One of the most grueling of all bicycle races is the Tour De France. A contestant in that event, Gilbert Duclos-Lassalle, describes it in a National Geographic article titled, "An Annual Madness.? The race covers about 2000 miles, including some of France's most difficult, mountainous terrain. Eating and drinking is done on the run. And there are extremes of heat and cold. To train for the event, Lassalle rides his bicycle 22,000 miles a year. What kind of prize makes people endure so much hardship and pain! $10,000? $100,000? No. It's just a special winner's jersey. What then motivates the contestants? Lassalle sums it up: "Why, to sweep through the Arc de Triomphe on the last day. To be able to say you finished the Tour de France.?