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[ Music ]

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>> Karen Nyberg: Hi, welcome to
the International Space Station.

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As all of my family
and friends know,

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I love to run when I'm on earth.

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Luckily we have the
capability to run here

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on the Space Station too.

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In fact, it's one of the
3 exercises that we do

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on a daily basis to help
keep our hearts and our bones

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and our muscles strong
while we're here

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without the gravity pull

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of earth affecting our
body every single day.

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So let me show you
how we do it here.

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This is our treadmill
and it's called T2.

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It's located in node 3 on the
International Space Station.

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You'll notice that the
treadmill can move.

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It's on a vibration
isolation system like all

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of our exercise equipment is.

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And the reason is because there
are a lot of loads when you run

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on a treadmill and we really
don't want to impart those loads

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onto the Space Station.

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So we have all of our
exercise equipment

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on vibration isolation systems.

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Obviously in space, we
need something to keep us

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on the ground when
we're running.

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What we use is a harness
which is very much

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like a backpacking harness
and the straps are adjusted

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so that the load is
evenly distributed

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between your shoulders
and your hips just

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as if you were backpacking.

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We attach by these rings
the harness to a system

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of hooks and bungee cords.

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As you can see there's some
stretch in the bungee cord

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and then we can adjust

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and change the number
of hooks that we use.

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Today I'm going to use 4 hooks.

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If I were to use 3 hooks it
would ride a little more load.

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If I used 5 hooks it would
be a little less load.

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And then in that way we can
adjust the amount of load

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on our body as we're running.

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The T2 is controlled
by our laptop

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in front of the treadmill.

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And once I'm all
strapped in I can go ahead

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and select a protocol.

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Our trainers on the ground
get protocols assigned

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for us that we can use.

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Load up the protocol.

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This is an interval
protocol that I can do.

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And now you can see that
there's a target load.

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The target that the --

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my trainers wanted me to
reach was 100 pound load.

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There are load cells
in the treadmill

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and that's how it determining.

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And you can see with the 4 hooks
that I put on it's pretty close

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to what the target load is.

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[ Background sounds ]

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Click okay.

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And then I'm ready to run.

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See we also have
heart rate on display.

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We wear heart rate
monitors and this is when --

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once I push start the
treadmill belt will start moving

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and I'll just follow
the protocol.

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[ Music ]

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That was a great run.

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Not quite the same as being out
in the fresh air with the wind