In generally, the simplest equipment is the treadmill. While this tends to be a large piece of equipment before buying and avoid those that make claims that sound too good to be true - they probably are. Stationary bikes have been around for decades and have improved in design and function over the years. They have been proven to provide weight loss and health benefits if used consistently and correctly. They offer a good cardio workout as well, while limiting impact and injury to knees and hips. Stepping height can be adjusted to accommodate different body sizes and fitness levels, however, it can be easy to put too much stress on ankles and back when using a stair stepper. Both size and price are in the moderate range. The Ab Slider, Ab Wheel, and Ab Trainer are other examples of equipment designed to target abdominal muscles. As with most types of fitness equipment, their effectiveness often is dependant upon correct usage and, in some cases, combining them with other abdominal exercises. It is important to decide what it is you hope to accomplish. Are you trying