I guess with off-road stuff you need a higher level of focus on riding. You can't take your eye off the trail and look at the tracker, or fuck around with twitter, etc. Must be more tiring, hour after hour - especially the descents.
I found it a lot easier to maintain focus which meant time passed much quicker. It was a real pleasure not being able to check your phone and just cycle.
I guess with off-road stuff you need a higher level of focus on riding. You can't take your eye off the trail and look at the tracker, or fuck around with twitter, etc. Must be more tiring, hour after hour - especially the descents.