I still love and respect running as a competitive sport, but am now convinced that recreational running after one's competitive career is over is a misinvestment of one's phsyical life. My running career was ruined by injuries several years ago and I was very depressed for a long time afterward, because running was the only kind of athletic activity I knew or cared for, and was the world that I had lived in for so many years. But a year ago I took up bodybuilding and have come to realize that this is what I should have been doing all along; I look and feel far better than I ever did or could have while I was running, enjoy the training as much as I enjoyed running and find that it is far more compatible with the rest of my life than running was. I do one HARD full body workout every 4-7 days and do no cardio or other structured exercise apart from that. I am lean, muscular, fit enough to do any activity that I am likely to encounter in life, and all-around physically healthier than I was as a runner. I look so much better and feel so much better as a result. I don't get the endorphins that I used to get from running, but I don't need them anymore. I don't have to use running as an antidepressant because my mind is in order now. I think people continue running recreationally because they get absorbed into the world of running and they don't want to let go; well, I still go to track meets, read T&FN, visit all the running websites, etc. and that allows me to keep in touch with the sport that I love, but I don't have a pathological compulsion to run anymore, and am better off as a result.