alt Hacker NewsIt's not just adjustment, there's a decent amount of evidence it's just bad for your health in general, apart from the issues when coming back to earth. Stuff like your circulation also gets messed up.
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rzerowan • today at 3:38 PM
To expand on that - there are many body systems that depend almost entirely on the 1g glodilocks zone. Lymphatic systems movt , venous blood returning deox blood to the heart and even some digestive processes. Keenly dependent on a g value that allows proper muscle tone/function to the systems at play. Too little or too much and and human life becomes non-viable. Throw in the effect of ping ponging between microgravity and 1g and the issues multiply.
I'm fairly involved in this topic and have never heard anything similar to what you've mentioned. And in looking this up, there's a very recent study [1] that's quite relevant. They studied the cardiovascular health of astronauts for 5 years after their return from long-duration stays on the ISS. They were all perfectly healthy.
[1] - https://journals.physiology.org/doi/full/10.1152/japplphysio...