The citizens of Japan who are interested in losing weight are putting on the new underwear which claims to burn hundreds of calories a week, just by wearing them.

The pants are made out with non-elasticated material which the company claims it will make it more difficult for your muscles to walk or climb stairs.

According to the Tokyo-based Goldwin company, they have claimed that a 140lb man who walks 90 minutes a day with the underwear one will lose 210 kilo-calories a week

These underpants are selling for £23.52 (Y2,940) in Japan. The secret is a resin which is printed on the frabic to increase tension.

“The Calorie Shaper Pant technology focuses on the hipline which is the area used by people when walking and climbing stairs. The material here is non-expandable which means they must use their muscles more.”

The underwear is the latest in a string of innovative products designed to help Japan’s workforce stem a surge in the overweight.