Aerobic exercise contributes to the prevention and treatment of various chronic diseases as well as helps improves endothelial function. It is also beneficial in adaptation of the cardio-pulmonary system and infection resistant. Moreover, aerobic exercise attributes to the release of vasoconstrictor substances and increased nitric oxide availability. However, exposure to fine particles in ambient condition linked to some adverse health effects. This includes oxidative stress, pulmonary systemic inflammation, increased blood coagulation and vascular imbalance. Aerobic exercise in polluted environments increased inhalation of air pollutants due to increased respiratory rate and reduction of nasal resistance. Also, long-term exercise aggravates air pollutant which causes associated respiratory impairment.
Air pollutant exposure during aerobic exercise
There were 20 healthy non-smoking male subjects on this study and aerobic exercise frequencies have been recorded. Wherein indices measured including fractional exhaled nitric oxide, blood pressures; cytokines exhaled breath condensate and pulse-wave analysis. However, the biomarkers of eosinophilic airway inflammation were positively associated with air pollution exposure. Also, the fractional exhaled nitric oxide concentrations were greater in high exercise frequency. Thus, explain that high strength exercise might be at higher risk of particle-mediated respiratory symptoms.
Aerobic exercise is associated with the exposure to air pollutant which caused respiratory inflammation and arterial stiffness. In terms of cardiovascular responses the increased in aortic augmentation pressure indicate higher pulse-wave velocity. Furthermore, aerobic exercise at moderate frequency had a greater protective effect against cardiopulmonary health risk than low or excessive exercise.
Therefore, long-term habitual aerobic exercise in severely polluted areas may strengthen the resistance of the cardiovascular system. But increase the risk of pollutant-related airway inflammation. In addition, surrogate biomarkers of atherosclerosis, arterial wall thickness have been decreased following the long-term aerobic exercise. And also low cardiopulmonary fitness is the key indicators for cardiovascular mortality and coronary heart disease.
Source: Prepared by Joan Tura from BMC Environmental Health
Volume 17:88 December 13, 2018