My rough understanding is that it's a very strange environment for the body to be in for an extended period of time, and when you come back, gravity hits you ve

My rough understanding is that it's a very strange environment for the body to be in for an extended period of time, and when you come back, gravity hits you very, very hard. It seems like they all absolutely would need to have detailed tests when they come back. Whether there was another illness or emergency who knows. But the shock of sudden gravity could trigger things. I think this type of headline just gets views because people want to believe they made alien contact or something ridiculous.