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  • - When you get to space,

  • because you're in a zero G environment,

  • some really funky things happen to your body.

  • (upbeat music)

  • I grew an inch.

  • Right now, I'm 5'11" but in space I was six-feet tall.

  • On the ground, gravity compresses your spine,

  • it pulls you down, the force factor going down.

  • In space, without gravity pulling your spine down,

  • every vertebrae has a chance to move up,

  • which gives you your extra inch of height.

  • After my spine elongated,

  • when I went to bed on the first night,

  • I felt some back pain, some lower back pain,

  • and so I actually curled up to kind of alleviate that pain,

  • to kind of stretch it out even more.

  • A few other ways the body can change in space

  • are the heart gets smaller and changes shape

  • because it's not having to pump as hard to pull the blood up

  • from your feet,

  • 'cause now things are just floating and working

  • inside your body so it's pumping easier,

  • therefore the muscle walls actually changes the shape

  • and they get smaller.

  • Without gravity, your bones, they change shape

  • and they lose calcium, and they become more brittle.

  • So, we run on a treadmill that you strap yourself down to

  • and you run on the treadmill to actually give loads

  • into your bones to keep them from atrophying

  • and losing bone density or calcium.

  • For some people in space, your intracranial pressure

  • changes with pushes on your eyeball

  • and that changes its shape,

  • therefore requiring you to wear glasses in space,

  • so it effects your vision.

  • So, we keep different prescriptions of glasses

  • on board just in case someone's vision changes.

  • Any changes in our bodies

  • and anything that happens in space,

  • it's worth it for the spirit of exploration.

- When you get to space,

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B1 US GreatBigStory space spine gravity shape treadmill

This is What Outer Space Does to Your Body

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    許大善 posted on 2019/09/01
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