Jspear said:
It simulates road gradients, drafting,
wind....
Not unless there's a massive fan attached. Even then, it still wouldn't count unless the bike was on rollers.
The miles most definitely count - especially when it's just a supplement to your normal outside riding.
I suppose this comes down to how we're defining "count."
I own a CycleOps Jet Fluid Pro myself, so I'm not unfamiliar with the concept. Nor am I suggesting that you can't get a serious burn on a trainer, and get some very useful physical benefits.
But the OP is trying to settle a debate amongst friends as to whether or not indoor "miles" should be given the same status as real miles accumulated on the road. In my opinion, they shouldn't, for all the reasons I've stated previously.
To look at this from another angle:
I abhor running on a treadmill, but I have done it for brief periods during harsh winter weather when a commercial gym was part of my routine. But I would never, ever count the time on a treadmill as "miles run" for the week or month, no matter how strenuous the work out.
When one considers "miles ridden in a year" there is an implicit consideration of all that that entails—varying weather conditions, inopportune flats and other maintenance issues, perhaps getting lost, having to suffer to make it back home when the ride doesn't go well, and possibly dealing with injuries sustained from anything from crashes to dog bites. None of those issues will be confronted by the basement warrior on a trainer.
To state the obvious:
The virtual world is not the real world.
Would a pilot count their time in a flight simulator as "miles flown"? I hope not, even though at the highest level of virtual training (military, commercial and NASA) they can be subjected to many of the same stresses as they may encounter in the real world. It is not, however, the real world.
I know plenty of people who push themselves to their limits (or so they say) while attending indoor "spin" classes (the instructor is really tough. He/she does IRONMANS!!!). But these same people are easily annihilated on the open road on an actual bicycle. Therefore, to me, they are not the same, and shouldn't be considered as such.