I don't believe that's his working desk at all, sorry.
Me neither. Even considering that with today's computers a large desk is not quite as nes.as it used to be. But that desk is tiny, his knees have nowhere to go, his chair is fabulous, but for a Health-sports-professional to be working there for more than an occassional paying of the bills and preparing a letter, this won't do.
The small desk is also IMO far too close to the wall.
In any way, I think they are very private and they simply pretend to be open and About.