Hi....there is a list of activities to avoid with both Chiari and Syringomyelia....here is the link -
http://www.medhelp.org/health_pages/Neurological%20Disorders/Activities-to-avoid-with-Chiari-and-Syringomyelia/show/986?cid=186
It is also helpful to keep a journal of what activities are done, and how one feels....if happy, stressed etc...this may help to see what can be done and what needs to be avoided for her.
We sometimes need to rest up in order to have a full day out and about and then we need a few days to recoup.....
Getting plenty of rest....along with some exercise...walking ....no straining, lifting, pulling or pushing...as those can cause a flare up....
For me a warm soak in the tube to help relax listening to music...helped me when I was not feeling well....
She has to listen to her body as to what she can and can not do....