For me, any indoor ride longer than ~45 minutes is soul-crushing. And that's with Zwift involved. Staring into space while trying to maintain a set power/cadence is just masochistic.
I did a 45-mile route on Zwift once (The Pretzel) which took about 2.5 hours, and the soreness afterward was... unpleasant. I like riding the trainer so much I took up walking/jogging/running.
I'd rather go for a run in the rain than bolt up the trainer. Which I have. And will again.
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