A video showing how people used to walk in medieval times has hit the internet and it makes for strangely compelling viewing.
A German expert in biomechanics offers an interesting explanation of how our way of walking has changed since the widespread introduction of shoes.
Before structured shoes were introduced, around the 16th century for most countries, people's gait was very different.
As the video demonstrates, in the middle ages, people pushed on to the balls of their feet instead of rocking forward. It was apparently a much healthier way of walking.
The video was published online by Roland Warzecha and has been viewed more than 500,000 times in the last month.