When I was young, in good shape, and doing a fair bit of snorkeling and scuba, I was able to pass 2:15 minutes consistently, and once or twice to 3:00 (but that was VERY uncomfortable).
I just tried it, and tapped out at 1:31 after enough suppression of breathing movement (diaphram pressure blocked by throat) that it was annoying. If I’d been willing to really push I likely could have gotten another 10-15 secs. Male in my mid-50s, not terribly active. I did less than 30 seconds of hyperventilation (about 4 deep exhale/inhale cycles) first, and held the final inhale.
When I was young, in good shape, and doing a fair bit of snorkeling and scuba, I was able to pass 2:15 minutes consistently, and once or twice to 3:00 (but that was VERY uncomfortable).
I just tried it, and tapped out at 1:31 after enough suppression of breathing movement (diaphram pressure blocked by throat) that it was annoying. If I’d been willing to really push I likely could have gotten another 10-15 secs. Male in my mid-50s, not terribly active. I did less than 30 seconds of hyperventilation (about 4 deep exhale/inhale cycles) first, and held the final inhale.