provided the educational programs with all contents, and follow up after one month

received no intervention, but assessed pre-post

The structure of the educational sessions includes physical education lectures, group discussions, videos, training sessions, physical activities diaries, short quizzes, and feedback after each session. The educational programs were conducted among students with intervention groups at two-level individually and in school. The individual-level includes classroom lectures that mainly emphasized the health benefits of physical activity and provided necessary information about physical activity fitness for 60 minutes and were given weekly for four weeks. In coordination with the school sports teacher, training sessions included moderate to vigorous physical activities for 45 minutes twice weekly for four weeks

Adolescents' Physical Activity-Related Knowledge: This section was developed by the researcher based on previous literature. The questionnaire contained eighteen questions to assess student knowledge about the definition of physical activity, exercise, health, and physical fitness. Types of physical activity, physical activity benefits, and negative consequences of physical inactivity on health, and recommendation. Each of the eighteen items has three alternatives: true, false, and do not know. The total knowledge score was used based on the percentages of the correctly answered questions.

Physical activity performance: Physical Activity Questionnaires for older children (PAQ-C) is used to assess moderate to vigorous physical activity levels over the past 7 days (Crocker et al.,1997). It includes eight questions, each one scored on 5 point scale. Item 1 (Spare time activity) takes the mean of all activities ("no" activity being a 1, "7 times or more" being a 5) on the activity checklist to form a composite score for item 1. Items 2 to 8 (PE, recess, lunch, right after school, evening, weekends, and describes you best), the answers reflect the level of physical activity for each item from lowest activity response to the highest activity response. Then used the reported value is determined for each item (the lowest activity response being a 1 and the highest activity response being a 5). Item 9 reflects the mean of physical activity during the week ("none" being a 1, "very often" being a 5) to form a composite score for item 9

physical activity self-efficacy":The final validated modified version of the physical activity self-efficacy scale adolescent's protocol questionnaire (Motl et al., 2000) consists of 8 items used in this study to measure physical activity self-efficacy. The scale contains two sections: self-management and social support. Self-management of the physical activity section consists of 6 items related to cognitive and behavioral factors that may increase or decrease physical activity participation. Social support was measured by two items which are support from family and friends. The students were asked to choose from 5 items on a Likert scale. The scoring ranged from 1 (disagree a lot) to 5 (agree a lot). The total score of both sections ranged from 8- 40, higher scores indicate higher self-efficacy.