When I started smoking I had already given up cycling for cars and girls (when I was a teen). In the following 35 years I never again rode a bicycle, drank and smoked (heavily) daily, did literally no exercise other than walking around the pits at the drag strip, and wound up becoming a gelatinous middle aged health risk with shoes. I quit smoking cold turkey (using Nicoderm which worked perfectly for me) this past New Years day. Within a month I noticed that I no longer coughed my lungs up every morning. Inside another month I noticed that stairs had gotten easier even though I had gained almost 20 lbs since I quit. I kept feeling better and better, and finally it got to where I couldn't sit still. At that point I started walking every day, at first a mile (and even that was in half miles sections so my legs could catch up), and then 2 miles, and then 2 miles straight through at as fast a pace as I could muster. Soon, I wasn't even breathing hard after 2 miles and my heart rate wasn't increasing enough to really do me much good. I can't run due to a knee injury, and walking farther daily was starting to become a time conflict for me considering the comparative lack of benefit.
That's when I rediscovered cycling and bought a Trek DS hybrid and started riding the local rail trails. Much like walking, at first I couldn't go very far without an occasional short rest for my legs, especially on even the slightest uphill grade. Now, only a month and a half after starting riding, I'm going anywhere from 10 to 15 miles a day as time permits, and will certainly increase that when spring arrives. My legs still burn on hills, but my heart and lungs are keeping up just fine, and I find myself seeking out hills rather than trying to avoid them. For the first time in my life I crave exercise! I truly cannot believe how quickly my lungs recovered - 35 years of 1 to 2 packs a day (occasionally more if enough drinking was involved) has surely done plenty of damage, but I feel like I've never smoked at all! A friend gave me a recumbent exercise bike to keep my legs and heart going through the winter. Strength (weight) training is my next step, to begin this winter as soon as I can free up more of my schedule. I may even add road biking to the mix come spring...
My 20 lb weight gain from quitting has become a 40lb loss overall, 20 lbs less than when I quit smoking. My new found inner strength has me eating much more healthy foods and I have set a goal to lose another 60 lbs, no matter how long it takes. That would put me at my high school weight for the first time since, well, high school. I am now 51 and feel better than I did when I was 30!
I don't care how long a person smoked, they will be amazed at how quickly they recover when they quit. In my case, even if I get diagnosed with lung cancer 10 years for now, at least the coming ten years will have a higher quality of life than the last 35 did (at least in terms of health). I've already outlived at least a dozen of my non-smoking friends, so I am obviously lucky. Hopefully the big C word will never be added to my med history.