hm, just thought of something - if I've been sitting too long and feel like my legs are stiffening up I sometimes do this on purpose, hit the next hill "jerkily". The opposite of spinning, I yank on the handlebars and throw my weight forward on the downstroke, yank the pedals on the upstroke. My knees tend to seize up a little if I sit for a long time spinning steadily, and a minute or so of this just helps to stretch my legs and loosen up.
No idea if this is at all what you're talking about
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett