It might be difficult to stay active, especially if you have to sit at your desk for long periods of time. If only there was a way to get a brief workout in without having to get out of bed. There is, thankfully, a solution in the form of a tiny exercise bike. It's essentially an exercise bike sans the handlebars or seat. It's small enough to fit beneath your desk, table, or at the foot of your couch, and it's easy to reach with your feet even while seated.