Allowing good ol' Isaac Newton to do all the work while sliding gently downhill from mountains with skiis is pretty much the exact opposite for hiking uphill with hurting knees. I recently visited the Alps for the first time ever during Winter and even if the lifts take me up the mountain and gravity takes me down, I have to admit that I was completely exhausted by evening time, so I would argue that also this trip warrants it's place in this hiking blog.
