Nathan's new set-up

Nathan has gone into the final phase of his training for the Around-the-Lake-Race (in NZ) in November. He has worked out a training schedule and put all this training times into our calendars, and keeps to them strictly.
But what do you do if it's already dark, or if it's raining too much outside?

You do this:

He has got a perfect set-up! With some new, very silent rollers - at home, in the AC in front of the TV!