Two months flat on their backs revealed the shocking speed at which the human body surrenders to gravity's absence—and what that means for astronauts, the elderly, and anyone immobilized by illness.
Volunteers were paid about $19,000 each to spend 60 days in strict bed rest without once sitting up — and by the time they were allowed back on their feet, the control group had lost 48% of its calf strength, showing how quickly the human body begins to weaken when gravity stops making it work
Daniel Moran