Elliptical trainers

Tests of 22 machines include 3 Best Buys, 3 Don't Buys

Elliptical exercisers have been gaining ground in the marketplace in recent years. Our testers pedaled on 22 machines, evaluating exercise range, ergonomics, construction, safety, and more. Prices ranged from about $300 to $3,700. The pricier ellipticals generally have sturdier designs and more features, but simpler, less costly machines can offer a good workout, too. We recommend six models, including three CR Best Buys, but we also found three that you should stay away from.

All of these machines have pedals that run on an elliptical path. Most let you adjust the resistance to determine the intensity of your workout using an electronic resistance control. But some machines have mechanical controls that tend to be cumbersome and work poorly. We've begun seeing ellipticals with innovative design features that allow you to adjust the incline and stride length. Some machines allow you to adjust the incline enough to do a step-climbing-style workout. Many also have inputs for MP3 players, and one we tested offers a USB workout-tracking function.

Elliptical exercisers simulate the motion of running, the gold standard for cardiorespiratory fitness, while eliminating the impact, making them a good choice for those with joint problems or extra weight. They also might help strengthen your legs, hips, and glutes more than running because you can ramp up the resistance to work your muscles harder.

A workout on an elliptical exerciser can also help you improve balance. And ellipticals have an advantage that most treadmills don't: the ability to work in reverse, which stimulates the muscles differently, says Christina A. Geithner, a professor of exercise science at Gonzaga University in Spokane, Wash.

You can exercise strenuously on ellipticals, but the best machine for you is the one that inspires you to keep at it.