From Runner's World.com

Treadmill training doesn't have to be monotonous. A new batch of machines offers enough workout programs, innovative heart-rate routines, and virtual courses modeled after outdoor environments to keep you going all winter long. In our quest for the most motivating models, we recruited a panel of experts to narrow the field. Then we let more than 100 members of the Michigan Athletic Center in East Lansing have their say. The result: an in-depth look at how ten top treadmills improve the same old runaround.