The aim of this study is to determine the effect of preventive nursing interventions, which consist of education / practices including of healthy eating and physical activity and motivational messages which sent through social media to reduce obesity risk in university students who in the risk group for obesity.

This study has been conducted with University students in Turkey. The selected 70 students were associated with obesity risk factors about obesity (owerveight or normal weight and they were in the risk group in terms of obesity according to the risk rating scales, and between 19-24 years old) and randomly assigned to the experimental (35 students) and control group (35 students). Applications for the experimental group for 11 weeks about nutritional habits, practices for physical activity, and motivational messages sent via social media.

Primary Outcome Measure: Nutrition-Exercise Attitude Score, Nutrition-Exercise Behavior Score, Exercise Benefit / Obstacle Score. We used some scales for evaluate the primary outcomes (The Scale of Nutrition-Exercise Attitude-Behavior, The Scale of Exercise Benefit / Obstacle).

Bady Mass Index, Waist / Hip Ratio and Body fat percentage are secondary outcomes.

The data was calculated with SPSS package program.

Inclusion Criteria:

• Preobezes between 25.0-29.9 BMI
• The BMI is 18.5-24.9 and who get above the average score (24-36 points high risk) from the "Risky Behavior Scale University Form: the subscale of nutritional habits
• The BMI is 18.5-24.9 and who get below the mean score (8-20 points high risk) from the Healthy Lifestyle Behavior Scale's subscale of Exercise

Exclusion Criteria:

• BMI below 18.5 and above 29.9
• Constantly regular drug users
• Those who have any health problems (who have had a heart attack, angioplasty or any surgical operation within 3 months, those with heart failure, those with metabolic disease, those with eating disorder, those with cancer, those with any psychological disease, Physically disabled)
• Those who are pregnant
• Those who have participated in any weight management program at least 2 months in advance and are still involved in the nutrition or physical activity program

In the RCT, blindness was done in terms of data collectors and statistician. The data were collected by another investigator (assistant investigator) who did not know who was in the experiment and control group, and the data were recorded by the assistant investigator on the computer, without specifying the experiment and control group.

Experimental and control groups were coded by an assistant investigator. Analysis of the data encoded by groups was done by a statistician.

After the statistical analyzes were made and the research report was written, the assistant investigator explained the coding for the experiment and control group.

In this way, data gathering, statistical analysis and reporting have been blinded.

Note: Two assistant researchers received support from the research process. One of the assistant researcher is a coach who is a graduate of the Faculty of Sport Sciences other than Ph.D. Student of the Department of Public Health Nursing