In the university context, lifestyles – LS are related to actions that reflect a daily routine for personal, social, educational and economic performance. Nowadays, Fitness it is related to provide both physical and mental wellbeing and is associated with the welfare, health and quality of life of the practitioners. On the other hand, in the field of healthy behavior, self-efficacy is an indicator of the attitude to achieve successfully the goals and objectives in life, related to physical, psychological and social welfare.

To identify the LS and the level of self-efficacy of the students who took the Institutional Optional Class – IOC in Fitness at the Department of Humanities and Integral Formation – DHIF, during the first semester of 2019 at the Universidad Santo Tomás – Bogotá.

Theoretical framework:
According to literature, LS are behaviors related to life habits. Nahas (2013) mentions that the LS are actions, behaviors and conducts that lead to the satisfaction of human needs to achieve quality of life. On the other hand, Bandura (1977) affirms that the LS comprehend like as patterns of activities in the social context, where people create and develop self-perceptions about their capacity. In addition, Bandura argues that self-efficacy implies the change of behavior related to people being responsible for their own environment and their own social system, affects the choice of activities, the effort required to carry them out and the persistence of the individual for their execution.

Quantitative descriptive cross-sectional study.

The sample was N=69 students aged 24,5±5,5 years, with validation of 95% of the students tested (p<0.05) in the IOC Fitness at DHIF in the first semester of 2019.

Instruments and Procedure:
For lifestyles, it was applied a questionnaire “Pentagon of Well-Being”, proposed by Nahas (2013) which evaluates the components of LS in 15 questions divided into 5 analysis criteria:
1) Nutritional Factors – NF,
2) Physical Activity – PA,
3) Preventive Conduct – PC,
4) Social Relations – SR and
5) Stress Control – SC. For the Self-Efficacy – SE, was designed a self-administered questionnaire of Likert Scale that includes 10 questions.

The sample presented for LS a negative index. For NF, 68% (n=47) do not include fruits and vegetables in their daily diet, and 57% (n=39) consumes food rich in fat. In PA, 61% (n=42) does not do at least 30 minutes of physical activity per day in a week. The PC shows that 70% (n=48) does not know his clinical history and condition health, such as blood pressure and cholesterol levels. In SR, 45% (n=31) does not participate activity in physical activity programs of their community and in SC, 52% (n=36) does not spend time in the day to relax. For the SE, the sample presented a positive index in all the factors, with an average above of 80% (n=55). The students show that manage well their emotions in situations of academic pressure, and in the stress, situation maintains their productivity and goals.

It is evident that there is an unhealthy trend of LS in the students of the IOC in Fitness. This research yields worrying results for young people who could develop one or more health risk factors if they do not adopt significant change measures in the LS. It is necessary to restructure the IOC in Fitness, developing components for the construction of contents related to eating habits, self-care and stress control.