There's swelling most of the time in the left knee. After a workout, it throbs for a couple of days. I went to the hotshot orthopedic surgeon who replaced the knees of a couple of my friends and close family. He ordered an MRI, and I went in yesterday to have him explain it to me: "Your knee is borked. You will need a total knee replacement."
I asked when, and he said that he'd like me to try to hold off a few years, because the service life on these things is only about 15-20 years for an average person getting them, of average weight, of average physical activity for a person receiving them... who are generally much older than me. I am well above average in most of those categories.
In the meantime, he wants me to use ibuprofen (which I'm responsive to) to keep the swelling down, and drop 50-100 lbs. (The last time that I was 100 lbs lighter, everyone asked if I had end-stage cancer or AIDS. I'm not going that light again for a LONG time.) 50 lbs would put me at about 242, which isn't a bad weight for me. Of course, running and walking to get my cardio are out, and he's not big on elipticals trainer machines, which I have been using. Maybe bicycling, and definitely swimming. There is a natatorium in the town next to my town, and annual passes are $125.
I'm looking at bicycles in the 22.5" frame size.
So, I've got some stuff to do, and a body fitness level to trice up.
Of course, that very evening, a "CPR In Progress" call came in. I drove quickly to get to the scene, out in the county. The mobile homes at the site were scattered with no rhyme or reason, and most were not marked. I got out of my cruiser, and ran to a house, which the residents declared to be a different address. Seeing the engine and the ambulance pull up and block my cruiser, I ran south, down the hill toward the next house 100 yards away, and upon finding that address on the porch (please post your address in very large, reflective numbers), I sprinted another 50 or so yards to the next house, and found the appropriate mobile home behind it. I ran in and made patient contact, bringing in the ambulance and fire guys. Once we had the patient buttoned-up in ambulance to go to hospital, a couple of firefighters laughed and said, "Dang, Matt G, we haven't ever seen you run like that before!" I let them know that it does happen, from time to time, though it was amusing that it should happen the same day that a fancy orthopedic surgeon told me not to.
The next morning, the knee was throbbing, some. Eh.
So, less food. More pushups. More coffee (obviously, because that's usually the best answer when you don't know what else to do). Less (I won't say "none at all") beer.
To paraphrase an internet friend of mine who is rapidly recovering from a hernia surgery with post-op infection: Getting fit isn't complicated; it is merely hard.