Makrosky
Member
- Joined
- Oct 5, 2014
- Messages
- 3,982
Hey fred, So you stopped doing this or you are still doing it? I guess you found a way to improve the 5 minutes mark??I stopped doing this because the benefits were so short lived for me. Only for about 5 minutes. But that might be because I live at sea level and because I naturally hyperventilate quite a bit. The benefits might last longer for others.