On: Pattern of brain damage is pervasive in Navy SEALs...

[mvgoogler]

Im assuming you are referencing this paper [1], which is about competetive breath hold diving - diving to hundreds of feet on a single breath.

I've never heard of seals doing that kind of training.

[1] https://faseb.onlinelibrary.wiley.com/doi/abs/10.1096/fj.201...