G-Force Tolerance and Heart Rate

[gibberingmouther]

This is about my tabletop game again.

Hypothetically speaking, if your heart rate was faster because of an "altered time rate" - anywhere from X2 to significantly more than that times the normal time rate - would that increase your g force tolerance? I'm speaking mainly about a g-force parallel to the length of your body, like if you're a superhero flying around, but horizontal g forces are also a thing in my game verse.

So, assuming these characters can normally tolerate an acceleration of 9 g's, would the elevated heart rate from the "altered time rate" keep blood flowing through the body even if you accelerate faster than that for a while?

A 2X altered time rate (the name for this ability is from GURPS) means that 1 second for everyone at a normal time rate is 2 seconds for you. You subjectively experience things around you as happening at a slower rate and you can move your limbs faster. Thus, you could move faster (though most fights happen in the air in my game verse) and, more importantly, react and strike faster with your limbs. A 2x time rate means you can punch with 4 times the kinetic energy.

I'm thinking that it wouldn't make a huge difference, but I'm not sure. If your heart can normally just barely cope with the blood pooling to your lower body, then increasing the heart rate even by a crazy amount isn't going to increase the force output of each individual pump. Once you hit the limit where your heart can cope with the blood pooling due to its inertia, a faster heart rate isn't going to help you. Also, there would probably be issues with blood vessels bursting.

Does this sound right?

 

[Ryan_m_b]

Your heart wouldn’t be pumping twice as fast in that scenario. It would be pumping at the same speed as it always has, measured by everything else in your magic time bubble (most importantly; everything else in your body). If you were to subjectively experience time twice as fast as everything else then acceleration for you would feel halved, e.g: the 9.8m/s² of Earth’s gravity becomes 4.9m/s².

This effect applies to anything and you can work out the experience by doubling the time component of whatever relevant equation you’re using. Frequency of light and sound is halved, viscosity of gases and fluids are doubled etc

 

[gibberingmouther]

Your heart wouldn’t be pumping twice as fast in that scenario. It would be pumping at the same speed as it always has, measured by everything else in your magic time bubble (most importantly; everything else in your body). If you were to subjectively experience time twice as fast as everything else then acceleration for you would feel halved, e.g: the 9.8m/s² of Earth’s gravity becomes 4.9m/s².

This effect applies to anything and you can work out the experience by doubling the time component of whatever relevant equation you’re using. Frequency of light and sound is halved, viscosity of gases and fluids are doubled etc

That's one answer to how to enhance g force tolerance, I guess. It seems appropriate that ATR would make it possible for you to accelerate faster. Thank you for your thoughts!

 

[stefan r]

That's one answer to how to enhance g force tolerance, I guess. It seems appropriate that ATR would make it possible for you to accelerate faster. Thank you for your thoughts!

Does it mean you can accelerate 2x faster and fee the same or that the faster acceleration is felt at 1/2 rate?

 

[gibberingmouther]

Does it mean you can accelerate 2x faster and fee the same or that the faster acceleration is felt at 1/2 rate?

You effectively have twice the energy at a 2X ATR so you can use that to accelerate twice as fast as at 1X but feel the same I guess.