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When humans are exposed to weightlessness they often experience space adaptation syndrome (similar to motion sickness). Also fluid redistribution to the upper body is nearly immediate causing bulging neck veins, puffy face and sinus and nasal congestion. https://en.wikipedia.org/wiki/Effect_of_spaceflight_on_the_human_body

Since these effects are immediate, did anyone collect data (or was it reported by the astronauts) on whether these symptoms completely disappeared, completely remained or somewhere in between the two while the Apollo astronauts were on the moon?

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    $\begingroup$ I'm guessing most chronic effects couldn't be isolated to their time on the moon by any means. Most effects studied would likely be categorized under "effects of spaceflight on the human body" because the effects observed on all astronauts is from their cumulative time in space. I doubt they have isolated information on the chronic effects of being on the moon. The majority of the time on the missions to the moon was spent traveling there, meaning any observed effects could related to the time spent on the moon OR in transit to it. Might want to reword a little bit. $\endgroup$ – Magic Octopus Urn Aug 2 '18 at 20:35
  • $\begingroup$ Honestly, a great paralell would be looking into what effects living on the ISS has on humans-- though we have absolutely no data beyond a 438 days: Russian cosmonaut Valery Polyakov spent nearly 438 consecutive days aboard the Mir space station, from January 1994 to March 1995. He therefore holds the record for longest single human spaceflight — and perhaps set another one for wobbliest legs when he finally touched down. -- I cannot attest to what data the Russians kept, but it may be a place to start. (SOURCE). $\endgroup$ – Magic Octopus Urn Aug 2 '18 at 20:55
  • $\begingroup$ Effects of lunar dust, and effects of Van Allen belts are going to be rather hard to isolate. You do have the astronauts who stayed in the Command Module as a control group to compare lunar landing ones against, for impact of the Moon environment on health. $\endgroup$ – SF. Aug 2 '18 at 21:55
  • $\begingroup$ But the immediate effects of weightlessness may have stopped as soon as they touched down. The motion sickness and fluid redistribution to the upper body, these would have been felt immediately, or not felt if there wasn't enough of a difference between micro g and lunar gravity. But has anyone studied it or asked the astronauts? $\endgroup$ – Brooks Nelson Aug 3 '18 at 13:27
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    $\begingroup$ I thought the Apollo crew debriefings might be a good source for the crews' subjective impressions but I didn't see anything specific to the question in a skim of the A12 or A14 debriefs; don't have time to look at the others. $\endgroup$ – Russell Borogove Aug 22 '18 at 20:44

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