Re:Body pH, effect on training

[Guest guest]

Hi everyone,

1)Something terminological to think about (maybe of

little imoportance, but to be precise). It is not the

lactic acid buildup that causes acidosis, but

glycolyses and ATP hydrolysis. More information here:

http://ajpregu.physiology.org/cgi/reprint/287/3/R502

2) I was wondering if breath holding could have any

effect on buffer capacities in such sports?

Chrisostomos Georgiou

Ioannina, Greece

>

> Hi folks,

>

> The other day I saw an interview with a professional

mixed martial

> artist, discussing his training and diet regimen.

He spoke about a

> supplment he was taking to help keep his body

alkaline.

>

> I've heard a few responses to this, all apparently

guesswork, some

> things about how keeping alkaline helps the body

recover from lactic

> acid buildup and/or reduce inflammation.

>

> 1. Is keeping the body alkaline important?

> 2. Would it make a difference for a casual athlete,

or just an

> elite athlete?

> 3. If it is important, what are some ways to help

keep body pH at

> the right level?

>

> Thanks

>

> Steve Lawlor

> Toronto, Canada

>

[Guest guest]

This is not conclusively proved. H+ buildup can be from a multiple

causes. At body pH , lactic acid is present as H+ and its conjugate

base, lactate. Its also true that ATP breakdown causes an excess of H+ .

The book Exercise Physiology: Human bionergetics and its applications

has a very lucid discussion on lactate and pyruvate oxidation ,

anaerobic threshold misnomer and so on.

Dan Partelly

Oradea, Romania

> >

> > Hi folks,

> >

> > The other day I saw an interview with a professional

> mixed martial

> > artist, discussing his training and diet regimen.

> He spoke about a

> > supplment he was taking to help keep his body

> alkaline.

> >

> > I've heard a few responses to this, all apparently

> guesswork, some

> > things about how keeping alkaline helps the body

> recover from lactic

> > acid buildup and/or reduce inflammation.

> >

> > 1. Is keeping the body alkaline important?

> > 2. Would it make a difference for a casual athlete,

> or just an

> > elite athlete?

> > 3. If it is important, what are some ways to help

> keep body pH at

> > the right level?

> >

> > Thanks

> >

> > Steve Lawlor

> > Toronto, Canada

> >

>

[Guest guest]

Dan,

What I'm saying, is that lactic acid production is part of the

buffering system. Have a look at fig9, one proton is consumed.

The abstract:

" The development of acidosis

during intense exercise has traditionally been explained by the

increased

production of lactic acid, causing the release of a proton and the

formation of the

acid salt sodium lactate. On the basis of this explanation, if the

rate of lactate

production is high enough, the cellular proton buffering capacity can

be exceeded,

resulting in a decrease in cellular pH. These biochemical events have

been termed

lactic acidosis. The lactic acidosis of exercise has been a classic

explanation of the

biochemistry of acidosis for more than 80 years. This belief has led

to the

interpretation that lactate production causes acidosis and, in turn,

that increased

lactate production is one of the several causes of muscle fatigue

during intense

exercise. This review presents clear evidence that there is no

biochemical support

for lactate production causing acidosis. Lactate production retards,

not causes,

acidosis. Increased lactate production coincides with cellular

acidosis and remains a good

indirect marker for cell metabolic conditions that induce metabolic

acidosis. If

muscle did not produce lactate, acidosis and muscle fatigue would

occur more

quickly and exercise performance would be severely impaired. "

Chrisostomos Georgiou

Ioannina, Greece

> > >

> > > Hi folks,

> > >

> > > The other day I saw an interview with a professional

> > mixed martial

> > > artist, discussing his training and diet regimen.

> > He spoke about a

> > > supplment he was taking to help keep his body

> > alkaline.

> > >

> > > I've heard a few responses to this, all apparently

> > guesswork, some

> > > things about how keeping alkaline helps the body

> > recover from lactic

> > > acid buildup and/or reduce inflammation.

> > >

> > > 1. Is keeping the body alkaline important?

> > > 2. Would it make a difference for a casual athlete,

> > or just an

> > > elite athlete?

> > > 3. If it is important, what are some ways to help

> > keep body pH at

> > > the right level?

> > >

> > > Thanks

> > >

> > > Steve Lawlor

> > > Toronto, Canada

> > >

> >

>