French astronaut Sophie Adenaud has returned to Earth after spending 237 days in space, but she is facing physical challenges as she readapts to life on Earth. Medical reports indicate that her body is having difficulty adjusting to Earth's gravity after prolonged exposure to the microgravity environment of space, which affects several systems, including the bones, muscles, and cardiovascular system. Dr. Roger Rua, a general practitioner and sports physician, explained that the human body is not built to function in microgravity, where the lack of weight reduces the stimulation needed for bones to remain strong. On Earth, bones are kept healthy through weight-bearing activities such as walking or running, which are not possible in the weightless conditions of space. To help counteract these effects, astronauts are required to exercise for over two hours each day, including activities that simulate the impact of such exercises. Despite these efforts, astronauts like Adenaud still face challenges upon returning to Earth. She is currently receiving medical care at a specialized center in Germany for a period of 15 days to three weeks. She is experiencing symptoms such as dizziness and constipation, which are known to occur after long stays in space. While Adenaud is described as a highly trained athlete, the transition back to Earth's gravity is still difficult and can vary from person to person. Dr. Rua noted that most astronauts regain their physical functions within a few weeks or months, as experienced by former astronaut Thomas Pasquier. The data collected from this mission will be studied to improve medical protocols for future long-duration space missions, including potential journeys to Mars.