Benefits

• Elliptical machine
  
  Standard elliptical machines have bars or handles attached to the upper half of the machine, allowing the user to practice a full body workout. Some stair steppers have a similar feature that allows the user a simultaneous upper-body workout, but since these bars are usually self-coordinated (unlike elliptical machine, whose bar movement is inherently tied to the pedal movement), some users may have difficulty with this option.
  
  Elliptical machines require significantly less impact than stair machines, making them ideal for older people or those who have suffered any lower-body injuries. Low-impact machines like ellipticals make it possible for people with arthritis or other physical conditions to continue an exercise regimen.
  
  

Features

• Heart rate monitors are often available on both elliptical and stair stepper machines, since knowing what your heart rate is helps to determine the ideal exertion for weight loss and muscle gain. Unless your exercise regimen is very casual or you've already got a good idea of what your ideal exercising exertion should be through another heart rate monitor, you'll probably be interested in finding a model that offers this feature.
  
  Other features that you may be interested in include adjustable resistance levels and workout programs. Both these features can help vary your workout and measure your progress by giving you new physical goals to strive toward.
  
  

Size

• One advantage of a stair stepper machine over an elliptical is the sizes available. For the occasional exerciser, or one who has only a small place for equipment, mini stair steppers offer many of the same basic benefits as a full-size stepper but can literally fit in your hands. This makes your exercise equipment both easy to store and easy to transport.
  
  Elliptical machines come in various sizes, but none of them could be considered travel-sized and even the smallest collapsible versions take up several feet even when folded up.
  
  

Considerations

• If possible, it's best to try out your elliptical or stair stepper yourself before you buy it. Some exercise equipment won't be comfortable to use, and that makes it less likely that you'll actually stick to an exercise regimen.
  
  Note the stability of the machine. Stair steppers and ellipticals that have a heavy base are the most likely to keep you feeling secure, especially during vigorous exercise. However, these types of machines are typically larger and less portable, so weigh your needs. Additionally, the noise of your stair stepper or elliptical machine can make a difference in your usage--if you plan on watching television or listening to music while you exercise, a very loud machine won't be helpful. On the other hand, machines tend to be loudest when going very fast, so if you're a beginner or light exerciser, the sound may never become a problem.
  
  

Expert Insight

• Look for stair steppers and ellipticals that have flat or self-leveling pedals. According to The American College of Sports Medicine, inclined pedals can lead to improper posture during your workout, causing aches and possible long-term negative effects.