Aim. To assess the dynamics of the prevalence of excessive body weight (pre-obesity) and obesity, to identify gender differences among the workers of an industrial enterprise in the period 1994-2010. Methods. Population-based cross-sectional complex preventive studies of 2566 industrial workers (1579 males and 987 females) aged 18-64 years in order to identify the non-infectious diseases were conducted in 1994, 1999 and 2000. Pre-obesity, obesity and other risk factors were assessed according

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... the criteria of the program on Countrywide Integrated Noncommunicable Diseases Intervention of the World Health Organization and according to Russian recommendations regarding the metabolic syndrome. Results. The prevalence of excessive body weight (35.3%) and obesity (12.2%) in 2010 for males was significantly higher than in 1999 (31.1 and 7.7% respectively), the prevalence of obesity alone among them was significantly higher in 2010 than in 1994. In females the prevalence of obesity in 2010 was significantly higher than in 1999 (26.7 and 19.9% respectively) with no significant differences in the frequency pre-obesity (34.0 and 39.6% respectively). The prevalence of pre-obesity and obesity among females in 2010 did not differ significantly from such in 1994. Conclusion. Revealed was an increase in the prevalence of pre-obesity and obesity in males and females in the period from 1999 to 2010; mean body mass indices and frequency of pre-obesity and obesity in females were significantly higher than in males at all periods of the prospective study.