Video from the 1950s
NASA astronaut Karen Nyberg, an Expedition 37 flight engineer aboard the International Space Station, demonstrates how astronauts run on the COLBERT treadmill in a weightless environment. Station crew members exercise for at least two hours every day to keep fit and to prevent the loss of muscle mass and bone density that occurs during long-duration spaceflight.
Launch at the 1 hour 50 minute mark.
