By Bob Markus

If the deaths of three runners in Sunday's Detroit Marathon proved anything, it might be that life is a crapshoot and sooner or later you're going to roll snake eyes. There seems to be no logical explanation for the sudden deaths of Daniel Langdon, 36, Rick Brown, 65, and Jon Fenlon, 26, all within a 16-minute span. All three were entered in the half marathon, just over 13 miles, a distance that, while daunting to your average couch potato, is not beyond the imagination of any reasonably fit runner. In my own running days I once ran 10 miles in Los Angeles' Griffith Park and felt I could go farther.

But 26.2 miles? On the face of it that has always appeared to me to be a sure sign of insanity. If it doesn't kill you, it will certainly wreak havoc on some of your body parts, in particular your knees. Actually, the chances of it killing you are minimal, statistically almost nonexistent. A marathoner is more likely to be hit by a car during a training run than drop dead during a race. But it happens. It happens to one in about 75,000 marathon runners. That doesn't include those who die during training, most notably Dr. Jim Fixx, who became a millionaire extolling the health benefits of running in three best-selling books, but succumbed to a heart attack, at 52, just after completing his daily run.

That running a Marathon may prove to be dangerous to your health was proved by the very first marathoner, a Greek named Pheidippides. Shortly before he won the Marathon gold medal at the 1972 Olympics in Munich, Frank Shorter was musing about the distance, precisely 26 miles and 385 yards. "The guy who invented the marathon got the distance just right," Shorter told me, "because he knew exactly how much the human body can stand." Actually Pheidippides might have been better off walking those final 385 yards. Because after blurting the glorious news of a major military victory at Marathon to the people of Athens, the swift soldier collapsed and died on the spot.

Shorter won that gold medal in only his fifth marathon. He was basically a middle distance runner, whose finishing kick was good, but not quite good enough . But in the Marathon, he said, there is no finishing kick. "It's a question of who's decelerating the least over the last six miles."

Even for a great champion like Shorter there was a price to be paid. "Pain? Sure there's a pain factor. But there's a pain factor in every race beyond 200 meters, but each race has its own kind of pain. Actually, you can't describe it unless you've done it." But why do it? Probably for the same reason you'd climb Mt. Everest or swim the English Channel. It's a challenge, but one that is more reachable than Everest's 29,000 foot summit or the vast expanse of ocean between Dover and Calais. I'm reasonably certain there is also at least a modicum of addiction involved. I can vouch for that from personal experience.

I came late to running, not starting until I was well into my 30s. I started after a routine visit to a new doctor, Dr. Smith, who listened to my heartbeat for a few seconds and asked me: "What are you taking?" I named a drug meant to revive a comatose thyroid and he advised, "You don't need those pills. Throw them away and start exercising." Until then, I had led a mostly sedentary life except for eight weeks of Army basic training more than a decade earlier. But inspired by Dr. Smith I set a goal of running a mile in 15 minutes. Serendipitously, I was scheduled to go on a two week assignment to the Kansas City Chiefs training camp in Liberty, Mo. The Chiefs, as Super bowl champions, were preparing to play the College All-Stars in the season opening exhibition game sponsored annually by my newspaper, the Chicago Tribune. It appeared to be the perfect opportunity to get myself in shape. Accordingly, on my first morning in camp, I arose early and went to the quarter mile dirt running track and set out to run my first mile. I had just finished my first lap, however, when a short, thick-set man jumped in front of me with his arms in the air.

"What are you trying to do," he asked me. When I told him, he said, "You're going about it the wrong way. Let me help you and I guarantee you'll run that mile." For the next 10 days, Alvin Roy, the Chiefs' strength coach, worked with me every morning. His training regimen consisted of lifting weights and interval running. At no time did he let me run more than one lap until the last day, when he took out his stop watch and sent me out for my final exam. I don't remember what my time was but it was under 10 minutes and I was satisfied with that. From then on, I was hooked on running. I usually ran three miles before breakfast. Often I would run with Andy McKenna, who was on the board of the Cubs, White Sox, and Bears, with whom he had a minority ownership stake. The White Sox were up for sale at the time and rumors were flying all over town, but with my morning runs with Andy I had a pretty good grasp of what was going on. It was especially neat to find good running trails on out of town assignments. I think of all the runs I've had, the one I enjoyed the most was at a park in Syracuse, N.Y. the morning of a Syracuse-Penn State football game. The run was through a woods on a carpet of autumn leaves with a lake on my right hand side. It was an exhilerating moment.

The beginning of the end came one morning in Laramie, Wyo. I had just finished my morning run and sat down on the bed to take off my socks when a jolt of pain shot through my left knee and almost dropped me to the floor. Several cortisone shots and an arthroscope later the knee felt better, but that didn't last. I kept breaking down. Either my knees would get sore or my back would go out and I finally figured somebody or some thing was trying to tell me something. Today both knees are shot through with arthritis and the pain is constant, though bearable. Oddly enough, the knees don't hurt as much when I walk so that's how I get my exercise now. But I do miss running and if you were to ask me: Knowing what you know now would you do it over again, I'd reply, Damned right.