Can this power be realistic?

[Snowie1]

One thing that hasn't been mentioned that I experienced when using rollers (and is just as applicable to a trainer that I have now). When you use a trainer/rollers you don't get to coast down hills and/or stop at lights etc.

Some people say that an hour on a trainer might feel like one and half on the road.

Not sure that helps, but you might find that the continuous effort is just harder than normal riding IRL.

[hamishm]

You can coast down the hills on the trainer. It just feels a bit silly just sitting there though.

[RobertL]

You can coast down the hills on the trainer. It just feels a bit silly just sitting there though.

I have heard of people coasting down Alpe de Zwift, and getting off the bike and going and making a sandwich or getting a drink.

[g-boaf]

You can coast down the hills on the trainer. It just feels a bit silly just sitting there though.

The fun of the real Alpe D'Huez is the descent and taking those corners - it's just awesome. On Zwift the descents are just silly. You either do nothing at all, or pedal like mad.

One thing that hasn't been mentioned that I experienced when using rollers (and is just as applicable to a trainer that I have now). When you use a trainer/rollers you don't get to coast down hills and/or stop at lights etc.

You can get coasting on trainers. You are thinking of ERG workouts instead of workouts with simulated gradients.