Types
There are three types of elliptical trainers, categorized by the motor or "drive" location. The oldest elliptical design is the "rear drive" type. The "front-drive" elliptical was the second generation design. The latest design technology is the "center-drive".
On some models, the incline of sloping roller ramps beneath the pedal-links can be adjusted to produce varying pedal motion paths. The result of such adjustment changes the burdens on various muscle groups in the legs. Some models can vary the incline, resistance and stride length over the course of a workout according to a preset program. Some trainers can be driven in either a reverse or forward direction. Elliptical trainers are primarily driven via the legs, and most are combination designs having handle-levers attached to each pedal-link to enable a burden on the arms to provide a secondary source of driving power. The user grips the handles below shoulder height and pushes and pulls them while shuffling the feet back and forth within elliptically-shaped paths. Thus the oscillating handle motions are dependently coordinated with the constrained pedal motions. Poorly designed machines are too dependent on the user's leg power, producing excessive handle speeds due to mechanical ratios that do not provide enough advantage to the handle-levers. Consequently such machines feel to the user as if his or her arms are simply going along for the ride, rather than sharing in the work. The better models offer a harmonious combination of arm and leg exercise in the correct ratios.
Some manufacturers produce durable commercial models with extensive programs and made to withstand frequent use in a fitness club environment, at prices typically in excess of US$4,000. Models are available for home use at prices starting at about US$200.
Read more about this topic: Elliptical Trainer
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