Free diving is a kind of aquatic activity which depends on the breathe-hold principle. Actually it seems weird when compared to scuba diving. As all scuba-divers would know, first rule is not to hold your breath !
So, what is it all about? Here some tips for the beginners.
1. Time your breath-holding capacity underwater, and record it for future reference.
2. Take your pulse rate by putting both your index and middle finger together and either hold on your wrist or side of neck. You only need to apply slight pressure and wait a few seconds to feel slight "pumps" count for two minutes. Divide this by 2 (makes for a more accurate pulse rate) and you should now have your pulse rate. Record this and keep track of it.
3. Figure out how far down you can go on one breath, but do it with a partner in case of blackout. Record this depth.
4. Practice taking slow, deep breaths -- 10-15 seconds or more on the inhale and the same on the exhale. After you've mastered this, remain still and do it while having somebody else record your pulse.
5. Practice this until you can hold a pulse of under 80 beats a minute before starting the next step.
6. Try going down after deep breathing at the same location you did your last dive. If you went down 7-10 feet the first time, try to get it to 16 feet, 11-19 feet try to go to 25 feet, 30+ just try to beat it by ten feet.
7. Try practicing the above steps over and over. Your pulse should get to 60 or below after about a month, so try getting fins and testing how far you can go.
8. Practice slow, deep, refined kicks with the biggest fins you can find and you will decend faster with fins later on.(Get proper freediving fins with a soft action)
9. Try spending 1 minute under water and 1 minute out of the water to let the co2 escape from your lungs.
10. Grab a rock to help prevent your body's natural buoyancy.
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