Hello, I am a 45yrs old having a spinal fusion on Dec.29 at 7:30. I'm glad, happy, sad, scared, sick of pain, an hoping for the best. I have a slipped vertebre L4-S1..My left leg has siatica and NOW i'm expiercing aching in my knee's..that almost unbearable. I feel hopeless on day's cause I was so active I never sat down. Glad I have all of you here.