Alright, im new to this site, Im not a usual swimmer but i recently got in the pool and feel in love. I quickly made friends at the local pool on-base. Im a United States Marine with hopes and dreams in Becoming a Reconnaissaince Marine. In other words Marines with Gills. They are like the SEAL's from the Navy and Pararescue from the Air Force. The guys at the pool quickly tought me how to swim "the right way" cross-over and *** stroke as well as the Side-stroke and other technics. i go to the pool everyday. My biggest problem is dealing with the underwater 25 meter swim. To become a Recon Marine i have to accomplish the following....
1) 500 meter swim with out touching the floor in under 17min.
2) 30 min. tread
3) Deep end Rifle retreaval and then treading water for 5 sec.
4) 5 min. water float by using trousers as floating devise
5) 25 Meter underwater swim (my problem)
I have no problem with any of the others but the 25 meter kills me only because i feel like my lungs are going to explode. is there any tips of any kind out there that can prepare me for my "indoc" or evaluation to see if im sea worthy and serve as a Recon Marine. Thanks for hearing me out. :banana:
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Former Member
"So you can release some of that CO2, which releases some of that CO2 buildup." Rick, I can't let this go by without commenting. The buildup of C02 is in your blood, your lungs are just used to blow in and blow out air. If you don't renew the air in the lungs there won't be any change in the dynamics of the exchange of gases from blood stream to lungs. You will blow out air with C02, yes, but you won't make "space" in your lung for the C02 circulating to jump into your lungs, because they will be deflated. There is an equilibrium always between the blood side and the air side in the alveolli. More oxygen on air side will make it move into blood, hence breathe deeply and hold it for awhile because you are letting your blood "catch" the oxygen (the release of C02 is happening at the same time in the opposite direction).
"that breathing out slowly allows better use of the oxygen in your lungs." Bill, this would work with scuba diving and very little with free diving. The breathing out slowly is just a way of making a PEEP (positive end expiratory pressure) which helps maintain the alveolli non collapsed longer. In running this is done by breathing out through partially closed mouth and other techniques. When all out, fast running, or swimming you just got to breathe in real fast and breathe out real fast, the PEEP factor is irrelevant here. You remember, when scuba diving, you deliberately blow out air slowly to use less air, and also to keep your balance and also to maintain position by not changing density too fast. When using a snorkel there is that slow deliberate breathing out. This wold work a little in free diving, or apnea, or whatever we are doing in this thread, but go a little ways with full breath held, then slowly exhale. One of my biggest problems and maybe for others here is exhaling as I am in the middle of a flip turn, so as not to get water up my nose, causing me to gasp for air sooner on the way out of the turn. Good swimmers keep the water out of their noses by slight positive pressure on the air there, but I am lousy and tend to blow air as soon as I start going upside down. Sorry for long post...billy fanstone
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Former Member
"So you can release some of that CO2, which releases some of that CO2 buildup." Rick, I can't let this go by without commenting. The buildup of C02 is in your blood, your lungs are just used to blow in and blow out air. If you don't renew the air in the lungs there won't be any change in the dynamics of the exchange of gases from blood stream to lungs. You will blow out air with C02, yes, but you won't make "space" in your lung for the C02 circulating to jump into your lungs, because they will be deflated. There is an equilibrium always between the blood side and the air side in the alveolli. More oxygen on air side will make it move into blood, hence breathe deeply and hold it for awhile because you are letting your blood "catch" the oxygen (the release of C02 is happening at the same time in the opposite direction).
"that breathing out slowly allows better use of the oxygen in your lungs." Bill, this would work with scuba diving and very little with free diving. The breathing out slowly is just a way of making a PEEP (positive end expiratory pressure) which helps maintain the alveolli non collapsed longer. In running this is done by breathing out through partially closed mouth and other techniques. When all out, fast running, or swimming you just got to breathe in real fast and breathe out real fast, the PEEP factor is irrelevant here. You remember, when scuba diving, you deliberately blow out air slowly to use less air, and also to keep your balance and also to maintain position by not changing density too fast. When using a snorkel there is that slow deliberate breathing out. This wold work a little in free diving, or apnea, or whatever we are doing in this thread, but go a little ways with full breath held, then slowly exhale. One of my biggest problems and maybe for others here is exhaling as I am in the middle of a flip turn, so as not to get water up my nose, causing me to gasp for air sooner on the way out of the turn. Good swimmers keep the water out of their noses by slight positive pressure on the air there, but I am lousy and tend to blow air as soon as I start going upside down. Sorry for long post...billy fanstone
