I'm looking to buy a (cheap) exercise bike, but i can't decide what would be better, the uprights or the recumbents (the ones where you sit back and pedal as opposed to lean forward and hold the grips). Also, if you have any suggestions as to which brands to get or NOT to get, that would be greatly appreciated. I'm looking to spend under $150, just a very basic bike, nothing fancy.
First off, recumbent bikes are best for those with back problems, or knee problems. Also, if you are severely overweight, you will find the seating more comfortable in a recumbent bike. As for better. Both will increase your cardiovascular fitness. At your price range, you will get a better workout from a standing bike, as it will be cable of working your muscles more. At the pro level, like you find in gyms, both can offer a challenging work out due to the computers on board and the way they adjust tension.
For training purposes, the upright is best. It forces you to use more muscle force to turn the pedals and you use your abs for support unlike the recombent bike. This is why if you have a lower back problem th esit down style is best.
At $150, you are getting a disposable piece of gear. I suggest looking at a local chain sports store in your area. Even discounters like Target and Walmart have these. Consider an extended warranty if its under $20.00. At about 300.00 they get sturdier and brand matters, but at this point, get a cheap one with the main features you want and see how it goes.