Well, you don't have to be in such a good physical shape to get into one of those aircrafts that are going to be used by space turism companies such as virgin galactics, as they don't go through as much G force as rocket-boosted space shutles, they are launched by airplanes and simply climb up to a very high altitude, I don't think they technically even get out of the atmosphere, they don't even get into an orbit, they have zero gravity because the ship falls down for a while. Of course not everyone is apt and fit to do such a trip, for example I wouldn't recomend it to anyone with heart problems.

Me, I would never get into one of those things. I have a terrible fear of flying, I would never get into something that teorically goes into SPACE.