[francois]

You piss a lot...this is due to a diurisis.

The diurisis in Freediving is not only due to pressure (immersion)...it is also and mainly due to cold.

Diurisis = kidney filtering blood and in this case, seperating water from the rest of the blood. (lowering blood volume)

It is the reaction of an increasing blood pressure.


2 reasons for this increase:


- 1 Cold -

It s cold. To prevent the body from getting cold, all your blood leave the extremities and goes to the center of the body. (toes getting white)
Same quantity of blood concentrated in a smaller volume...blood pressure increase.

- 2 Ambiant Pressure -

The pressure around your body increases whith depth. This pressure aroud the whole body makes blood pressure increase.


This has a direct impact on your performances. Dehydration lowers the quality of muscle functionning.

In fact, blood with less water gets thicker and doesn t flow easely threw the capilars. This means that cells might not get sufficient O2 and nutriments...and that they ll have problems rejecting toxines and CO2.


Conclusion: Hydrate


Francois CIPA Nice