Question: Hi, A few years ago I had an opportunity to use a swimming pool for a few weeks and while I was in it every day I tried, with my friends, to see how long I could hold my breath. We would go underwater holding our breaths for as long as we could and then resurface. We did this repeatedly for about an hour a day for 3 weeks. I went from holding for about a minute and a half until at the end of the 3 week period I would stay under for just under 3 minutes, I think. So my question is: Was it harmful what we did? We always took XXXXXXX breathes before going under and no one ever passed out or anything. Is there any reason to think harm could have been done by not breathing for a few minutes underwater, for a period of about an hour a day for three weeks? I hope you can clarify. Thanks

Thanks for your prompt and helpful reply. It's amazing how only a few sentences can be so reassuring. I just want to ask one more thing. Ive been having trouble reading for the past few years and I thought it was from this holding breath procedure. I used to read fine, but now when I look at a page I frequently have to wait for the words to sink in, it doesnt go smoothly. And I also see the wrong letters sometimes, and skip over words. If its not from the breath holding, could you advise me where it could be from? Thanks