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How Space Exploration Affects Astronauts’ Muscles
The benefits of exercise are well known.
Exercise relieves stress, burns fat, and keeps
our heart and muscles strong.
There are about 640 muscles in the human body.
Each muscle needs to be used to stay in shape.
The phrase, 'use it or lose it' is even more
relevant in the space environment.
Exposure to reduced gravity during space
exploration causes muscle fibers to shrink
leaving astronauts weaker and less coordinated.
Without proper exercise, muscle size and
function could be reduced as much as 20-40%
during long duration missions.
Astronauts work out 2.5 hours per day
6 days a week, to counter the effects
of space flight.
Reduced gravity can impact an astronaut’s
fine motor skills resulting in a reduction
in hand eye coordination and balance.
If this happens in conjunction with muscle
weakness, it could make it hard for them to
complete their mission objectives.
Resistive exercise - like pushing or pulling
against resistance and optimal nutrition
reduce the negative effects of space flight
on muscle fibers.
Future extended trips to destinations like Mars
or other locations in our solar system will
require us to find even more effective ways
to keep astronauts healthy.
In looking for these answers,
NASA will undoubtedly find ways to help us
lead healthier lives here on Earth.