1. Pittsburgh Sleep Quality Index-PSQI:The sleep quality was evaluated through the Turkish version of the PSQI containing 19 self-rated questions searching the sleep quality during the previous month
2. International Physical Activity Questionnaire-IPAQ: The physical activity of the participants was assessed through the Turkish version of the International Physical Activity Questionnaire -Short Form (IPAQ-SF), which includes 6 questions searching the frequency (days per week) and duration (hours) of walking, as well as the intensity of physical activity in the last seven days.
3. Short Form-36-SF-36: The Turkish version of SF-36 was used to understand the health related quality-of -life (HRQOL) of the participants over the past four weeks in eight health concepts.

The sleep quality was evaluated through the Turkish version of the PSQI containing 19 self-rated questions searching the sleep quality during the previous month. It has seven components as subjective sleep quality, sleep latency, sleep duration, sleep efficiency, sleep disturbances, use of sleep medications, and daytime dysfunction.

Each component is scored from 0 to 3, and the Global Pittsburgh Quality of Sleep (PQS) score is the sum of the scores of the seven components that is between 0 and 21. The higher Global PQS scores indicate poor sleep quality and the cut off score for poor sleep is 5 and over.

The sleep quality of the students will be evaluated by means of the Turkish version of the Pittsburgh Sleep Quality Index through face-to-face interview. This assessment will provide us information about the type and duration of their sleep as well as their sleep efficiency, if there are any sleep disturbances or if they are using any sleep medications or not. Additionally, this will provide us about if the sleep quality affects their daytime functions.

The physical activity of the participants will assessed through the Turkish version of the International Physical Activity Questionnaire -Short Form. The frequency (days per week) and duration (hours) of walking, the intensity of their physical activity as if they are low, moderately and vigorously physical active or not will be searched. This covers the duration of the last seven days prior to survey.

The Turkish version of SF-36 will used to understand the health related quality-of -life of the participants over the past four weeks. The eight health concepts: limitations in physical activities because of health problems; limitations in social activities because of physical or emotional problems; limitations in usual role activities because of physical health problems; bodily pain; general mental health (psychological distress and well-being); limitations in usual role activities because of emotional problems; vitality (energy and fatigue); and general health perceptions will be searched. These outcomes will be grouped as physical component summary and mental component summary. The norm data is 0-100, the health related quality of life is increases as the scores are increased. The average score is 50.