For many of us, our knees aren't what they used to be. And high-intensity workouts often seem like a recipe for joint strain. That's why it's important to find low-impact exercise gear that's gentle on your joints while still giving you a good workout. And we're here to help you on your search.

Under-desk elliptical machines have gotten extremely popular in recent years. And for good reason: They provide a low-impact exercise option to minimize stress on your joints, and they're small enough to slip under your desk so you can get a workout in while you work.