But physical prowess can only take these cyclists so far. Willpower, tenacity, and a never-surrender attitude must also be in the successful racer's repertoire.
"The race throws too much at you," says Roll. "Anything can happen out in the road. The weather could be bad, the crowds can step in front of you, the food can be bad, you might not sleep because there are parties outside your hotel all night, you might crash on oil on the road, or you might be taken out by other riders that fall down."
Be Like Lance
You may feel like the most inactive person in the world, but it is possible to achieve your own Tour de France victory.
"Cycling is a great activity that can be performed by a wide variety of fitness levels, body types, and body sizes," says Cedric Bryant, PhD, chief exercise physiologist for the American Council on Exercise.
The benefits are just as generous. According to Bryant, biking can help burn calories, control body weight, and reduce stress, blood pressure, and risk of type 2 diabetes. It can also improve overall cardiovascular fitness, cholesterol levels, and immune function.
Not only that, there's the advantage of being outdoors in the sunlight and fresh air, having adequate cooling, and seeing different terrains and scenery.
And if you enjoy the sport, the pros multiply. "The best exercise that you can select is the one that you enjoy, because you're most likely to do that on a consistent basis," says Bryant. "Don't get caught up in 'Well, this one doesn't burn as many calories as the next one.' The most important thing to consider is, what type of activities do you really enjoy?"
Incidentally, a 150-pound cyclist pedaling a gentle pace of 12 miles per hour can work off 410 calories in an hour (about the same amount as a Quarter Pounder hamburger), says Patrick McCormick, a spokesman for the League of American Bicyclists.
Your own biking regimen, though, may pale compared to the 5,900 average calories burned per day in the Tour and may not work off as much as running. (An hour on the bike may burn about 400, while the same time on the treadmill may burn 700 calories.)