See what pops up today on the BBC site: http://news.bbc.co.uk/1/hi/sci/tech/6990319.stm
"And what this means is that muscles are attached to bones by tendons at the end and these tendons are big springs that store energy."
"If we make a model without tendons, it turns out that it's rubbish.
"It can't go very fast and it uses an awful lot of food to get from A to B. So you really can't run if you don't have tendons. If you do have tendons you can run a lot faster and you do it for less fuel."
One of the key points of ging.