Crunches are okay to strengthen your abs, but in my opinion, they address just a part of overal core strength. My abs have always been strong; it's my back muscles that have been my biggest problem. It wasn't until I started to do yoga--a lot--that I noticed real changes in that department. It also helps me stretch my calf and hamstring muscles which, when tight, also affect my lower back. If I don't stay on top of that, I definitely feel more uncomfortable on the bike. Everything is SO connected. The more I ride, the more I get that.

OMG, I've been mispronouncing "celeste" this whole time. Eeeeck.