hi all. i know this has been asked a lot before on this forum, and yes i did reread it and look at the info, but it still seems weird to me that holding your breath until you feel like your going to pass out doesnt do any brain damage. i mostly spear and i am wishing to extend my depth and bottom time, thus i look towards the "sport" side of competitive freediving for techniques (i am learning a lot from this board), but the brain damage thing does bother me. sometime when i push myself on bottom time, ascending, my fingers will curl inward like my muscles are spasming or something. yes, i read about the "your brain doesnt get damage for a long time after you stop breathing", yet i still get headaches when i do static apnea. ok, thanks for any responses, and sorry for the frank and almost curt tone of this post, but im short on time.