Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > General Discussions > Off-Topic Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-11-2009, 01:16 PM
Botnst's Avatar
What knockers!
 
Join Date: Jun 2003
Location: There castle.
Posts: 41,905
Born to run

The endurance running hypothesis, the idea that humans evolved as long-distance runners, may have legs thanks to a new study on toes.


Ann Trason, Scott Jurek, Matt Carpenter. These are the megastars of ultra-distance running, athletes who pound out not just marathons, but dozens of them back-to-back, over Rocky Mountain passes and across the scorching floor of Death Valley. If their names are unfamiliar, it’s probably because this type of extreme running is almost universally seen as a fringe sport, the habit of the superhumanly fit, the masochistic, the slightly deranged.

But a handful of scientists think that these ultra-marathoners are using their bodies just as our hominid forbears once did, a theory known as the endurance running hypothesis (ER). ER proponents believe that being able to run for extended lengths of time is an adapted trait, most likely for obtaining food, and was the catalyst that forced Homo erectus to evolve from its apelike ancestors. Over time, the survival of the swift-footed shaped the anatomy of modern humans, giving us a body that is difficult to explain absent a marathoning past.

Our toes, for instance, are shorter and stubbier than those of nearly all other primates, including chimpanzees, a trait that has long been attributed to our committed bipedalism. But a study published in the March 1 issue of the Journal of Experimental Biology, by anthropologists Daniel Lieberman and Campbell Rolian, provides evidence that short toes make human feet exquisitely suited to substantial amounts of running. In tests where 15 subjects ran and walked on pressure-sensitive treadmills, Lieberman and Rolian found that toe length had no effect on walking. Yet when the subjects were running, an increase in toe length of just 20 percent doubled the amount of mechanical work, meaning that the longer-toed subjects required more metabolic energy, and each footfall produced more shock.

“If you have very long toes, the moment of force acting on the foot’s metatarsal phalangeal joint becomes problematic when running,” explains Lieberman. Our hominid ancestors, Australopithecus, of which Lucy is the most famous specimen, had significantly longer toes than humans. “Lucy could have walked just fine with her long toes,” says Lieberman. “But if she wanted to run a marathon, or even a half-marathon, she’d have had trouble.”

more: http://seedmagazine.com/content/print/the_running_man_revisited/

__________________
'Government is like a baby:
An alimentary canal with a big appetite at one end and
no sense of responsibility at the other'
- Ronald Reagan
Reply With Quote
  #2  
Old 04-11-2009, 03:52 PM
Skid Row Joe's Avatar
PRESIDENT DONALD J. TRUMP
 
Join Date: Oct 2007
Location: #KeepingAmericaGreat!
Posts: 6,911
So why do some people get hammer toes?
__________________

06 E320 CDI - PEWTER/CHARCOAL
2017 C7 Stingray Vert /M7-speed manual trans/3LT/FE2 - Arctic White / Jet Black interior
Reply With Quote
  #3  
Old 04-11-2009, 05:26 PM
Dee8go's Avatar
Senor User
 
Join Date: Apr 2006
Location: Arlington, VA
Posts: 7,190
That was an evolutionary development after the appearance of nails . . .
__________________
" The market, like the Lord, helps those who help themselves. But, unlike the Lord, the market does not forgive those who know not what they do."- Warren Buffett

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
Reply With Quote
  #4  
Old 04-12-2009, 02:34 AM
cmac2012's Avatar
Renaissance Dude
 
Join Date: Dec 2004
Location: Berkeley, CA
Posts: 21,935
I was surprised to hear some years back that it's very likely that many of our long ago ancestors obtained food by simply running animals into the ground and spearing them as they lay gasping. Heck, enough well armed tribesmen could probably run down a lion and kill it (if it was alone), I'm guessing, as lions and many other hairy animals don't have the same sort of perspiration/cooling systems that we do.

