Hi there,
I have grade 2 spondy, along with severe stenosis and DDD. I was told by my PT, that any kind of "extension" exercise and/or stretch was out for me. However, I'm a very active 42-year old female that has pretty much lived with this condition for most of my adult life, and I basically follow the "if it hurts, stop" rule. I tried excluding extension work from my fitness routine, and found that my back felt even stiffer and tighter, when I did so. Perhaps I'm a unique case (as I've been told), but I stretch extensively throughout and following my daily workouts. I do both extension and flexion stretches, and if something doesn't "feel right", I stop immediately. I would think (and this is just my guess and/or opinion) that with her being a soccer player...sufficiently stretching the hamstrings would be crucial in keeping her back pain to a minimum. I find that tight hamstrings contribute greatly in regarRAB to my back pain. Hope this helps!
Edited to add: Would also like to point out...that with her taking lots of anti-inflammatories...especially if she is using NSAID's...she may become susceptible to bruising very easily. NSAID's are anti-coagulants and will thin the blood. I have this very problem from taking Naproxen (Aleve). I am covered in bruises, and I don't play a contact sport such as soccer. Just thought you should be aware of that.
Linda