Sciatica Comes and Goes

I'm having some problems with sciatica in my left leg. I use to have it in my right leg but that hasn't happened in over a year. 

I ran 6.2 miles today on the treadmill in just over an hour. I alternated running 6.0 and 6.2 mph after warming up at 5.8 mph for 2 miles.

It's funny but the sciatica does not bother me when I am running or walking. It especially hurts when I sit in a stuffed chair. I've been using wooden chairs and laid on the floor 1/2 the night and it seems to have helped; the pain is almost gone again like Monday.

I'll take tomorrow off except I need to roto-till the garden some.