When astronauts spend
extended periods of time in space, many surprising and sometimes harmful changes can occur in their bodies.
One such health concern is
a loss in bone density and bone strength due to the effects of microgravity and, to a lesser extent, radiation exposure.
A new study suggests that
astronauts and mission planners could employ an effective weapon in the fight against bone-density loss
Out of the 17 astronauts
who participated in the new study only eight regained full bone mass density one year after returning from a flight.
Bone density loss was
found to be much higher in astronauts who flew on missions longer than six months.
But the researchers also found
that astronauts who engaged in resistance-based training while in space were able to recover bone mineral density after they returned.