Blac Chyna and Rob Kardashian: Getting Sweaty Together

Rob Kardashian and Blac Chyna have been getting hot and heavy in more ways than one.

Sources close to the unexpected couple tell TMZ, Chyna has been a positive influence on Rob because she’s helping him get back in shape.

But don’t get it twisted … we’re told they’re definitely more than just workout buddies — the romantic relationship is fairly recent, and things are more playful than serious. Read more at TMZ…