How to reduce the amount of diving gas?

When diving, the longer the diving time, the more oxygen consumption, so the shorter the diving time, but as long as the technology is in place, the gas consumption can be reduced. Let's take a look at Bian Xiao's specific skills information.

How to reduce diving gas consumption, the specific information is as follows.

Counterweight Many novice divers often swim forward vertically or at a large angle, feeling that their legs can't be lifted, and they can't always lift them? We believe that this situation is mainly caused by the overweight counterweight. Too heavy or too light counterweight will have some bad consequences.

1, ugly diving swimming posture, vertical or large angle swimming, handstand;

2. The resistance increases when diving;

3. Diving and swimming are very laborious;

4. Invalid kicking will seriously damage the environment, kick coral or reduce visibility.

Where 1-3 will lead to high fuel consumption.

The solution is:

1, suitable counterweight

It is very simple, as mentioned in the OW course: adjust before launching, put on a full set of equipment and counterweight when diving, and breathe through the regulator. When bcd is not inflated, the exhaled head will not be under the water, but the inhaled head will surface. When you hold your breath, your eyes will see that the waterline is the correct counterweight. When the bottle is full of gas, check the appropriate counterweight. It is suggested to add 2-4kg counterweight.

Advanced, counterweight position, must be correctly allocated.

Nowadays, the counterweight system is not only a counterweight belt, but also many buoyancy devices BCD can integrate the counterweight system. The new BCD (Jacket and Fly Back) also has a weight bag near the backpack for placing the weights before and after adjusting the center of gravity. Even some fly-back counterweight systems are mobile and can be used by divers of different heights to customize the counterweight.

The solution is simple. First, confirm the reasonable counterweight in the swimming pool. Second, decompose the reasonable counterweight and adjust the position of the counterweight according to its own state and comfort until it is comfortable.

Respiratory control learns to use its own regulator.

Regulator Regulator is not only safe, sanitary, but also decorative. You can use your own equipment, so you really have your own equipment. Otherwise, the function is useless. Different from the equipment rented by the resort, the slightly better vice head will have a breathing impedance adjusting rod, which is also a big difference between the self-use vice head and the vice head (the wayward main head is as advanced as the vice head and the vice head, forget me). The design of the vice head is often adjusted to the minimum breathing impedance. In order to help users straighten out their breathing as soon as possible, many divers always say that the vice head is better than the main head. Relatively speaking, the breathing impedance is lower and the air is faster.

This is not to let everyone use the spare vice head, but to tell everyone that many excellent vice heads of regulators basically have rotating levers to adjust the respiratory impedance, and everyone should learn to adjust the respiratory impedance according to their own comfort.

Breathing impedance is a small game: the impedance adjustment is small, and breathing is very labor-saving, but every time you inhale, you will spit out a lot of gas, and every time you spit out, there will be unnecessary waste. If the impedance is high, breathing will consume a lot of work, and the inhaled gas may be less, but it will be more laborious, and it is not particularly good to work hard all the time. You will also feel that the deputy head is not breathing well, and even breathing is difficult.

This adjustment is not static, and everyone's physical condition is different every time he dives; The process before and after diving may also be different; The feeling will be different at different depths, and properly adjusting the impedance will help to save gas.

Of course, the maintenance of the regulator is equally important. Regulators maintained as required have the least impact on the diving experience. Friends who don't know can come to the club. We know everything.

Breathing rhythm first summarizes the essence of gas consumption. We already know the relationship between pressure and gas volume. Every time we dive 10 meter in the sea, we increase an atmospheric pressure, and correspondingly, the volume of gas will decrease, that is, the molecular density of gas per unit volume will increase. When we breathe, the amount of air coming in and out of each mouth changes little. The deeper we dive, the more gas molecules we inhale at a time. Theoretically, the deeper we dive, the faster we consume gas.

What controls our breathing is not the number of gas molecules, but the amount of carbon dioxide left in the body. To relieve respiratory tension, you can only exhale carbon dioxide. To exhale carbon dioxide, you must inhale the same amount of air. The slower and longer you breathe, the easier and more effective it is for you to dive, which is also a principle of saving gas.

Then, in the case of sufficient gas, what we need to do is to slow down the breathing rhythm. We can change from big mouth breathing to segmental breathing, three small breaths+three small breaths, or change to mouth breathing+nasal exhalation. The rate of nasal exhalation is more controllable than that of oral exhalation, which can prolong the breathing cycle to a certain extent (provided that you have to do a good job of defogging with a face mirror).

If you are smart in breathing, you will definitely get the key factor: exchange efficiency. How to improve the exchange efficiency is simply to let fresh air take away as much carbon dioxide as possible from the lungs. In this way, our breathing impulse (also called "breathing desire") is relieved and enough oxygen molecules are inhaled. There is a simple way to improve the exchange efficiency: "abdominal breathing".

If you have learned abdominal breathing, please apply what you have learned to diving. If you haven't learned abdominal breathing, then continue to look down.

