Predictive validity analysis of six reference equations for the 6-minute walk test in healthy Brazilian men: a cross-sectional study.

Background: The six-minute walk test (6MWT) is an important tool for evaluating functional capacity and exercise tolerance. The reference equations for the 6MWT in healthy subjects were established on the basis of American and European populations, but reference equations have been proposed with different variables for the Brazilian population.

Objective: To analyze the predictive validity of six reference equations for the six-minute walking distance (6MWD) in healthy adult men.

Effect of time of exposure to environmental risk on the lung function of foundry workers: a cross-sectional study.

[Purpose] This cross-sectional study aimed to compare foundry workers of the metallurgical industry with high and low exposure time and with a control group. [Subject and Methods] The workers were evaluated for pulmonary function and peak expiratory flow (PEF), respiratory symptoms, smoking habits, and physical activity level. Descriptive statistical analysis and ANOVA one-way test were used.

Lung function and functional capacity among foundry workers using effective risk control measures.

Background: Inhaled dust in the environment can trigger specific reactions in the airways and cause various respiratory diseases.

Objective: Evaluate the lung function and functional capacity of foundry workers who are exposed to metals and use effective control measures.

Method: A cross-sectional study was realized with 108 workers at a bronze foundry and machining plant and in maintenance at a private university, both in Brazil.