If you jogged for fitness, I would suggest a nice, conservatively-fitted road bike. A lot more fun to ride, and it may actually be more comfortable if the saddle isn't too high and the handlebars too low. There are many models nowadays from which you can pick a frame that is larger than what racer-oriented formulas will suggest, and they can be setup very nicely - and more aggressively later on if you want to go that way. Why ride heavier and pokier if you don't have to, especially if you want to say fit or improve fitness.