Understanding the effects of space travel on the human body is crucial. We know that astronauts suffer from a loss of bone density, weakened muscles, reduced heart function, exposure to radiation, nutrition deficiencies and immune system problems as well as a loss of sleep and psychological problems.
Astronauts could be at risk of developing a range of health problems - including back problems, osteoporosis, cancer and damage to the nervous system. Identifying the most common health problems will be crucial.
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