Inside workout time increased by 50% when pushed to outside?

Using Train Now (great feature) I decided to look for a 1:15 endurance workout, and decided on Whorl. When I set it to outside, it showed as 1:52, just a hair under 50% more time. Hs anyone else experienced this big a change in taking a workout from inside to outside?

A post was merged into an existing topic: Duration Different From Indoor to Outdoor Workout