When it comes to the back thing and riding, I think most of us riders have had back problems at one time or another. As well as a reliable mount, ( try somewhere where they have Riding for the Disabled horses because they are pretty even natured and smooth or a schoolmaster), you can get back supports designed especially for the lower back for riders. Look online at some of the UK sites - Robinsons or Derby House. Also, some people find that wearing a body protector when they first get back into riding can help keep their back in the correct position and therefore prevent pain. Just a few ideas anyway.
BBA - what kind of riding do you do and what sort of horses do you have? If you fancy a horsey chat sometime lissie has my email address. Saffie
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength