Originally Posted by
MonsieurChrono
There are no HC climbs indoors, HC climbs come with change of altitude, temperature, wind, different posture on the bike (unless you tilt the bike or sth), and at times very bad road surface, among other things.
That's rather a "Captain Obvious" statement. No indoor ride will ever be the same as its matching outdoor ride.
But in my experience, an indoor ride is significantly harder than its outdoor counterpart, due to: uninterrupted resistance, more static position, higher sweat rate, less cooling.