Treadmills are the most popular piece of cardio equipment, because they're versatile and a cinch to use and offer a calorie-incinerating workout.

Treadmills are a staple of gyms. They provide a safe, variable cardio workout you can do despite whatever weather is swirling outside. And how else can you run a few miles while chatting with your best gym buddy?

A range of treadmills are also available for home use. There are two basic types: those with motors and those without. Although they are more expensive, motorized treadmills are of higher quality. Good treadmills allow you to adjust both the speed and the incline of your workout and give you feedback on distance traveled, calories burned, pace and workout time.