NORFOLK, Va., June 29 -- Old Dominion University issued the following news release:

The Tour de France is getting faster. But why?

Every summer, cyclists shave time off their climbs by increasing race speeds and finding new ways to push the limits of human performance.

Researchers at Old Dominion University want to know what's behind it. Using 40 years of race data, a team led by Patrick Wilson, Ph.D., associate professor in exercise science, and Ross Gore, Ph.D., research associate professor at the Virginia Modeling, Analysis and Simulation Center (VMASC), analyzed how the world's most demanding cycling event - and everything surrounding it - has evolved, and what that could reveal about the future limits of human endurance.

Nicole Kni...