Hi Elaine,
Interesting article. A few big breaths every once in a while will not disturb the acid-base balance of the body, but hyperventilation will (continuous big breaths). After surgery (abdominal or thoracic) we encourage our patients to take big breaths every once in a while to open up the lungs (some of the alveoli in the lungs collapse, and big breaths open them up). Some of you may have had to use an incentive spirometer post surgery to monitor how big you breaths were, and to try and increase them to pre-op levels. It seems everything in moderation is good, too much of anything is a bad thing!
Faylene