Watts are watts but generally RPE is higher inside because of heat stress (dunno the data but you'd need a fucking huge fan to replicate outside riding), the turbo lag effect (sorry Fast and Furious) as danb says and comfort, because you're often locked into a very static position and don't move around as much as you would on the road, which can cause issues on longer rides.
Watts are watts but generally RPE is higher inside because of heat stress (dunno the data but you'd need a fucking huge fan to replicate outside riding), the turbo lag effect (sorry Fast and Furious) as danb says and comfort, because you're often locked into a very static position and don't move around as much as you would on the road, which can cause issues on longer rides.