Astronauts could run round ‘Wall of Death’ to keep fit on moon, say scientists

Researchers suggest cylinder to prevent astronauts losing muscle mass in low gravity environment

As humans prepare to return to the moon after an absence of more than half a century, researchers have hit on a radical approach to keeping astronauts fit as they potter around the ball of rock.

To prevent lunar explorers from becoming weak and feeble in the low gravity environment, scientists suggest astronauts go for a run. But, this being space, it's not just any kind of run - researchers have advised astronauts run several times a day around a lunar Wall of Death".