Originally Posted by
genejockey
I managed to do 47% of a century on Zwift. It wasn't too bad, but I used getting a route badge for a tough route* as the incentive. It wasn't horrible, but it was a long time in the garage. I had to make sure I got out of the saddle periodically, whether the terrain required it or not.
*(The Pretzel, which combined all the climbs in Watopia at an earlier stage of the game, so no Alpe du Zwift, but it does include the Epic KOM from both sides as well as the Radio Tower once).
I think I once spent two hours minus pee breaks on the trainer and I've been doing a 90 min group ride once a week or so, which I find hard enough. I couldn't conceive of doing a century unless maybe it was laid back enough to listen to the most fascinating audio book ever produced.
Of course, you don't see me doing many outdoor centuries either.