Electronic Arts has become the latest game maker to target the Wii-as-personal-trainer market, USA Today reports. EA Sports Active, developed with experts including Oprah Winfrey's trainer, hits the shelves in March and aims to help users lose weight through more than 20 exercises that work the upper and lower body and boost cardio fitness. Nintendo remains the industry leader, selling 2.3 million versions of Wii Fit. (More Nintendo Wii stories.)