Participants will do everything lying down  All activities – including food , take a shower and go to the bathroom – must be performed while lying down
Each participant has his own room and stays in a 6 ° inclined bed with his head down.
A Team The Nutritionist will curate the meals so that the participants do not gain weight and have all the nutrients they need. However, the German Aerospace Center (DLR) says on its website that meals are not "particularly healthy" and sometimes there are pancakes or other sweet treats.
The study consists of two rounds. The first group of 24 test takers – 12 men and 12 women – started on Tuesday. It is not yet clear how many participants will be needed for the next round, which will be held from September to December 2019 at the Cologne Institute for Aerospace Medicine of the German Aerospace Center.
Scientists look for healthy women between the ages of 24 and 55 who are non-smokers to participate in the study, it says on the study's website. The participants must be able to speak German.