How does tobacco affect aerobic capacity and overall health?








he tobacco negatively affect your health and reduce your aerobic capacity, which is vital to maintaining overall well-being. Tobacco affects every link in the health chain. oxygen, starting from the first breath until energy is produced. If these points are affected, it will inevitably have a negative impact on the company. Aerobic exercise in several areas including lung function. Respiration becomes more complex, oxygen transport and mitochondrial capacity do not work properly.

When we refer to tobacco-related lung function problems, we are referring to the gas exchange process in the lungs.he tobacco It contains harmful substances that can damage the airways and the small air sacs in the lungs (called alveoli). This makes it harder for our lungs to exchange oxygen and carbon dioxide. Think of your lungs as a train station. Some areas of the lungs are like stations with lots of passengers (oxygen), while other areas are empty. Tobacco prevents trains (oxygen) from picking up passengers at these “empty stations,” which means the blood flowing through these areas doesn’t get enough oxygen. Over time, this can cause these “stations” (alveoli) to lose function and become less effective in providing oxygen. This relationship is known as “heterogeneity in the ventilation/perfusion relationship.”


Another problem has to do with transporting this oxygen to where it needs to be consumed to produce energy, i.e. hemoglobin. The problem is related to the presence of carbon monoxide (CO) in tobacco smoke. What happens is that this carbon monoxide has a much higher affinity for hemoglobin in the blood than oxygen does. Reduced oxygen supply is particularly problematic for the powerhouses of our cells, known as cells. Mitochondria, because they require oxygen to efficiently carry out the energy production process: cellular respiration. Mitochondria are critical for producing maximum amounts of ATP from glucose and other substrates, and tobacco smoke impedes mitochondrial function, thereby reducing the efficiency of ATP production. aerobic energy.

Back in the blood circulation and associated with the heart, tobacco can Increase blood pressure and heart rate Due to its stimulating effect on the cardiovascular system. This hinders the heart’s ability to effectively pump blood to the muscles during exercise. If we add that the heart’s energy plants cannot receive as much oxygen and must produce energy because they require increased blood pumping, we see that the heart faces additional challenges due to the lack of available oxygen due to tobacco. An increased heart rate means the heart requires more energy to complete its pumping function. However, as we have seen, tobacco can negatively affect mitochondria, which are critical for energy production. Overall, this creates a detrimental situation for aerobic exercise (exercise performed using oxygen).

also, temporary increase in blood pressure Caused by tobacco and can result from the action of certain chemicals (releasing catecholamines) and the narrowing (constriction) of blood vessels hypertension In the long run, this increases risk Cardiovascular diseases.Another aspect to consider is Dream Because tobacco contains nicotine, which is a stimulant. Smoking, especially near bedtime, can make it difficult to fall asleep and reduce sleep quality.Last but not least, smoking increases the risk of cancer Gastrointestinal diseases, such as peptic ulcer, gastroesophageal reflux disease (GERD), and Crohn’s disease. Tobacco weakens the stomach’s natural barrier and increases the risk of these diseases.

Arnaud Lloret Cabot

Co-founder at Cupa’a
Physical Activity and Exercise Science Postgraduate
Master in Integrative Physiology

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