Heidi Klum, AOL CEO Tim Armstrong Go For A Run (PHOTO)

"Project Runway" host Heidi Klum hosted a summer run in Central Park on Friday morning. While most efforts to stay fit are pretty admirable, this one was especially so, given the 100+ degree weather in New York.

The event was part of "Heidi Klum's Summer Run," an initiative that she started as part of her new AOL lifestyle site, "Heidi Klum on AOL," to encourage her fans to stay fit. Klum ran with 125 AOL employees, including AOL CEO Tim Armstrong. Klum posted more pictures on her website, where she wrote: "Just finished my run with Team AOL! My fitness expert David Kirsch and AOL CEO Tim Armstrong joined the run on this hot, humid and sweaty day."