> CLIMB A MOUNTAIN, SKI ACROSS COUNTRY, OR WALK IN THE PARK

can be described as somewhere between the circular motion of a bike and the flat motion of a treadmill. Most better quality elliptical trainers are equipped with a range of pre-set programs, essentially a series of varying resistances designed to simulate differing uphill gradients (sorry, no downhills). Programs let you choose the level of intensity for your workout—and also vary your workouts so your exercise program is never a dull routine.