50 Shades inspired aerobics

A New York fitness expert is running workout classes based on steamy bestseller 50 Shades of Grey.

Kristen James says her '50 Shapes of Grey' classes can help people act out scenes in EL James' erotic novels, reports the New York Daily News.

It features 13 'sexercises' including 'bend-over-better', 'sexy scissors' and 'seductive squat', all of which Ms James claims will translate to better, bolder sex.

She says the workouts will make people lean and strong, and give them the self-confidence to act out their fantasies.

"It's for any level of fitness," she told the Huffington Post. "It doesn't matter whether you're a conditioned athlete or beginner the workout is for everyone."