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Your legs are moving but your head / vestibular system isn’t experiencing acceleration that it expects with those leg movements. Think of it this way, if you a
by jschlesser 3y ago
Your legs are moving but your head / vestibular system isn’t experiencing acceleration that it expects with those leg movements. Think of it this way, if you are holding a pendulum and take a normal step forward, the pendulum will start to swing. If you take a step forward on the magic floor tiles, your legs move normally but since your body stays in the same place, the pendulum is motionless.
- leereeves 3y ago> Your legs are moving but your head / vestibular system isn’t experiencing acceleration that it expects with those leg movements That's also true on a treadmill. I think the bigger problem would be that the world appears to be moving (unlike a treadmill) and you don't feel any acceleration.
- Ringz 3y agoSo can I use the Disney system to simulate running on a treadmill?
- maximus-decimus 3y agoBut on a threadmill you're going in a straight line and usually at constant speed. A constant speed, you don't have acceleration.
- leereeves 3y agoExactly, you don't have acceleration, and the world around you isn't moving relative to you, so there's no mismatch. The treadmill shows that performing the walking movements without acceleration doesn't generally cause motion sickness.
- c0pium 3y ago> you don't have acceleration If you actually use a treadmill, or watch motion capture, you’ll see that this isn’t the case. It’s a lot of slight accelerations and decelerations. The variation change from person to person, and more experienced runners are able to minimize them, but they’re still present. Edit: this study is peripherally related https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8160945/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8160945/
- leereeves 3y ago> It’s a lot of slight accelerations and decelerations Isn't that always true? If I pay attention to it, I notice a lot of tiny movements of my head, as I just sit here typing. "You don't have acceleration" is just talking about the big accelerations from 0 mph to roughly 3 mph to 0 mph, not implying that you're completely motionless as if frozen in ice.
- c0pium 3y agoAcceleration is change in velocity and change in time, either can effect the apparent amount of acceleration. The velocity you accelerate to or from is just an implementation detail.
- 93po 3y agoYou don't get motion sick on a treadmill because you're not wearing a VR headset. There's no forward motion of your head captured with your eyes to mismatch what your vestibular system is feeling.
- dr_kiszonka 3y agoTo add to your point, there is a somewhat unpleasant sensation once you get off the treadmill, i.e., even if you are standing in place, it feels like you are moving forward.
- aspenmayer 3y agoThis reminds me of the similar weird sensation of phantom movement after jumping on a trampoline.
- c0pium 3y agoThis is incorrect. You don’t get motion sick on a treadmill because the small accelerations and decelerations match what your eyes are seeing. There is motion.
- 93po 3y agoI agree there's motion, I'm saying there isn't a mismatch with what your eyes are seeing, which is what causes the motion sickness
- berniedurfee 3y agoI actually do get a bit of motion sickness when I get off a treadmill. It takes me a couple minutes to get my bearings after stopping.
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