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A heat map of popular exercise paths in Tokyo as measured by the Stava social network. Image: Strava

If you look at the data, Olympic marathoners train slower than they plan to run in competition. Most amateurs do the opposite, according to new data from workout tracker network Strava.

Why it matters: It's an example of the kind of information that can be gleaned by extensively tracking the country's workouts (with their consent).

A significant portion of Olympic runners and cyclists shared their routes and times on Strava, including a third of road cyclists as well as all three men's medalists: Richard Carapaz, Wout van Aert and Tadej Pogacar.

By the numbers:

  • 2 minutes, 9 seconds: The fastest public time on the 750 meter running route near Olympic Village, belonging to Mexican triathlete Crisanto Grajales Valencia.
  • 31 minutes, 9 seconds: The fastest public time around the 10-kilometer marathon loop, belonging to Dani Mateo.
  • 34 minutes, 8 seconds: The fastest public time for a woman around the Olympic Marathon Loop, belonging to marathon bronze medalist Molly Seidel.

Go deeper

DOJ sues American Airlines, JetBlue to block "unprecedented" alliance

Photo: Andrew Harrer/Bloomberg via Getty Images

The Justice Department on Tuesday sued American Airlines and JetBlue to block an "unprecedented series of agreements" that will consolidate the two airlines' operations in Boston and New York City.

Why it matters: The civil antitrust complaint alleges that the planned Northeast Alliance (NEA) "will cause hundreds of millions of dollars in harm to air passengers across the country through higher fares and reduced choice," the DOJ said in a release.

FBI: Body identified as Gabby Petito, death ruled a homicide

A memorial dedicated to Gabby Petito near City Hall in North Port, Fla. Photo: Octavio Jones/Getty Images

A body found in Teton County, Wyoming, on Sunday was confirmed to be the remains of missing 22-year-old blogger Gabby Petito, the FBI announced Tuesday.

Driving the news: The death was ruled a homicide by the Teton County coroner's office, the FBI said. The cause of death has not been determined.

Ben Geman, author of Generate
4 hours ago - Energy & Environment

China vows end to building coal-fired power plants abroad

Chinese President Xi Jinping. Photo: Mary Altaffer/Pool/Getty Images

Chinese President Xi Jinping told the UN General Assembly Tuesday that his country "will not build new coal-fired power projects abroad" and plans to boost support for clean energy in developing nations.

Why it matters: The pledge, if maintained, would mark a breakthrough in efforts to transition global power away from the most carbon-emitting fuel.