For serious skiers, coach Ben Popp recommends 15 minutes of pre- and post-workout time with a SkiFast Ergometer machine. "Skiing takes lots of core and upper body strength," Popp says. "This machine fits in your basement and is a great way to work out your upper body and core." The machine simulates ski-poling with a flywheel and adjustable resistance. An onboard digital console gives real-time power feedback and overall stats on your Nordic-minded workout.