Non-PRO English to French Medical Medical (general)

Hyperventilation is defined as breathing more air than is
required to complete an activity; it does not necessarily mean breathing excessively quickly or deeply. A healthy adult breathes around 12 times a minute, inhaling approximately five litres of air by doing so. An example of hyperventilation is breathing 20 times a minute, which could cause around eight litres of air to be
breathed. When done over a week, 30,000 litres of extra air will have been breathed—enough to fill a small swimming pool.
No one notices if a person breathes every three seconds
instead of every five, unless perhaps the breathing is
noisy. However, your body is aware of it, because
breathing like this can be almost relentless. It gradually
lowers the amount of carbon dioxide found in the lungs
and the bloodstream.