Go to the 50+ forum. A lot of those guys took up cycling seriously after 50 and it was a renaissance in their lives. I took up cycling again at around 37 and let it slip away. Fast forward to me being about 50 pounds overweight, very out of shape, and with knee joints so bad I could hardly walk.

At 54, last May, I took up cycling again (that's when I had two torn ligaments in my knees and could barely walk). Also took up weights, some running (I know it's not the best thing you can do with your knees), yoga/stretching, etc. Now, 40+ pounds lighter, I can do things I haven't been able to do for years. My knees are sturdier than they have been for over a decade. My upper body strength is good enough that I can outdo most much younger than me. My life is reenergized to the point where I am reborn.

My biggest regret is that I gave it up in my mid-30's. Then, I wouldn't have to go through all this crap just to restore myself. Never again!!!