I recently bought of iTunes Andy kirkpatricks little e-book on strengthening you're legs for winter climbing.
Check out this book on the iBookstore: “PVKD2 Legs” by Andy Kirkpatrick https://itunes.apple.com/WebObjects/MZStore.woa/wa/viewBook?id=536075920
After reading it one of the techniques is great and rocks you're legs the first couple of runs. It left me in bits for the first three day.
You basically run on the balls of you're feet using them as a hinge, you reduce impact and it turns you're calves to iron.