Ready to finally make the leap from greens and blues up to black diamonds? Don't wait until you're on the slopes to practice — start training for those harder runs now. "Dry land conditioning allows you to strengthen the muscles you use most while skiing and develop power and agility off mountain, so that you're more successful when you actually put on those skis," says trainer/ski instructor Jennifer Lockwood, owner of Peak Fitness NW and training director at Mt. Hood Meadows Ski Resort. Perform this ski-specific workout two or three times a week, and you'll be better prepared to shred some serious powder in no time.