Cerebral/neuronal damages from hypoxia?

[jochen.marx]

Hello!
I lately told my doctor that I do freediving and train breathholding and he said, that this repeated hypoxia will cause cerebral damages like it is seen from boxers for example.
Does anybody have information about this issue or do you know about scientific articles?
Jochen

 

[J Campbell]

It probably depends on how long you hold your breath. A competitor in static apnea is literally trying to get to the edge of blackout, which means depriving the brain of oxygen. But most recreational divers don’t stay down that long.