Since I now believe that hyperventilation is the real cause, I've been researching the effects and potential solutions (ok, ya two days before the race is a bit late to be searching for a cure, but it's worth a shot).
Here's what I've found out...
Typical symptoms of hyperventilation
Vivid dreams or nightmares; tingling and numbness of hands, feet, and area around mouth; yawning or sighing; sensation of needing to take a deep breath; panic attacks; feeling of being spaced out, faint or dizzy, episodes of weakness and exhaustion; muscle spasms, twitching, cramp, aching.**I've noticed tingling/numbness in my feet when running, and sometimes even before and after. Even though I recognized the numbness, I didn't consider a connection between the two symptoms. I also experience the sensation of needing to take a deep breath in order to regain some balance. Muscle spasms, cramping, aching, weakness and exhaustion are also present before, during and after each run -- no wonder I despise running so much?!?!
- From www.livestrong.com
Read more: http://www.livestrong.com/article/468947-is-exercise-the-cause-of-hyperventilation/#ixzz24HV3jKhC
POTENTIAL SOLUTIONS:
"Firstly you must always breathe through your nose. This increases the amount of air which is exhaled and immediately re-inhaled and is therefore relatively rich in carbon dioxide. Mouth breathers must make a conscious effort to close their mouths always, if necessary tape your lips closed at night.
Secondly, breathe less deeply and more slowly. Initially this brings a feeling of wanting to breathe more, but this must be ignored. It is a bit like having an irritating itch and not being allowed to scratch it. Some anti-hyperventilation techniques ask you to practice breathing using your diaphragm instead of your chest. I don't see the logic of this because whether you use your diaphragm or your chest muscles, air will still be drawn into the lungs. Buteyko is similarly unconcerned about diaphragmatic breathing, so in this we agree! The results of reducing your rate of breathing are felt very quickly (within a few minutes) good positive feedback to encourage you to continue! But improvement may continue over weeks, so keep at it!
Thirdly, if you catch yourself sighing, yawning or taking a deep breath, hold your breath for a few seconds, breathe out very slowly, then start breathing slowly and shallowly again."
Lactic Acidosis
A study by the University of Iowa found that the accumulation of lactic acid in fatiguing muscles during exercise causes blood pH -- concentration of hydrogen ions -- to drop below normal.The mechanisms in the blood that normally buffer -- prevent changes in pH -- are overridden by the rate of lactate production during intense exercise, and pH continues to drop. Breathing rate is increased and hyperventilation occurs to rid the body of excess hydrogen along with carbon dioxide, and to compensate for the drop in pH.
Read more: http://www.livestrong.com/article/468947-is-exercise-the-cause-of-hyperventilation/#ixzz24HdbZ8lm
Secondly, breathe less deeply and more slowly. Initially this brings a feeling of wanting to breathe more, but this must be ignored. It is a bit like having an irritating itch and not being allowed to scratch it. Some anti-hyperventilation techniques ask you to practice breathing using your diaphragm instead of your chest. I don't see the logic of this because whether you use your diaphragm or your chest muscles, air will still be drawn into the lungs. Buteyko is similarly unconcerned about diaphragmatic breathing, so in this we agree! The results of reducing your rate of breathing are felt very quickly (within a few minutes) good positive feedback to encourage you to continue! But improvement may continue over weeks, so keep at it!
Thirdly, if you catch yourself sighing, yawning or taking a deep breath, hold your breath for a few seconds, breathe out very slowly, then start breathing slowly and shallowly again."
Lactic Acidosis
A study by the University of Iowa found that the accumulation of lactic acid in fatiguing muscles during exercise causes blood pH -- concentration of hydrogen ions -- to drop below normal.The mechanisms in the blood that normally buffer -- prevent changes in pH -- are overridden by the rate of lactate production during intense exercise, and pH continues to drop. Breathing rate is increased and hyperventilation occurs to rid the body of excess hydrogen along with carbon dioxide, and to compensate for the drop in pH.
Read more: http://www.livestrong.com/article/468947-is-exercise-the-cause-of-hyperventilation/#ixzz24HdbZ8lm
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