Oversized bags can be very cool, but they're very heavy and really rotten to your back…your shoulder…your neck. O asked chiropractor Isis M. Medina to weigh in on how to shop strategically, carry safely and still look enormously chic.

Backs are her business. Isis, a New York-based chiropractor, specializes in keeping the spine properly aligned; she's also something of a style maven, which made her the ideal person to tell us how to buy a bag that's both good-looking and therapeutic.

How to find a handbag that won't hurt your back