• Jaime A Vásquez-Gómez, Alex Garrido-Méndez, Carlos Matus-Castillo, Felipe Poblete-Valderrama, Ximena Díaz-Martínez, Yeny Concha-Cisternas, Igor Cigarroa, Miquel Martorell, María Adela Martínez-Sanguinetti, Ana María Leiva-Ordoñez, Fanny Petermann-Rocha, and Carlos Celis-Morales.
• Centro de Investigación de Estudios Avanzados del Maule (CIEAM), Vicerrectoría de Investigación y Postgrado, Universidad Católica del Maule, Talca, Chile.
• Rev Med Chil. 2020 Dec 1; 148 (12): 1750-1758.

BackgroundCardiorespiratory fitness is a strong predictor of mortality and chronic diseases. However, its estimation is costly and time consuming which may limit it broad use in population-based studies.AimTo estimate the cardiorespiratory fitness of the Chilean population by using equations and to characterize fitness levels of the Chilean population by sociodemographic factors.Material And MethodsThis cross-sectional study included 5,958 adults from the Chilean Health Survey conducted between 2016 and 2017. Cardiorespiratory fitness was estimated from sex-specific equations for men and women and expressed as METs (Energy Metabolic Equivalent). Fitness levels were characterized by sociodemographics factors (age, sex, education, income and area of residency).ResultsFitness levels were higher in men (9.01 METs) than in women (6.76 METs) and in average decrease by 0.59 and 0.34 METs per each year increment in age for men and women, respectively. Fitness levels were 12.7 METs and 7.8 METs for 20-year-old men and women, respectively. However, fitness levels decreased to 7.8 METs and 4.3 METs in 90-year-old men and women, respectively. Fitness levels were also higher in individuals living in urban setting, those with higher education or income levels and lean individuals.ConclusionsThis study reports fitness levels in a nationally representative sample of Chile. Fitness levels were higher in men than women however, its decline with age was more pronounce in men than women.

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