Duff Gonna Make You Sweat 'Til You Bleed

Posted Feb 14th 2008 11:22AM by TMZ Staff

TMZ's photog got a killer workout while trying to get a shot of Hilary Duff yesterday -- sprinting four blocks to get a shot of the Duffster on Rodeo Drive.

Running to the adorable Duff sure beats doing those Jane Fonda lifts.