Originally Posted by eduskator

The word perceived is the key here. It does not feel the same, no, mainly because you're battling against an element. At least, not for the average joe. Different conditions means different perceived efforts. 300w at 30kph against a headwind does not feel the same as 300w at 40kph with a tailwind. One is fun, the other isn't. This is when and why mental resilience is key in endurance sport. The magic happens between your ears.