So I started on Leg Blasters today, in a word ouch!
http://www.backcountry.com/explore/train-eccentric-leg-strength-for-alpine-skiing?branch_used=true
I got through 2 and a half of the mini blasters after my run on the elliptical and it was going well until I got to the jump lunges. My knees didn't like them at all. I'll keep progressing these as best I can.