As my post history indicates I'm new to the forum. I'm slightly less new to freediving/spearing—been doing it very casually and infrequently for a while. However I'm getting more into it, and naturally one of the first steps I wanted to take was try to increase downtime. I've had quite a few misguided notions dispelled pretty quickly (hyperventilating is bad?! My goal isn't to just get as much CO2 out of my body as possible?!), and I'm trying to go about training and doing breathups the right way. But today when I was just doing some static practice in some dead time (breathe up for 3 minutes, 5 seconds inhale, 10 seconds exhale, none of which makes me feel stressed for air or anything of the sort, which I think means I'm not over breathing), the ten or so seconds immediately after my hold breath would feel, for lack of a better word, sketchy. I'd be very light headed, my vision would narrow, and I'd get lots of tingling in my extremities. This would dissipate after a bit and I could continue as normal, but it's unsettling. This happened both in a standing or sitting position (so upright).
I found this very concerning, but started to play around with it. I figured that, as a novice, my breathup was all wonky. But I tried doing no breath up, just a hold, and it still happened. Could someone explain what's happening? Is there a way I might be taking my inhale that's leading to lightheadedness? Any help would be appreciated.
I found this very concerning, but started to play around with it. I figured that, as a novice, my breathup was all wonky. But I tried doing no breath up, just a hold, and it still happened. Could someone explain what's happening? Is there a way I might be taking my inhale that's leading to lightheadedness? Any help would be appreciated.