Hi isobel,
I, too, used to love exercise, but with my injury, exercise actually causes bad migraine type headaches. These headaches have not lessened in the 3 years since the return of my symptoms.
Even last night I tried to ride my road bike on my indoor trainer for 45 minutes in first gear. Before bed and now this morning, I'm getting a bad headache. 3 years later and this still sucks.
Neurologist and PsyNP have me on 100mg of Nortriptyline, which got rid of the daily headache and emotional roller coaster from this injury, but nothing I can take allows me to try to stay healthy.
I realize that I'll never get back to where I was, but I'd really be happy with 25%.