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Walking on all fours: campus crawlers spark China-wide fitness craze as 4 million tap into primal movement fad online

People across China are engaging in a strange form of exercise which is turning human evolutionary theory on its head - walking on all fours.

The craze - which has spread like wildfire with the help of social media - was born when a group of university students in Beijing were caught on camera crawling around in circles in a playground last week.

The country-wide spread of people walking on all fours has been inspired by the movement of animals like cats, crocodiles and bears.

However, the growing number of people doing or taking an interest in it, are tapping into a deeply primal form of human movement, and the return to a time before we walked upright is not only fun, it is good for your health.

The primal movement workout took social media by storm and soon spread to other universities in the capital city.

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