The most telling test in rehab is "the 6 minute walk". This is how the medical experts tell if you are more fit or less fit than you were the last time you did a 6 minute walk. If your distance decreases, this is cause for concern.
Although it means nothing to compare your distance with those of another patient, I am told that I have the Toronto General's record of 720m, although I am aware of several World Transplant Games Race Walking medallists do their tests at TGH, so this record is "unconfirmed" at best. During my assessment for lung transplant I did 313m, which was still quite a feat while lugging an oxygen tank back and forth down a busy 25m hospital hallway.
Since I have returned home, I have been doing my own 6 minute test on an almost daily basis. We have a great LeMond exercise bike at the gym where I work. It keeps data from every second that I'm on it. I have blasted this machine for 6 minutes as hard as I can 173 times over the past 2 years.
Yesterday in my fitness test, I put out the most wattage -- 174.683 watts per second average -- that I have ever produced. There were 18 times in those 173 workouts that my average heart rate was higher than it was yesterday.
What's this all tell me? Simply that I am the fittest I've ever been, according to this measure.