Arc Trainer Vs. Treadmill
The Arc Trainer is a piece of cardio equipment produced by Cybex International. The design simulates running, but you stand on independent pedals that swing in a crescent pattern. This motion makes sure your joints don't incur impact as they would on a treadmill. According to Cybex, you burn 16 percent more calories using an Arc Trainer than a standard elliptical trainer, and your body moves in an optimal path. You'll also experience less stress on your joints than you might when running on a treadmill.
When to Use
If your goal is to build cardio fitness, an Arc Trainer and a treadmill can both help you reach your goals. You might choose an arc trainer over a treadmill if you have knee, ankle or back problems. An Arc Trainer is not a replacement for running on a treadmill if you preparing for an event that involves running, though. It is useful for cross training -- to maintain cardiovascular fitness and challenge your muscles in a slightly different way -- but it won't get you ready for a road race.
Andrea Cespedes is a professionally trained chef who has focused studies in nutrition. With more than 20 years of experience in the fitness industry, she coaches cycling and running and teaches Pilates and yoga. She is an American Council on Exercise-certified personal trainer, RYT-200 and has degrees from Princeton and Columbia University.