Background and Aim: One of the risk factors of sleep disordered breathing is obesity. It is believed that unhealthy lifestyle, stemming from poor knowledge attitude, plays a big role in the pathogenesis of obesity. Therefore, if people have good knowledge attitude towards lifestyle, the risk of getting obesity and sleep disordered breathing could be reduced. This research aims to enhance the knowledge and attitude of employees in Universitas Indonesia who had body mass index of more than 23 (n=52). Methods: The author used intervention method in the form of mass counseling which conducted on August 2016. Questionnaire was given before and after education as an instrument to measure changes in knowledge attitude towards lifestyle. There are 3 tests that were used to analyze the data. First, paired T test and Wilcoxon test were performed to see whether there was a significant change in knowledge attitude before and after counseling. Afterwards, Fisher test was done to see the relationship between knowledge attitude changes and respondents' socio demographical factors. Results: Statistical analyses showed significant difference between knowledge attitude before education and knowledge attitude after education (p<0.001). Mean of knowledge score before education was 13.29(±4.39) and after education was 16.40(±4.10). Meanwhile, mean of attitude score before education was 31.69(±6.23) and after education was 36.90(±4.49). Age and gender have significant relationship with attitude changes (p=0,007 and p=0,034). Conclusion: In conclusion, education in the form of mass counseling enhances knowledge attitude changes significantly. This could encourage better behavior; especially in lifestyle hence it would decrease risk of getting obesity and sleep disordered breathing.