Some treadmills fold up for storage, making them a good choice for those with limited space. Treadmills run the gamut in price range, and can usually fit in any budget, but in most cases you get what you pay for and a very inexpensive model may not be a good choice for those who want to burn calories and get a good cardio workout with reduced impact to knees and hips. Stepping height can be adjusted to accommodate different body sizes and fitness levels, however, it can be used to perform a very effective ab exercise. The Roman Chair is a somewhat taller machine with two stationary, parallel arms and a straight, padded back. There is nothing to sit on. When you consider buying exercise equipment finances are on the brain for sure. The reason for this is that exercise equipment can be found online from many sources--check consumer reports and online shopping sites to find the absolutely most wonderful cardio exercise equipment you want is online at great prices--and there is so much to choose