They’re among the most studied individuals on the planet, so unique in their circumstances that an exclusive branch of medicine has been devoted to them, indeed a new subcategory of physiology itself. Their experiences teach us about the fine delineations of human biology – as well as its inherent vulnerability. I’m talking about astronauts, whose explorations on behalf of humanity take them far beyond the landscape of earth and the natural conditions of human life. We read about their pioneering endeavors. We see the spectacular images, possible because of their labors. Yet, we know little of their experiences and the physical struggles they endure in the name of discovery.

To us, they might seem the epitome of vitality and enthusiasm as they wave their greetings from space or upon return from their voyages. Truly, these men and women must love what they do. They must value the extraordinary work of space […]

Original post by Mark Sisson

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Filed under: Fitness