Rob Kardashian: I Got a Leg Up on Fat (PHOTO)

Rob Kardashian is showing glimmers of a toned body, judging from what looks like some pretty muscular calves.

Rob arrived at LAX Monday and his body was almost entirely shrouded in workout gear, but there are certainly signs he's dumping the weight faster than his sister 86'd Kris Humphries.

Lookin' good.