And, God forbid, they would need to be in excellent shape in an emergency so they could escape the danger as soon as possible.Īdditionally, once the astronauts return to Earth, their weakened muscles and bones would make carrying any weight painful.įor these reasons, NASA (as well as other space agencies) has worked diligently over the years to develop strategies and tools to support astronauts’ physical well-being. This results in a loss of size and strength, and because it weakens the astronauts, it may compromise their ability to carry out tasks in space. Why is it important? Without physical exercise, their bodies, sooner than later, will start losing both muscle and bone density. The muscles and bones of these daring space explorers begin to atrophy without the literal pull of earth’s gravity.Īstronauts need to exercise regularly to make up for this loss in bone and muscle mass. An astronaut might spend three to six months in space on average, depending on the mission. Astronauts have been launched into space by NASA for more than 50 years.Īs missions got more complicated and technology advanced, astronauts were spending more time in orbit.
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