Treadmills are the most popular piece of cardio equipment, because they're versatile and a cinch to use and offer a calorie-incinerating workout. A treadmill lets you work out on your own terms wherever and whenever you want. Studies have shown that people get more out of a treadmill than other fitness equipment, because it is natural to walk or run and you are more apt to stick with it.

Part stair climber, part treadmill, part stationary cycle, elliptical motion trainers are the hottest new aerobic machines. Elliptical trainers provide a good break from the pounding of other aerobic activities. Your legs travel both forward and backward in an elongated circular movement, and on some models, you pump poles back and forth for an upper-body workout.

Less expensive than other aerobic exercise machines, rowing machines are ideal for building stamina and improving cardiovascular health. Rowing machines focus heavily on your upper body, something even ellipticals fail to do, allowing you to make great gains and garnering the rowing machine a large highly devoted following of athlete's and fitness enthusiasts.

Exercise bikes have always been popular because they provide a good aerobic workout, yet don't require a lot of balance or coordination. Exercise bikes take up little space, are easy to move, are sturdy and require little maintenance.

A heart rate monitor senses and displays your heart rate. Walkers can use heart rate to adjust the intensity of their walk - speeding up or slowing down to stay in their chosen heart rate zone. Two walkers going the same speed may be in different zones - one barely working at all, the other near maximum and straining. As your fitness improves, you can walk faster at the same heart rate..

A pedometer senses your body motion and counts your footsteps. This count is converted into distance by knowing the length of your usual stride. Wearing a pedometer and recording your daily steps and distance is a great motivating tool. You can wear a pedometer all day, every day and record total steps. Or you can wear it just when you go out for a walking workout.

Sauna Suits are excellent for aerobic conditioning. Wear your sauna suit while exercise or play and it will seal in heat, helping your muscles stay warm and increasing the amount you will sweat. Also see our jump ropes for a great aerobic, fat burning workout.

Jump Ropes are an effective way to burn fat, increase stamina, improve coordination and firm muscles, especially your shoulders, arms and legs. It's a speedy calorie burner too: Jumping at a moderate speed of 70 to 120 turns per minute for 15 minutes burns 150 to 200 calories -- as much as running a ten minute mile, but with half the impact on your knees and ankles.