I find one of the most important things besides off season training, and mobility work, is how you start your season. I'm on the shelf for pretty much 8 months. If I start right out on the course it's pretty much a recipe for injury. Like any strength training program it needs to be progressive. Problem is your mind knows exactly how to do what your body won't allow. Free skiing to start, than short sets after, running starting passes. This is very important to me especially after a winter of work and feeling strong.