Extreme Workout Machine

If you're ready for an extreme workout, the NordicTrack Teton Trekker may be for you. The hiking simulator can "lead" you to trails with steep inclines. Named after the Grand Teton National Park in Jackson Hole, Wyo., the NordicTrack Teton offers 26 preprogrammed hiking and trail workouts with moderate, challenging and extreme trails. Users can chart their progress for each trail from the base to the summit on the detailed Navigator console. Walking on an incline allows you to burn more calories. For example, a 150-pound person can burn 90 calories walking 2 miles per hour on a flat surface. By increasing the incline to 25 percent, the same person can burn up to 333 calories. The NordicTrack Teton allows users to choose inclines ranging from minus 5 to 50 percent. It sells for $2,300. www.nordictrack.com

Stephanie Oakes is a fitness correspondent for Discovery Health Channel, a contributing editor for USA Weekend Magazine and the LA Times, and appears on NBC's 'Today in New York'. She can be reached at soakes@beststuff.com.