Cardio's important, right? Problem is, my 2005 LifeFitness X3-5, no longer has any resistance (it's easy, regardless of level). As a DIYer, I've kinda taken the thing apart and see that the two obvious parts that need to do their thing (DC motor, and the magnetic brake) appear to be doing their thing - DC motor moves a cable to change the magnet position within the brake. But still nothing. 
Is there something else that might need some hittin' with a big hammer? Anyone have to deal with this at all? Thanks for your help!
Is there something else that might need some hittin' with a big hammer? Anyone have to deal with this at all? Thanks for your help!