Originally Posted by
tahoe_girl
My commute home from work is about 16 miles or so, and I incorporate hills on my route. One thing I noticed the past two days is my back bothers me mainly when I'm doing climbs and not so much on the flats. I have bar ends so I am able to adjust my positioning here and there, but the climbs are a bit more uncomfortable on the back.
I've biked 10+ hours with a flat bar with bar ends, so I wouldn't think that's your issue. I would keep your saddle where it is but try raising your bar (handlebars, I mean) by an inch or so and see how that works.