Obligatory back pic
I love(d) deadlifts, but as most of you are probably aware from my constant complaining, I've had chronic knee problems all my life and was forced to give up deadlifts, along with squats, in April of this year. That said, just last week the Army called me up to do some fitness tests (I'm on medical deferral for a year but they like to keep checking up on me to see I'm keeping myself fit) and I had to do deadlifts. I was hooked up to some kind of high tech machine and it was a single rep at best effort. I swear, I damn near killed myself trying. I could feel how red I was going and I could see every vein in my body looking like it was about to burst. I was making all sorts of funny noises. I glanced up to see the officers looking surprised and that only made me pull a little bit more. I hit 178kg - that's 392 pounds. I'm incredibly pleased with that as when I was deadlifting last year I seldom went over 100kg (220lbs, but I was doing lots of reps).
When (if) my knee heals, I can't wait to start deadlifting again because it's such a brilliant exercise. It's one of the few sessions where I actually
feel stronger afterwards. Stronger all over.
Like gamer alluded to, the pain after sessions will become less and less noticeable as your body adjusts to them (man, I must sound like such a windbag because this is pretty much the exact same advice I gave you when you asked about side stitches, heh). If it's any consolation I vividly remember the sore back sensation that accompanied my initial venture into the world of deadlifting...it's not nice but there's something strangely satisfying about it.
I'm assuming your technique is alright too? If not that would be a contributing factor to the soreness. There's like a million deadlift technique videos on youtube so take a look at them even if you're confident in your technique; I'm sure you'll learn something.