Questions regarding some winter training. I have a treadmill and like using it much more than my cheap-o bike trainer. The treadmill has variations for incline and speed, does a warm up / cool down for the different programs, etc.

I know it's not working all of the muscles that are used when riding on the road, but I like the aerobic workout I can get. I mix up the routine to keep things fresh, sometimes doing more speed and sometimes doing more incline with lower speeds.

How does this 'translate' to riding? Does the speed workout get more aerobic attention and the incline more muscular attention? How does each fit in with some aspect of riding (i.e., distance, speed, ability to climb, etc)?

Thanks!