One of the success stories from applied health research on the International Space Station (ISS)—and the space shuttle before it—is the understanding medical science has gained in counteracting the effects of microgravity on the human body. Astronauts who spend months on the orbiting outpost devote a great amount of time to staying fit, using the treadmill and other equipment in the Tranquility Node for as much as 2 hr. a day to replicate the effects on their muscles and bones of ...


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