# How long could you survive without oxygen after running?

1. Aug 26, 2014

### Soliptic

Suppose you exerted yourself quite hard and ran for a while, then you were immediately deprived of oxygen. How long could you actually survive compared to deprived of oxygen at rest?

2. Aug 26, 2014

### .Scott

It depends of how you remove the oxygen. The time of useful consciousness at Flight Level 500 (50,000 feet MSL) and above is only 6 to 9 seconds.
See https://en.wikipedia.org/wiki/Time_of_useful_consciousness.

Also see: "http://www.geoffreylandis.com/vacuum.html". [Broken]
That article has several citations - including one describing a NASA technician that was accidentally exposed to a vacuum. According to the article, he lost consciousness in 12 to 15 seconds and recovered when air pressure was restored in 30 seconds.

If instead of a drop in atmospheric pressure, you drown in say Nitrogen, then you will last longer - and the effects of the exercise will have a chance to be felt. The wiki article cited above gives an example when exercise cut the useful consciousness time by 50%.

Last edited by a moderator: May 6, 2017