I did 8 rides on Saturday, and I have a bruise on my shin to show for it. (I found it didn't bother me too much, and this is the second time I've effectively marathoned it for an hour or so, but I definitely know what you're talking about).We rode this once yesterday and for me it hurt. It's fun, but it's just not something I can ride more than once. If anything it's gotten worse for me. I used to want to and did re-ride a few times in a row before it would hurt, but now after one ride I want to get off and head to another ride. I love parts of the ride, and parts of it I just find myself bracing to minimize the pain. Basically every short fast hill, especially the tilted ones, aren't much fun.