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interests / sci.anthropology.paleo / Bipedal Hs vs Quadrupedal Hs

SubjectAuthor
* Bipedal Hs vs Quadrupedal HsDD'eDeN aka note/nickname/alas_my_loves
`* Re: Bipedal Hs vs Quadrupedal HsMario Petrinovic
 `* Re: Bipedal Hs vs Quadrupedal HsDD'eDeN aka note/nickname/alas_my_loves
  +* Re: Bipedal Hs vs Quadrupedal HsDD'eDeN aka note/nickname/alas_my_loves
  |`- Re: Bipedal Hs vs Quadrupedal HsDD'eDeN aka note/nickname/alas_my_loves
  `- Re: Bipedal Hs vs Quadrupedal HsPeter Nyikos

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Bipedal Hs vs Quadrupedal Hs

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Subject: Bipedal Hs vs Quadrupedal Hs
From: daud.de...@gmail.com (DD'eDeN aka note/nickname/alas_my_loves)
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 by: DD'eDeN aka not - Wed, 8 Sep 2021 05:49 UTC

https://youtu.be/F3h0AkNNP70

15.71 seconds 100m dash

Usain Bolt bpal

9.58 seconds 100m dash

Pan troglodyte qpal

~ 9 seconds 100m dash

Re: Bipedal Hs vs Quadrupedal Hs

<shacii$pbs$2@sunce.iskon.hr>

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From: mario.pe...@zg.htnet.hr (Mario Petrinovic)
Newsgroups: sci.anthropology.paleo
Subject: Re: Bipedal Hs vs Quadrupedal Hs
Date: Wed, 8 Sep 2021 15:07:31 +0200
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 by: Mario Petrinovic - Wed, 8 Sep 2021 13:07 UTC

On 8.9.2021. 7:49, DD'eDeN aka note/nickname/alas_my_loves wrote:
> https://youtu.be/F3h0AkNNP70
>
> 15.71 seconds 100m dash
>
>
> Usain Bolt bpal
>
> 9.58 seconds 100m dash
>
>
> Pan troglodyte qpal
>
> ~ 9 seconds 100m dash

Thanks.

--
https://groups.google.com/g/human-evolution
human-evolution@googlegroups.com

Re: Bipedal Hs vs Quadrupedal Hs

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Subject: Re: Bipedal Hs vs Quadrupedal Hs
From: daud.de...@gmail.com (DD'eDeN aka note/nickname/alas_my_loves)
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 by: DD'eDeN aka not - Wed, 8 Sep 2021 13:35 UTC

On Wednesday, September 8, 2021 at 9:07:31 AM UTC-4, Mario Petrinovic wrote:
> On 8.9.2021. 7:49, DD'eDeN aka note/nickname/alas_my_loves wrote:
> > https://youtu.be/F3h0AkNNP70
> >
> > 15.71 seconds 100m dash
> >
> >
> > Usain Bolt bpal
> >
> > 9.58 seconds 100m dash
> >
> >
> > Pan troglodyte qpal
> >
> > ~ 9 seconds 100m dash
> Thanks.
>
> --
> https://groups.google.com/g/human-evolution
> human-e...@googlegroups.com

Why does qpal sprinter start bipedally, and bipal sprinter start qpal?
Because they both need to adjust their body mass to optimal balance position before accelerating their momentum forward in a controlled fall. Both use their arms gyroscopically while moving, keeping arms still slows them down drastically.

Re: Bipedal Hs vs Quadrupedal Hs

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Subject: Re: Bipedal Hs vs Quadrupedal Hs
From: daud.de...@gmail.com (DD'eDeN aka note/nickname/alas_my_loves)
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 by: DD'eDeN aka not - Wed, 8 Sep 2021 22:22 UTC

On Wednesday, September 8, 2021 at 9:35:04 AM UTC-4, DD'eDeN aka note/nickname/alas_my_loves wrote:
> On Wednesday, September 8, 2021 at 9:07:31 AM UTC-4, Mario Petrinovic wrote:
> > On 8.9.2021. 7:49, DD'eDeN aka note/nickname/alas_my_loves wrote:
> > > https://youtu.be/F3h0AkNNP70
> > >
> > > 15.71 seconds 100m dash
> > >
> > >
> > > Usain Bolt bpal
> > >
> > > 9.58 seconds 100m dash
> > >
> > >
> > > Pan troglodyte qpal
> > >
> > > ~ 9 seconds 100m dash
> > Thanks.
> >
> > --
> > https://groups.google.com/g/human-evolution
> > human-e...@googlegroups.com
> Why does qpal sprinter start bipedally, and bipal sprinter start qpal?
> Because they both need to adjust their body mass to optimal balance position before accelerating their momentum forward in a controlled fall. Both use their arms gyroscopically while moving, keeping arms still slows them down drastically.

