Hi all! I've been freediving for about a year now, last 5 months have been very busy with about 4-5 trainings per week in the pool and depth. I have a very good freediving trainer. A week ago I was warming up for my usual depth training by doing FIM static holds at about 20m and was starting to feel lightheaded. On my 3rd warmup static hold I almost fainted, when I got to the surface my lips were blue, I felt dizzy, my toes on my feet felt numb, muscles felt weak. So I decided to quit training that day, figured maybe it was one time thing, maybe I ate something wrong or didn't get enough sleep. Next week I had dynamic trainings in the pool and everything went perfect until on the weekend we went for depth training again. Same thing happened. I am 30, very active, play a lot of competitive beach volleyball and regularly do jiu jitsu. I do not smoke or drink. Do not have any medical conditions that I am aware of. My diet is very good, I really pay attention to what I eat so there's no way it's a problem. The only difference in my routine that has happened in the past 2 weeks is that I started taking BCAA and Iron vegetable supplements. Has anyone seen any similar conditions? I would be really thankful for any input you guys may have.