When it comes to cardio machines, not a lot of other design can hold up to a nice elliptical machine. It is able to give you a nice cardio workout while minimizing injury as it is able to minimize impact on the joints as well. So when you are the kind of person that does not have a lot of money to spend on fitness then maybe it would be best t consider getting yourself a nice used ellipticals set that way you will still get the exercise you need and not have a problem with your health in the long run. These days it is always good to be practical with money but like they also say, these days it is better to prevent that to medicate and exercise is part of a good preventive measure. Look at it as a savings from buying medication in the future if you get too unhealthy.