A group of mathematicians at Cambridge calculated that actress Jessica Alba’s sexy sway can be attributed to her hip-to-waist ratio, the U.K.'s Telegraph reported.

The academics say this calculation causes the strut in a woman’s walk, with 0.7 being the ideal ratio, providing the correct torso strength to produce a more angular swing and bounce.

Click here to read the story and see a picture in the Telegraph.

Therefore, a woman with a 25-inch waist and 36-inch hips would have the exact proportions to carry off a sexy sway.