Nutritional status, dietary and leisure-time physical activity patterns, and energy intake of 65 male metalworkers aged 19 to 58 years from Rio de Janeiro, Brazil, are described in the context of a surveillance build-up system. Mean body mass index was 25.0 kg/m2 (44.6% of the workers were overweight), and mean daily energy intake was 3,209.1 kcal, with a macronutrient distribution of 17.8%, 21.8%, and 60.6% of protein, lipids, and carbohydrates, respectively. The most frequently eaten foods were rice, beans, bread, coffee, sugar, butter, juice, whole milk, soda, beef, and poultry. Vegetable, fruit, meat, and egg intakes were higher than the Food Pyramid Guide suggested portions. The results show a paradox for a surveillance system: (1) high prevalence of overweight, but dietary macronutrients within internationally recommended levels; (2) a well-balanced dietary pattern; and (3) some leisure-time physical activity in half of the workers.