While, the ability of a subject to hold their breath is extended by factors such as large lung inflations, hyperoxia and hypocapnia (Parkes, 2005). Hyperoxia is when the partial pressure of oxygen taken is by breathing is greater than the atmospheric pressure (Cortés et al., 2015). Hypocania is the decrease in the level of carbon dioxide in the blood (Laffey and Kavanagh, 2002). In addition, there are factors such as a metabolic rate increase could decrease a subject’s ability to hold their breath (Laffey and Kavanagh, …show more content…
One of these parameters is mean breath period, which is the time in seconds it takes to complete a breath. This increase in values could indicate that the body is trying to maximize the amount of oxygen it can absorb per breath. As mentioned previously, during physical activity the body has a greater demand for oxygen compared to when the body is at rest. Another parameter that reflects this hypothesis is the minute air flow rate which is almost three times as high after exercise compared to when at rest. This parameter reflects the amount of air in liters the subject breaths in per minute. This proves that after exercise the subject takes in higher amounts of air and in particular oxygen after exercise. This idea continues to be reflected in the maximum normal air flow during both inhalation and exhalation where the values after exercise were greater, displaying that greater amounts of air were taken into the body and expelled from