Medical help or someone with a base knowledge pf most things help please???

Question

Well when i go swimming I try and stay underwater for a long time i know this can be dangerous and you can pass out but i know my limit but soemtimes when i come up and have maybe pushed myself too much e.g 2.25 seconds i start to see black and my jaw goes funny i feel sleepy and extrmely light headed i was wondering of this is damaging my brain and whether it has any dier concequences?

Answer 1

You are not damaging your brain.. you will pass out before you reach that stage. Loss of oxygen (not breathing) will cause a 'normal' person to pass out with in 4 to 6 minutes with brain damage occuring at about the 10 minute mark and permenant damage at the 15 minute mark. This is of course dependent upon many variables but a good rule of thumb.

Now...let's talk about what you are doing and your concerns about brain damage. Your feelings that you have when you surface is due to the fact you are right at the brink of passing out. While that in itself has no real direct consequences, the dire consequences will occur when you screw up and push yourself past the point wo where you pass out and then body's involuntary muscle kick in and you take a DEEP breath of water.... and DIE!

Stop doing this underwater. If you want to try to see how long you can hold breath, do it in a safe environment.. NOT under water AND with someone there to assist if you need help.

Hope this helps and that you heed my warnings!

Answer 2

The blackness you are seeing is probably from oxygen deprivation. It is a signal that you are going to harm yourself if you continue. The 2.25 seconds sounds really short, though.

Answer 3

you see black after 2.25 seconds?

Answer 4

Ummm....yeah. Oxygen deprivation kills brain cells.