MRI scan?
Did it show hernia or 'herniated discs', which is doctor-speak for slipped discs?
Sciatic pain would go along with herniated discs. Various treatments are possible. Most cases will resolve without surgery (don't have surgery, IMHO!)
I had sciatica and slipped disc 10y ago. After a period of rest i was able to start exercising again, and (touch wood) - ok since. I'm going skiing next week, haven't rock climbed for a few years, but still go hill walking and mountain biking!
GL