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.
Breathing for the Sake of Science. 4K Video of Colorful Liquid in Space. Station Spacewalks to Replace Pump Module. Atlantis' Acrobats: One backflip and a dock to ISS. Conversations with Astronaut Karen Nyberg on... Family. Working Out Aboard the Space Station. Astronaut Chris Cassidy Shows Off Faulty Spacesuit (Part 1). Space Station Live: The Real Story of Returning to Earth. Astronaut Greets YouTube Space Lab Participants. Highlights of Science Launching on SpaceX CRS 18 - July 8, 2019.