I just finished a 13.639km cycling that lasted about 0hh:53mm:32ss !
Oh my word, this was tiring. Using the Zwift game for the HUD information displaying cadence and power -- but the wattage feels WAY low. Maybe that's just how out of shape I am though.
Still getting used to the "virtualride" system they use. Kinda cool that they map out different part in real cities -- sorta. I dont think there's a giant glass skyway in central park in NYC....
Kinda sweet having a group digital ride w/ 
Check out some detailed info at my EXHAUST page
Join me in testing out EXHAUST!