Totally agree with this. You get out of anything what you put in, including work on a stationary bike. This is also why I try to preach quality on the Trainer if you go that route. You honestly do not need to be spending inordinate amount of time spinning mindlessly away, but if you do workouts with quality (see Jr's posts for examples or ask and I'll shed light), you'll get strong AND fast. And the same is true for stationary or any other peice of equipment.<br><br>
With that said, if you're number one goal is to kick ass all across the land, get yourself a Trainer and do core workouts there. If your goal is to stay in shape, keep the waist trim, and perhaps get faster -- but not in a crazy sort of way -- you're doing just fine.