The mice infected with the space - grown germs had a mortality rate almost three times higher than that of mice given germs grown in normal gravity. (discovermagazine.com)
The body does less work in zero gravity, and returning to normal gravity strains muscles, hearts and the whole cardiovascular system. (discovermagazine.com)
The forces produced are equivalent to standing up in about two and a half times normal gravity. (scientificamerican.com)