Lindsay Lohan faces an uncomfortable movie shoot after preparations for her latest role as a pole dancer left her covered in bruises. The actress has been taking striptease lessons from a professional ahead of filming I KNOW WHO KILLED ME, but is now regretting the hands-on research. In an email sent to friends Lohan moans, "So... three hours of pole dancing and bruised. Everywhere... I mean we're talkin' like, upper and inner thigh action-bruised... like a walking black-and-blue mark. "I mean really though, really, I didn't know it was actually possible to have bruises in such areas of the body. Strippers dude, I tell you, I really respect (them) now... I'm not gonna lie to you." Lohan's spokeswoman LESLIE SLOANE ZELNIK confirms to, "She's been in rehearsals for the film and has been taking classes. "Her character is a stripper, and she now realises that the job isn't easy. We should give these women credit." Lohan faces another five weeks of discomfort while she completes the movie.