Why is the vital capacity increased through training?

Power sizes of the lungs - lung volumes

After a normal exhalation, the chest assumes a relaxed middle position, the so-called resting position. By measuring the volume of air inhaled and exhaled, conclusions can be drawn about the change in lung volume during breathing.

The capacity of the lungs varies greatly from person to person and depends on body size and weight, age, constitution and gender and not so much on the level of training.

As Minute ventilation This is the term for the amount of air that is inhaled and exhaled (ventilated) in one minute. The minute ventilation is the product of the tidal volume and the respiratory rate.

Tidal volume is the volume of air that is inhaled and exhaled during a normal breathing cycle. At rest it is approx. 0.5 liters for adults, under exertion it can increase to approx. 2.5 liters, for endurance-trained top athletes to values ​​of up to 4 liters.

Inspiratory reserve volume is the volume of air that can be additionally inhaled after normal inhalation with deeper breathing.

Expiratory reserve volume is the volume of air that you can voluntarily exhale with the help of the abdominal press after exhaling normally.

Residual volume is the volume of air that remains in the lungs even when you exhale deeply. It is around 1.3 liters in healthy adults. Because the air in the residual volume always mixes with the fresh air inhaled, it still contains a lot of oxygen, which therefore continues to pass into the lung blood during the exhalation phase, whereby the gas exchange between the alveoli and the lung blood takes place evenly and independently of the respective breathing phase.

Under Vital capacity the maximum amount of air that can be exhaled after a breath is understood.
Even if endurance athletes have a significantly increased vital capacity (up to 7 liters - untrained people approx. 3-4 liters / depending on size and weight), this is not really a performance-determining factor.

Total capacity is the total volume of air that is in the lungs after maximum inhalation. The total capacity is made up of the residual volume and the vital capacity.

As Dead space is the sum of all the cavities that serve to supply air, but do not take part in the gas exchange between air and pulmonary capillary blood.