Wow! Between this blog post and some social media conversations, I am a bit clearer about whether or not to 'get on my bike'!
A physio friend has directed me to some suitable exercises that I can start whilst waiting for formal treatment, and given some guidance on better/less good exercises alternatives.
Cycling is getting mixed reviews - but at the same time I've had an offer of an exercise bike which will allow me to pedal away without worrying about traffic, hills and the like.
Aqua-aerobics, pilates and yoga are all being recommended as alternatives... and certainly worth looking into.
All feels very encouraging.