For example, extreme colds such as a frozen lake can greatly increase the amount of time you can go before brain damage occurs. These time limits can be extended depending on the precise circumstances. Thus, drowning or other risks become a significant obstacle. Second, being unconscious greatly reduces the likelihood of recovering from the situation that caused the air deprivation in the first place. This can put you at risk of animal attacks, falls, or dangers caused by temperature extremes. First, being unconscious in the wilderness puts you in an extremely vulnerable position. ![]() The risk of losing consciousness is two-fold. This isn’t merely a risk of passing out, rather, depriving your brain of oxygen can cause cells to die and result in permanent brain damage. At anywhere between 30 and 180 seconds without air, you will begin to lose consciousness. The specific amount of time can vary wildly depending on your physical health, level of excitement, and current blood-oxygen level. With the survival rules of 3, you have 3 minutes. Whether you’re underwater, in an enclosed cave, or having to hold your breath for any reason, the rule of 3s states that you only have about three minutes before air deprivation becomes a threat to life. However, air is often overlooked despite being the most basic requirement for life. ![]() When thinking about the basics of survival, people are quick to consider food and shelter.
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