Kristen James is an exercise professional in New York City, who is also a fan of the 50 Shades of Grey books. She claims that if you want to recreate the naughty scenes in the books, you need to be in pretty awesome physical shape to do it! So, naturally, she has created a 50 Shades of Grey workout to strengthen your core and help you have better, bolder sex. James claims that her workouts help participants lean out and build strength, as well as gain confidence. (DigitalSpy)

There are 13 exercises in total - including "bend-over-better", "sexy scissors" and "seductive squat"