Re: chest pains whilst running


Andrew B. Chung, MD/PhD wrote:
Kumar wrote:
Andrew B. Chung, MD/PhD wrote:
jon101.taylor@xxxxxxxxx wrote:
Anybody got any ideas about this one?
I'm a 34 year old, experienced runner, normally I train 6 days a week
between 3 and 8 miles a day. Over the last year, I've started
experiencing a sharp pain in the left side of my chest. its happened
around 5 or 6 times now and normally occurs when Im exerting myself for
long periods. it comes on very quickly and i have to stop immediately,
the pain immediately goes away. If I start running again the pain
returns. Ive asked my doctor about it and he says Ive pulled a muscle
in my chest. Im still a bit worried though. Any comments would be much
appreciated..

Would suggest you ask your doctor for a referral to consult with a
cardiologist. It should be a simple matter for the cardiologist to
determine whether it is your heart versus other things such as
musculoskeletal which is what your doctor believes.

Btw, can such pain be lactic acid oriented?

Not clinically seen in physically fit persons like how the OP of this
thread is described.

Just repeating;
" Exercise and lactate
During intense exercise, such as sprinting type activities, when the
rate of demand for energy is high, lactate is produced faster than the
ability of the tissues to remove it and lactate concentration begins to

rise. This is a beneficial process since the regeneration of NAD+
ensures that energy production is maintained and exercise can continue.

Contrary to popular belief, this increased concentration of lactate
does not directly cause acidosis, nor is it responsible for delayed
onset muscle soreness (muscle pain or "burning").[1] This is because
lactate itself is not capable of releasing a proton, and secondly, the
acidic form of lactate, lactic acid, cannot be formed under normal
circumstances in human tissues. Analysis of the glycolytic pathway in
humans indicates that there are not enough hydrogen ions present in the

glycolytic intermediates to produce lactic or any other acid.


The acidosis that is associated with increases in lactate concentration

during heavy exercise arises from a separate reaction. When ATP is
hydrolysed, a hydrogen ion is released. ATP-derived hydrogen ions are
primarily responsible for the decrease in pH. During intense exercise,
aerobic metabolism cannot produce ATP quickly enough to supply the
demands of the muscle. As a result, glycolysis (anaerobic metabolism)
becomes the dominant energy producing pathway as it can form ATP at
high rates. Due to the large amounts of ATP being produced and
hydrolysed in a short period of time, the buffering systems of the
tissues are overcome, causing pH to fall and creating a state of
acidosis. This may be one factor, among many, that contributes to the
acute muscular discomfort experienced shortly after intense
exercise.[citations needed]


Although it is not firmly established, it is possible that lactate may
contribute to an acidotic effect via the strong ion difference, however

this has not been well investigated in exercise physiology research and

so its contribution is still uncertain.[citation needed]"
http://en.wikipedia.org/wiki/Lactic_acid


I think, now it is thought as an indirect reason. Not sure, but LDH
isoenzimes may indicate possible presence of lactate effect at
different parts?


Btw, how stress tests can indicate false diagnosis of CV disorders?



May GOD continue to heal your heart by curing your diabetes, dear
neighbor Kumar whom I love unconditionally.

Prayerfully in Christ's amazing love,

Andrew <><
--
Andrew B. Chung
Cardiologist, Atlanta, Georgia, USA
http://HeartMDPhD.com/HolySpirit

As for knowing who are the very elect, these you will know by the
unconditional love they have for everyone including their enemies
(Matthew 5:44-45, 1 Corinthians 13:3, James 2:14-17).
http://HeartMDPhD.com/Love

.

Relevant Pages

  • Re: chest pains whilst running
    ... Lactic acid from muscles does not cause muscle pain. ... " Exercise and lactate ... During intense exercise, such as sprinting type activities, when the ...
    (sci.med.cardiology)
  • Re: chest pains whilst running
    ... " Exercise and lactate ... During intense exercise, such as sprinting type activities, when the ... ability of the tissues to remove it and lactate concentration begins to ... ensures that energy production is maintained and exercise can continue. ...
    (sci.med.cardiology)