the ANS and keep her healing 24/7.
A lot of info and sans assessment, but I know much if not all would help her.
Hope she finds something useful.