Got on a borrowed mtb 7 years ago to get in shape for a hunting trip in CO. Second best thing I've done in my 71 years. For reasons unknown, cycling just took. Thousands of miles later, touring and local, still going strong.

For me, it's mental therapy. Something about exercise induced endorphins and the zen of repetitive motion. Like others, a day or two off the bike increases my stress level. I get antsy. And yeah, I too like the feeling of accomplishment.

For us all, it's physical therapy. Any regular exercise helps control lipids, burns unneeded cals, builds endurance, induces the heart to develop collateral circulation, etc, etc. If there is any down side to cycling, I've not heard about it.

For 7 years, there's been another tour in the works. The people, the scenery, the friendships, the camping. The good, the bad, the ugly. Lord, it's all good. I'm addicted.