Scott Kelly says he didn’t feel normal until 8 months after he returned from the International Space Station.
Scott Kelly, right, stands behind glass in a quarantine room behind his brother, Mark Kelly, also an astronaut, after nearly a year in space. By Joel Achenbach Joel Achenbach Reporter covering science and politics Email Bio April 11 at 2:00 PM Astronaut Scott Kelly made himself a guinea pig for all the people who dream of human journeys to Mars and other destinations in space.
The researchers, echoing what NASA has suggested previously, said the twins study turned up no showstoppers — no shocking health consequences that would surely prevent a human mission to Mars or similar long-duration mission. But the report shows anew that the human body is adapted for life on the surface of Earth and goes haywire in zero gravity.
Months later, he still showed a slightly elevated number of cells with shortened telomeres, possibly an effect of radiation exposure. “He might be at some increased risk for cardiovascular disease or some types of cancer,” said Susan M. Bailey, a biologist at Colorado State University who led one of the investigations in the study.
But in an interview with The Washington Post, Scott Kelly, now 55, said that after landing he suffered flulike symptoms and felt bad for many weeks, and that altered his cognitive performance. “When first up there, I felt crappy because of the fluid shift and the carbon dioxide levels. I can’t say I felt a change in my immune system, but I definitely felt not well. But I felt much worse coming back,” he told The Post. “The most worrisome symptoms I had, which was swelling in my legs, the rashes, were gone after a couple of weeks. After a month I felt mostly better. I would say it took eight months before I felt completely back to normal.
“The study sample is two people,” Feinberg said. “If you see a difference between these two people, how do you know if what you’re looking at is because of the twin on the ground or the twin in space?”
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