Check it Out!    
RideCamp@endurance.net
[Date Prev] [Date Next] [Thread Prev] [Thread Next]
[Date Index] [Thread Index] [Author Index] [Subject Index]

Re: RC: Re: Krebs cycle?



In a message dated 12/17/99 10:00:21 AM Pacific Standard Time, 
fasterhorses@gilanet.com writes:

<< So let me see if I'm getting this.
 
 Various "fuels" (carbohydrates & fats... are these the FFAs & VFAs that
 are being talked about?) are processed to create ATP, which is the
 source of energy.  This is called the Krebs cycle.  But the Krebs cycle
 occurs aerobically, and anaerobic work causes the Krebs cycle to be
 "bypassed" and instead lactic acid is formed.  Which can be used
 anaerobically, but not aerobically.  Yes?  No?>

Kind of. There is always some of both anaerobic and aerobic work going on, no 
matter how fast the horse is going. Most of endurance work is aerobic. The 
argument is over the type of fuel being used. The body prefers glucose-based 
fuel and if glucose is present in abundance, then it inhibits the uptake of 
fats into the muscle cell. Once in the muscle cell, and further into the 
mitochondria, both typs of fuel pass through the mitochondria's oxidative 
enzyme system. Glucose fuel moves through the entire process more quickly and 
that is why the body prefers it if it is available. 
 
 >Now, *if* this is roughly what is going on, is what Tom is talking about
 a method that bypasses the Krebs cycle, but *doesn't* produce lactic
 acid?  Am I even getting warm here?  Lif
 
 Not bipassing the krebs cycle, but avoiding the extra steps necessary in the 
fat pathway. 

ti


=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Ridecamp is a service of Endurance Net, http://www.endurance.net.    
Information, Policy, Disclaimer: http://www.endurance.net/RideCamp   
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=



    Check it Out!    

Home    Events    Groups    Rider Directory    Market    RideCamp    Stuff

Back to TOC