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Originally Posted by Raf1394
Would be interesting to know the effects on your body, being 9 months in space.
They really have to investigate for the future. A human body is not made for being in space for a long time...
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Long term exposure in Space can have detrimental effects on the human body. Muscle growth and definition can atrophy and shrink in Space and confined areas. Connective tissue break down and there is a depletion of Bone mass.
It has been suggested that long term exposure to space travel can leave Space Traveler's with long term Health effects. Radiation exposure can result in detrimental effects as well.Prolonged exposure is linked to higher cancer risks and potential cognitive decline.
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- Body mass and fluids: Astronauts lose about 20 percent of their body fluids and about 5 percent of their body mass while in space.
- Muscle: Microgravity causes muscle atrophy, but exercise for two hours a day, six days a week and supplements can reduce muscle loss.
- Skin: Skin thins, tears easily and heals more slowly in space.
- Eyes: Microgravity impairs vision while radiation increases cataract risk.
- DNA: Most genes reset after returning to Earth, but about 7 percent remain disrupted.
- Psychosomatics and cognition: Radiation may cause brain damage and the onset of Alzheimer’s disease. Space disrupts orientation, causing motion sickness.
- Cardiovascular system: Blood circulation slows down and production of red blood cells decreases. Cardiac arrhythmia is common.
- Immune system: The immune system weakens. Radiation exposure from six months in space equates to 10 times the annual exposure on Earth.
- Bones: Skeletal deformation and bone loss are likely with 1 percent of bone mass lost every month. Astronauts become taller because their spines expand while in orbit.
https://www.aljazeera.com/news/2025/...the-human-body
https://newspaceeconomy.ca/2025/03/1...me-on-the-iss/
This is just what we know. There may well be other long term effects that we aren't yet aware of.