Dry statics (breaking 4 minutes) and safety issues

[deepbluesea]

hey guys, how safe is it to do dry statics under no supervision. my current pb is 3 min 40 but i want to bring it up to 4 minutes.. how do i break the 4 minute barrier? will that be another level of training? i feel i have reached the point where i am getting stuck at around 2:30 - 3 minute mark before i get strong contractions.. from about 2 min 40 onwards i do have to admit i feel a little hot in the head but no dizziness what so ever, and prior to the breath hold i never hyperventiliated...i have monitored how my body feels on a regular basis. i am wondering if this is a normal feeling as to be expected of pushing it further or am i doing something wrong.
- i also got a final question about blacking out doing a dry static.. is there any possibility of that happeneing? and would you be able to regain consciousness yourself unlike blacking out in the water..

Thank you for the feedback and tips

 

[hteas]

sit somewhere that you can't hurt yourself if you do keel over. It's not inherently dangerous, but a fall can be.
Are you using oxygen or CO2 tables? They are a good way to improve. If you don't use them, use "search" to find them.