Question

why were the cosmonauts made to sleep with their heads lower than their feet​

Answer 1

The one thing that cosmonauts are trained most to cope with is zero gravity. For example, Sharma, who recently gave a lecture in Bangalore on the kind of training that is given to astronauts, recalled that they were all made to sleep with their heads lower than their feet.Sharma says that six months before the launch, he dropped the fitness regime that the other cosmonauts were following and did intensive yoga. This was to assess whether yoga helps people cope better with the lack of gravity.