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Background: Metabolic syndrome is a condition that predisposes to cardiovascular disease and diabetes mellitus. In addition, it can have effects over neoplastic pathologies, liver and pulmonary function. Our objective is to analyze the effect of the metabolic syndrome and its components on pulmonary function., Method: 110 subjects from Mexico City were evaluated and anthropometric measurements, glucose determination, triglycerides and high-density lipoprotein (HDL) cholesterol were made. They underwent a simple spirometry. Diagnosis of metabolic syndrome was made following the NCEP-ATPIII criteria., Results: Of 110 individuals, 90 (82%) were women and 20 men (18%); 71 subjects (65%) presented metabolic syndrome. Subjects with central obesity had a forced vital capacity (FVC) lower than subjects without central obesity (2.72 vs. 3.11 liters; p < 0.05). Those with low HDL had better spirometric results than subjects with normal HDL (FEV1 2.36 vs. 1.85 liters; p < 0.05), FVC (2.95 vs. 2.45 liters; p < 0.05) and FEV1/FVC ratio (0.78 vs.74; p < 0.05). Hypertensive subjects presented lower volumes in FEV1 (1.91 vs. 2.38; p < 0.05) and FVC (2.49 vs. 2.99; p < 0.05)., Conclusion: There is no difference between the spirometry volumes of patients with metabolic syndrome versus the metabolically healthy subjects. The only factors associated with a decrease in FEV1 and FVC are central obesity and arterial hypertension. An unexpected finding was the negative correlation between HDL levels and lung function., (Copyright: © 2018 Permanyer.)