If you are looking for an effective exercise bike that is safe to use and that there is as little chance of causing injury to yourself with, then you might want to consider something like Recumbent Exercise Bikes because they are known to be very effective.  If you have been into a gym at anytime within the last 5 years you will have noticed that these bikes are getting more and more popular.  Do you know what that is?  Well it is simply because it can give a beginner a stead workout and it can also give an advance user an intense workout as well.