For Cowboys wide receiver Dwayne Harris, the world is his training ground. Harris, who checked into camp this year down about nine pounds from a year ago, told ESPN Dallas his trick was just chasing random animals.

"I'd just go out, man, and look for stuff to run after," Harris told the website. "All kinds of stuff. Rabbits. Cats. Everything. Especially when I was back at home with my mom [in Stone Mountain, Ga.]. We live in the woods, so there was a lot of stuff running out there."

He also chased after his dog, Polo.

"I'd chase after him because he doesn't want to come home," Harris said.

Harris, who averaged 13.1 receiving yards last season, also said he ate better.