It's entirely possible. I've had asthma problems this year and have been outside riding only five times..all dismal failures resulting in coughing and chest pains the next day. I have a Kurt Kinetic road trainer and have put 4500 miles on this year. I bought a rolling work stand from one of those freight companies. I screwed a piece of lumber to the top and raised it up to the highest level. It fits nicely over the handlebars. Although I don't use it for reading I do keep a keyboard and mouse on it and surf the internet looking for cycle racing videos. That said I would think trying to write might be difficult.
Rich
__________________
..life is like a roll of toilet paper. The closer it gets to the end, the faster it goes. ― Andy Rooney ...enjoy what's left!