Latest "fitness challenge" sees women showing off their flexibility by closing car boots with their legs

What happens when your hands are full but you need to close your car boot? Use your legs...if you are flexible enough, of course.

In the latest of bizarre trends spreading in China, women are showing off their flexibility by using their legs to close and open car boots.

This practically involves them doing splits in the air.

According to Shanghaiist, the craze was sparked by a video of a woman closing her car's trunk while holding a purse in one hand and a baby in her other.

Since then, several other women have attempted the same move and many are dubbing it the latest "fitness challenge".

Check them out in the video below.