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IMPACT OF ACUTE AIR POLLUTION EXPOSURE ON MILITARY FIREMEN CARDIORESPIRATORY PERFORMANCE

2004; Lippincott Williams & Wilkins; Volume: 15; Issue: 4 Linguagem: Inglês

10.1097/00001648-200407000-00057

1531-5487

Alfésio Luı́s Ferreira Braga, Raul Santo de Oliveira, Turíbio Leite de Barros Neto, Sergio Ricardo Moreti, Roberto Constantino Carneiro, Luiz Alberto Amador Pereira,

Occupational Health and Performance

ISEE-34 Abstract: This study was developed to assess the impact of acute air pollution exposure on the physical cardio-respiratory fitness of military fireman who lived and worked in the city of Guaruja, São Paulo, Brazil. A sample of 25 healthy and non-smoker firemen were selected from a population of 40 volunteers. Their ages ranged from 24 to 45 years. The tests were performed in two phases. Phase A, in Bertioga, a city with low levels of air pollution, and phase B, in Cubatão, a polluted city. Both cities are coastal cities of São Paulo State. The cumulative loads exertion test on the treadmill was approximately 10 minutes +− 2 minutes long with the first stage of 2 minutes and one load of 7 km/h, increasing the intensity of the exertion on one km/h, per minute, until the maximum individual limit. The results show that there are statistically significant differences (p<0.05) in the anaerobic threshold (AT) between Cubatão (35.04 ml/kg/min +− 4.91) and Bertioga (36.98 ml/kg/min +− 5.62), in the heart rate of anaerobic threshold (HRAT) (Cubatão 152.08 bpm +− 14.86; Bertioga 157.44 bpm +− 13.64) and in the anaerobic threshold percentage in relation to the maximum oxygen consumption (% ATVO2max) (Cubatão 64.56% +− 6.55; Bertioga 67.40% +− 5.35). There were no differences regarding maximum consumption of oxygen (VO2max), maximum heart rate (HR max) and anaerobic threshold velocity (AT Velocity) between the cities. The acute exposition to pollutants in the city of Cubatão, SP, caused a significant reduction in the performance in terms of sub maximum levels of physical exertion, but did not significantly affect the maximum aerobic potency.