Sprinting bipedally Hs backwards

13.6 seconds

https://youtu.be/ga6kIG0DcVI

Re: Bipedal Hs vs Quadrupedal Hs

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Subject: Re: Bipedal Hs vs Quadrupedal Hs
From: daud.de...@gmail.com (DD'eDeN aka note/nickname/alas_my_loves)
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 by: DD'eDeN aka not - Tue, 28 Sep 2021 03:36 UTC

On Wednesday, September 8, 2021 at 6:22:29 PM UTC-4, DD'eDeN aka note/nickname/alas_my_loves wrote:
> On Wednesday, September 8, 2021 at 9:35:04 AM UTC-4, DD'eDeN aka note/nickname/alas_my_loves wrote:
> > On Wednesday, September 8, 2021 at 9:07:31 AM UTC-4, Mario Petrinovic wrote:
> > > On 8.9.2021. 7:49, DD'eDeN aka note/nickname/alas_my_loves wrote:
> > > > https://youtu.be/F3h0AkNNP70
> > > >
> > > > 15.71 seconds 100m dash
> > > >
> > > >
> > > > Usain Bolt bpal
> > > >
> > > > 9.58 seconds 100m dash
> > > >
> > > >
> > > > Pan troglodyte qpal
> > > >
> > > > ~ 9 seconds 100m dash
> > > Thanks.
> > >
> > > --
> > > https://groups.google.com/g/human-evolution
> > > human-e...@googlegroups.com
> > Why does qpal sprinter start bipedally, and bipal sprinter start qpal?
> > Because they both need to adjust their body mass to optimal balance position before accelerating their momentum forward in a controlled fall. Both use their arms gyroscopically while moving, keeping arms still slows them down drastically.
> Sprinting bipedally Hs backwards
>
> 13.6 seconds
>
> https://youtu.be/ga6kIG0DcVI

Sprinting 20m on two hands

https://youtu.be/cEItmb_a20M

Re: Bipedal Hs vs Quadrupedal Hs

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Subject: Re: Bipedal Hs vs Quadrupedal Hs
From: peter2ny...@gmail.com (Peter Nyikos)
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 by: Peter Nyikos - Thu, 30 Sep 2021 16:29 UTC

On Wednesday, September 8, 2021 at 9:35:04 AM UTC-4, DD'eDeN aka note/nickname/alas_my_loves wrote:
> On Wednesday, September 8, 2021 at 9:07:31 AM UTC-4, Mario Petrinovic wrote:
> > On 8.9.2021. 7:49, DD'eDeN aka note/nickname/alas_my_loves wrote:
> > > https://youtu.be/F3h0AkNNP70
> > >
> > > 15.71 seconds 100m dash
> > >
> > >
> > > Usain Bolt bpal
> > >
> > > 9.58 seconds 100m dash
> > >
> > >
> > > Pan troglodyte qpal
> > >
> > > ~ 9 seconds 100m dash
> > Thanks.
> >
> > --
> > https://groups.google.com/g/human-evolution
> > human-e...@googlegroups.com
> Why does qpal sprinter start bipedally, and bipal sprinter start qpal?

> Because they both need to adjust their body mass to optimal balance position before accelerating their momentum forward in a controlled fall. Both use their arms gyroscopically while moving, keeping arms still slows them down drastically.

Looks like you are on the right track [no pun intended]. Do you have a source for this besides yourself?

If not, it would seem that the human qpal start is to take advantage of starting blocks that wouldn't
be of help with a bpal start. Lots of thrust generated at the starting gun.

That reminds me: is it difficult to measure thrust directly? This is very much on topic for swimming plesiosaurs,
in its rightful place, sci.bio.paleontology. The article that you linked here in s.a.p. didn't measure
actual thrust, just measurements of various percentages that I still haven't figured out. I talked about that here:

https://groups.google.com/g/sci.bio.paleontology/c/m0uQAMGJZwQ/m/8slHJHpCAAAJ
Re: Fully quadrupedal swimming in plesiosaurs
Sep 28, 2021, 2:39:27 PM

Peter Nyikos
Professor, Dept. of Mathematics -- standard disclaimer--
University of South Carolina
http://people.math.sc.edu/nyikos

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