A strong core is vital for stability on the mountain, so the U.S. Ski Team emphasizes ab work. This killer exercise involves hanging from a pull-up bar, bringing your knees up to your chest and then extending your legs upward and out until your upper and lower body form a V. “You can’t do many reps of these,” says Per Lundstam, the U.S. Ski Team training center manager.

Why They Do It: Good skiing demands that you keep your core steady while your lower body is active. Perfecting the skill on dry land will pay off when it counts.