90 seconds is uncommon for complete novices, but most people can get to 2-3 minutes within a day or two of training. It's almost entirely psychological up to th

90 seconds is uncommon for complete novices, but most people can get to 2-3 minutes within a day or two of training. It's almost entirely psychological up to that point; blood oxygen levels barely drop for the first few minutes you hold your breath while at rest. You just need to learn what the sensations are, that they are normal, that you aren't at risk (assuming you've done some basic amount of safety education), and to relax into it.