It's hard to beat cycling if you are looking for an enjoyable and healthy aerobic activity, but the quality of the aerobic bike you use will have an impact on how enjoyable the activity truly is. When choosing an aerobic bike, you will first need to decide if you intend to ride indoors, outdoors, or both. There are options for all three, but you will also need to consider your purchase budget, as the options can range in price fairly significantly. Generally, the term "aerobic bike" refers to indoor units only, though some do consider outdoor bikes to be a part of this category as well. The least expensive option is likely to be a low-end indoor bike; the most expensive option will be a road bike that can be ridden outside and then attached to a trainer indoors.
If you just want to ride your aerobic bike indoors, you can buy a stationary model that has a sturdy frame and resistance units rather than wheels. Some bike models will also have wheels, but such wheels will not come in contact with the ground and will feature some sort of resistance unit to adjust how difficult it is for you to pedal. Look for an aerobic bike with controls that are easy to use, particularly resistance controls. The bike's handlebars and seat should be adjustable for optimum comfort and safety as well.
Look for an indoor aerobic bike that features a computer with various features that are easy to use. Calorie counters, stopwatches, interval indicators, and heart rate monitors are all common features on aerobic bike computers. Some computers can be programmed to automatically adjust the resistance level during the workout; this allows you to tailor the difficulty of your workout and get the most from muscle building or aerobic conditioning.
Bikes with sturdy metal frames are best. Plastic frames should be avoided if possible, though not all plastic components are necessarily bad. The base itself will support the bulk of the unit's weight, so it should be sturdy and strong. Plastic panels may be included to cover internal components and to improve the aesthetic of the machine, but in general, metal components are better because they are more durable.
Try to find a bike that allows you to instal your own pedals or your own seat. This will help you improve the comfort and usability of the unit should you find a seat that is more comfortable to you, or pedals that work in conjunction with cycling shoes.
