system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Would training under increased gravity, be it strength or otherwise, be beneficial to humans once they returned to normal gravity?
gpt
I think it would be similar to training at high altitudes. That is, there would be measurable benefits for awhile, but they would quickly disappear after returning to normal conditions. 

Our bodies are remarkable at acclimating to new situations, which is a double edged sword. It means we can adjust to harsher conditions like high altitude and (probably) slightly higher gravity, but then we just go right back when things get easier again. 

I would also imagine that, depending on how strong the gravity increase was, prolonged exposure would have serious consequences. Imagine extra gravity pulling on all your internal organs and such, and making it harder for blood to get from your lower body back to your heart, or from your heart up to your brain. The extra exertion would eventually take a toll.