Robots train for world's first full marathon

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The four contestants of the world's first ever robot full marathon have joined a training session in Osaka, Japan.

Surrounded mainly by local press, the three diminutive two-legged androids and one wheeled unit dashed across the indoor circuit for a practice run.

When the real race kicks off on February 24th, the robots are due to run around the 100 metre course 422 times to complete a full 26.2 mile marathon.

Even if the robots are controlled by humans, the race will be a super-human feat as it may take them an estimated 4 days to complete it.

The robots, the tallest hardly 40 centimetres high, can be tweaked for repairs and their batteries can be changed but they will have to get up on their own if they fall over.

"You've got to stretch to prevent injuries and aim to complete the marathon," a robot called Robovie-PC told crowds gathered at the press event.

Japanese broadcaster TBS said the robots were all built either by Osaka Institute of Technology or a venture company called Vstone which specialises in robots.