Top end anaerobic umph! I coulda used some of that yesterday when dh and I did the Stinky Spoke ride in Woodinville! I've done this ride a couple of times (before the Hysto and back problems)and squeeked by with some half-@$$ed training on parts of the course. Recently, they've reversed the course so it starts out with a climb up a hill with a 20% grade (guess who was walkin'that...) and just generally it seemed harder to me. Of course, I'm heavier this time, and older, and was trying to do it on a cyclocross bike. Saw lots of fatbikes, seemingly floating up those hills and tearing down the descents without a care in the world. I made it through, though. Thirteen miles of climbey gravel pipeline trail and well groomed woodsy bits and 5 miles along the Sammamish River trail where I passed with pleasure, a large number of the properly equipped mountain bikers who had passed me earlier. If I do this ride again next year, I would have to do it on a proper mountain bike--but that would mean buying yet ANOTHER bike! Not sure I can do that...