The lung is like a balloon, 70% is driven by diaphragm, and 30% is other secondary ventilator group, external intercostal muscle.

Diaphragm consists of two parts, 1, middle tendon and 2, peripheral muscle group.

When breathing calmly, the middle rib does not move, the ribs move, the diaphragm contracts, the ribs move up and down with the help of the outer ribs, and the chest cavity expands to complete inhalation. During abdominal breathing, the ribs do not move, the middle tendons move, and the diaphragm contracts as usual. As a result, the entire diaphragm is pulled down, squeezing the abdominal cavity and expanding the chest cavity more effectively. The advantage is that the exchange capacity is increased, and the disadvantage is that the abdominal organs are squeezed.

Look, the middle tendon is the key. You can do abdominal breathing by living this part. Abdominal breathing with the abdomen attached to the diaphragm makes the exhaust active. On the one hand, it can discharge the metabolic carbon dioxide more thoroughly, on the other hand, it also increases the capacity when inhaling.

The middle rib is to expand the lungs downward, that is, to expand the abdominal cavity. When exhaling, keep calm, keep your chest still, press with abdominal cavity, squeeze your lungs upward, and expel the air from your lungs. When inhaling, keep your chest still and press the air down hard. You will feel a little cramp in your stomach (almost at the lowest position in the middle of your ribs), and then you will feel distended.

Remember: don't try to call abdominal muscles directly before you are familiar with abdominal breathing. First of all, you may not know how to transfer them. Second, it may cause muscle strain. Third, it may cause strong hiccups.

In fact, when we were studying OW, we mentioned "deep breathing" underwater and even abdominal breathing, but many students didn't care much about this, so from now on, we should change ourselves and improve ourselves.

Abdominal breathing can not only improve air consumption, but also:

Expand daily vital capacity

Reduce chest and abdomen infection.

Improve the function of abdominal organs

Enhance spleen and stomach function

Conducive to soothing the liver and benefiting the gallbladder.

Promote intestinal peristalsis

Conducive to the circulation of menstrual qi

Neutral buoyancy Once upon a time, when students first started to learn AOW, they were all "non-inflatable BCD". They think that holding your breath and hitting the flippers moderately can achieve "suspension" in the water. They think it is a waste to inflate BCD, and they inflate a lot of air into BCD. As we all know, this concept is simply "picking up sesame seeds and losing watermelon". In the OW course, we will answer that with the depth deepening, the winter clothes on divers may be compressed by pressure, and the buoyancy and warmth will be reduced. At this time, it is necessary to fine-tune the buoyancy state in BCD. Fine-tuning BCD after launching will not only waste gas, but also reduce your exercise gas consumption and get twice the result with half the effort.

Some old divers like to adjust the neutral buoyancy by blowing BCD with their mouths and balance the buoyancy of BCD by breathing used air. This method can also be used for reference, provided that the regulator drains water and the BCD underwater nozzle is very skilled in blowing and inflating.

The secret of maintaining neutral buoyancy underwater lies in "point inflation" combined with breathing. You may not be used to it at first, and you will be "smashed" to the end. Inflate it quickly, and then put it back when there are many results. In fact, after you feel that the diving is accelerating, you can start to rush and adjust it according to the speed. Inflating and exhausting in advance will make your neutral buoyancy control handy, so saving gas is a matter of pushing the boat with the flow.

Trim and FinKickTrim are a posture of the body, which is based on the buoyancy of the center of gravity. Trim's posture is clear to everyone, ready to skydive. In Trim posture, the efficiency of the ribbon is the best. Moreover, when flying slowly on the ground, no matter freestyle kick or frog kick, sand will not be raised. This state is especially suitable for finding macro-organisms, which can effectively approach corals and can be carried out efficiently.

Kicking efficiency has been mentioned twice before, and kicking skill itself is one of the skills that divers should master.

Here are some web kicking techniques to help you master them effectively:

Land simulation exercises, yoga blankets and tables can be used;

Reduce the swing of the body, first relax, and then reduce the resistance;

Push water with ankle hook to increase water surface;

Forget Trim, focus on the action, forget Trim for a while, and it will naturally become what you have learned when you get there.

The double bottle is "open source" compared with the previous throttling. Double bottles can be hung at the back or on the side. It should be noted here that double bottles are not simple 1+ 1. The gas management of double bottles needs to learn professional knowledge and have a set of special treatment procedures.

Double bottles can not only double the air volume, but also improve the posture in the water and further improve the diving efficiency. Moreover, due to the proper adjustment of mentality, the heartbeat will slow down without pressure, and the demand for oxygen will also decrease.

Dry clothes can be worn not only in cold weather but also in warm weather. First of all, people feel comfortable, not cold. Naturally, the body does not need to do extra work to keep warm, so this gas is saved. Second, the drying clothes can be inflated and deflated with extra-small gas cylinders, and the buoyancy of the drying clothes can be adjusted underwater.

When the balance is reached, the balance of the gas position in the clothes can easily make the diver suspend in the water properly. From the point of view of saving gas, airing clothes plays an important role.