7 ms·

Why wall of death? It's gonna be just a neat cylindrical room with vaguely paraboloid walls. Even if you stop running suddenly, dropping down from 2-3 meters in

Why wall of death? It's gonna be just a neat cylindrical room with vaguely paraboloid walls. Even if you stop running suddenly, dropping down from 2-3 meters in 1/6 g shouldn't be anything more than inconvenient. Weighted suit wouldn't help with the weight of your organs. They are accustomed to hanging inside you at 1g. Running on wall would provide them with that.

heleninboodler 3y ago
> Why wall of death? I think that's just what the cylindrical room is often called when it's used for motorcycles. The paper repeatedly references it, abbreviated "WoD." I don't think there's any death involved. :)
persolb 3y ago
I was going to say “I’d be surprised if organ support is a large issue to an adult. We already have long term astronauts and people who are bed ridden for a long time during recovery. I would expect an issue during development though.” Turns out there is research in this direction: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2379624/pdf/canfamphys00112-0142.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2379624/pdf/can... It seems to say that there is a long term impact on connective tissue hardening… but it blames lack of stretching; not lack of downward force. Any regular movement would seem to fix that. However, internally, organ tissue probably ‘bounces’ more due to gravity during movement… so less gravity means less flex of connective tissue. TLDR: you seem to be right
- yencabulator 3y ago
  > long term astronauts and people who are bed ridden And those people lose a lot of bone mass, muscle mass, and need physical therapy to get back to normal function in 1G. Two months of bed rest will absolutely ruin you. There's a good reason astronauts need to be fit to begin with! 6 months in space causes bone loss equivalent of 20 years of aging. Return to Earth, do physical therapy for 1 year, and you're still "10 years older" as far as bone loss goes. (https://www.sciencenews.org/article/space-bone-loss-density-astronaut-recovery-gravity https://www.sciencenews.org/article/space-bone-loss-density-...). Generally, as far as I know, bone growth is triggered by impacts (think running etc), and is hard to stimulate with just muscle exercises.
  - scotty79 3y ago
    > Generally, as far as I know, bone growth is triggered by impacts (think running etc), and is hard to stimulate with just muscle exercises. Maybe they should do jumping while being pulled "down" by rubber bands.
    - yencabulator 3y ago
      The current microgravity solution is a treadmill for running that rubber bands pull you down to.

heleninboodler 3y ago

> Why wall of death? I think that's just what the cylindrical room is often called when it's used for motorcycles. The paper repeatedly references it, abbreviated "WoD." I don't think there's any death involved. :)

persolb 3y ago

I was going to say “I’d be surprised if organ support is a large issue to an adult. We already have long term astronauts and people who are bed ridden for a long time during recovery. I would expect an issue during development though.” Turns out there is research in this direction: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2379624/pdf/canfamphys00112-0142.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2379624/pdf/can... It seems to say that there is a long term impact on connective tissue hardening… but it blames lack of stretching; not lack of downward force. Any regular movement would seem to fix that. However, internally, organ tissue probably ‘bounces’ more due to gravity during movement… so less gravity means less flex of connective tissue. TLDR: you seem to be right

yencabulator 3y ago
> long term astronauts and people who are bed ridden And those people lose a lot of bone mass, muscle mass, and need physical therapy to get back to normal function in 1G. Two months of bed rest will absolutely ruin you. There's a good reason astronauts need to be fit to begin with! 6 months in space causes bone loss equivalent of 20 years of aging. Return to Earth, do physical therapy for 1 year, and you're still "10 years older" as far as bone loss goes. (https://www.sciencenews.org/article/space-bone-loss-density-astronaut-recovery-gravity https://www.sciencenews.org/article/space-bone-loss-density-...). Generally, as far as I know, bone growth is triggered by impacts (think running etc), and is hard to stimulate with just muscle exercises.
- scotty79 3y ago
  > Generally, as far as I know, bone growth is triggered by impacts (think running etc), and is hard to stimulate with just muscle exercises. Maybe they should do jumping while being pulled "down" by rubber bands.
  - yencabulator 3y ago
    The current microgravity solution is a treadmill for running that rubber bands pull you down to.