+1 on the riser bars. And not just for the rise they provide. What I've seen with most riser bars is that they have a lot more angle back and up than the flat bars. That angle can be tuned by how you pivot the bars in the stem to help give your wrists a more natural flow so your forearm and hands are more inline with each other. At the same time the rise WILL lift up your front so you even out the pain thresholds.
It's not a bad idea when you're coasting to take a lot of your weight on your leg(s) depending on how the pedals are when you coast. Just lifting the load off for a few seconds here and there during the riding can really make a huge difference in how long you can stay out riding.