Elliptical trainers are aerobic fitness machines that require you to push your feet in an elliptical pattern to complete the exercise. As you move, you hold onto attached ski poles and pump your arms back and forth for an upper body workout. Brands of elliptical trainers include Sole, NordicTrack, Precor, Proform and Horizon Fitness. Trainers can be purchased at sporting goods stores or specialty fitness equipment retailers.
Popularity
The number of elliptical trainer users increased 65 percent from 2002 to 2003, according to Consumer Reports. In 2003, an estimated 3.3 million people in the United States worked out regularly on an elliptical trainer.
Calories Burned
You can burn a large number of calories using an elliptical trainer. According to the American Council on Exercise, you can burn an average of 8 to 9 calories per minute when using an elliptical trainer. This level of calorie expenditure is similar to high-intensity exercises such as running, cycling and aerobics. During a 30-minute session on an elliptical machine, you can burn 240 to 270 calories. Calorie burn levels vary depending on your speed and intensity level.
Features
Features of elliptical trainers include electronic programming, safety features and heart rate monitoring. The electronic programming tracks distance, calories burned, speed, time and resistance level during workouts. Safety features can include a pedal arm pin to protect children when the machine is not in use. Two types of heart rate monitors included on elliptical trainers are hand grip sensors and chest strap monitors that wirelessly transmit data.
Considerations
The type of poles used on the machine has a major effect on the effectiveness of the elliptical trainer. The poles should be easy to reach without requiring you to reach far forward. If you are leaning forward, you are putting unwanted stress on the back. When you ride, your shoulder should be back, chin up and your abs contracted. Your stride should be controlled and steady with a normal range of motion. An elliptical machine with narrow foot pedals offers a more natural stance than wide versions.



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