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Scientific - Study: Muscle loss will be space problem
شنبه 6 شهریور 1389

Study: Muscle loss will be space problem

   نوشته شده توسط: فریده جلیلوند    

 

 

Study: Muscle loss will be space problem

 

MILWAUKEE (UPI) -- Astronauts' muscles waste away in the zero gravity of long space missions, U.S. researchers say, reducing their strength by up to 40 percent

This is the equivalent of a 30- to 50-year-old crew member's muscles weakening to those of an 80-year-old, an online article in the Journal of Physiology reports

This would pose a pose a significant safety risk for future manned missions to Mars and elsewhere, a study says

NASA estimates for a Mars mission it would take a crew 10 months to reach the planet, with a one-year stay, or a total mission time of about three years

Researchers at Marquette University say astronauts on such a mission would find their ability to work declining, with the loss in the most affected muscles, such as the calves, approaching 50 percent

The study -- the first on the effects of long duration space flight on human muscle -- took calf biopsies of nine astronauts and cosmonauts before and immediately following 180 days on the International Space Station

The findings show substantial loss of fiber mass, force and power in this muscle group

The results show the need for better exercise countermeasures on the ISS before embarking on distant space journeys, researchers say

But scientists shouldn't give up on extended space travel, the study's lead author says

"Manned missions to Mars represent the next frontier, as the Western Hemisphere of our planet was 800 years ago," Robert Fitts, professor of biological sciences at Marquette, said. "Without exploration we will stagnate and fail to advance our understanding of the universe

 

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