This study reveals why astronauts should exercise in space
Nearly 50 years after man's first steps on the moon, researchers have discovered a way that may help astronauts spending prolonged time in space come back to Earth on a more stable footing. Up to two hours of endurance and resistance exercises daily during a long space flight mission, combined with IV fluid replacement after landing, help astronauts prevent dizziness and fainting during normal activity when they return to Earth. Since all the astronauts participated in the exercise regimen and received a saline fluid infusion upon landing, researchers do not know the blood pressure stabilization would have occurred without those measures. For example, the exercise program our lab developed for the space program is already helping people with a fainting condition known as postural orthostatic tachycardia syndrome," Levine said.
Exercise in space keeps astronauts from fainting when they return to Earth, study says
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