Many animals are faster than us in short bursts but they tire before we do. At least the 'we' of our ancestral ages before the advent of couch potato-dom.
__________________
cmac

1986 300SDL, 351K
1984 300D, 133K
Reply With Quote
  #5  
Old 04-12-2009, 03:44 AM
Ara T.'s Avatar
Registered User
 
Join Date: Sep 2004
Location: Santa Rosa, CA
Posts: 2,075
Hm. My toes aren't very stubby at all. Guess i'm less evolved I dont know if early Homo sapiens ran around all the time, that is a big caloric expenditure you wouldn't want to necessarily expend if you were in a harsh environment unless you really needed to. Probably way easier to gather nuts and berries than chasing down prey. Of course the advent of the atl-atl and later the bow and arrow certainly made hunting less risky.
__________________
1985 CA 300D Turbo , 213K mi
Reply With Quote
  #6  
Old 04-12-2009, 07:56 AM
Registered User
 
Join Date: Jan 2006
Location: Tucson, AZ
Posts: 4,781
Quote:
Originally Posted by Dee8go View Post
That was an evolutionary development after the appearance of nails . . .
Booooo! Hissss! Thro de bum out!
Reply With Quote
  #7  
Old 04-12-2009, 08:57 AM
Dee8go's Avatar
Senor User
 
Join Date: Apr 2006
Location: Arlington, VA
Posts: 7,190
Hey, I just called it as I SAW it . . .
__________________
" The market, like the Lord, helps those who help themselves. But, unlike the Lord, the market does not forgive those who know not what they do."- Warren Buffett

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
Reply With Quote
  #8  
Old 04-12-2009, 08:59 AM
Dee8go's Avatar
Senor User
 
Join Date: Apr 2006
Location: Arlington, VA
Posts: 7,190
You may not realize it, but the Screwdriver was invented by a bartender who had just wrenched his back . . .
__________________
" The market, like the Lord, helps those who help themselves. But, unlike the Lord, the market does not forgive those who know not what they do."- Warren Buffett

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
Reply With Quote
  #9  
Old 04-12-2009, 09:27 AM
Kuan's Avatar
unband
 
Join Date: Jan 2001
Location: At the Birkebeiner
Posts: 3,811
Stubby toes -> better runner -> more attractive to mate -> foot fetish

Got it! I love my women with stubby toes and big t!ts.
__________________
You don't need a weatherman to know which way the wind blows - Robert A. Zimmerman
Reply With Quote
  #10  
Old 04-12-2009, 11:07 AM
Mistress's Avatar
No crying in baseball
 
Join Date: Apr 2006
Location: Inside a vortex
Posts: 624
We now have hair on our knuckles which means at some point we picked out hands up off the ground as well.
__________________
"It's normal for these things to empty your wallet and break your heart in the process."
2003 S430- "Yolanda"
Reply With Quote
  #11  
Old 04-12-2009, 12:45 PM
Registered User
 
Join Date: Jul 2004
Posts: 7,334
Quote:
Originally Posted by Mistress View Post
We now have hair on our knuckles which means at some point we picked out hands up off the ground as well.
I'm waiting for someone to ask why he has hair on his palms...
because he has long toes?
Reply With Quote
  #12  
Old 04-12-2009, 02:30 PM
Botnst's Avatar
What knockers!
 
Join Date: Jun 2003
Location: There castle.
Posts: 41,905
I think I maybe a long distance runner. Maybe for days with all of this stored-up energy I'm carrying in my suet overcoat.
__________________
'Government is like a baby:
An alimentary canal with a big appetite at one end and
no sense of responsibility at the other'
- Ronald Reagan
Reply With Quote
  #13  
Old 04-12-2009, 02:40 PM
Kuan's Avatar
unband
 
Join Date: Jan 2001
Location: At the Birkebeiner
Posts: 3,811
Ya know, brown fat is all the rage these days.
__________________
You don't need a weatherman to know which way the wind blows - Robert A. Zimmerman
Reply With Quote
  #14  
Old 04-12-2009, 04:09 PM
Registered User
 
Join Date: Jul 2002
Location: S. Texas
Posts: 1,237
Pigeon toed people can run faster than slew footed ones.
Reply With Quote
  #15  
Old 04-12-2009, 09:56 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 35,910
I used to be pidgeon towed but taught my self to straigten my feet.

I have long toes too. So THATS why I am a slug!

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 04:21 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page