This study aims at describing premarital sex behavior as well as to analyze peers impact on premarital sex behavior of teenagers. The study was conducted in Bali, Indonesia. This is an analytic observational research that applied cross-sectional approach. The subject was 566 teenagers who were studying at Senior High Schools in Buleleng, Bali. Data was collected using a questionnaire. We examined the validity and reliability of the data before analyzed it. We also collected data through interviews. After being analyzed by logistic regression analysis, the data shows that 47% of teenagers have never watched porn, 35.9% of teenagers have never conducted kissing activity (with their partner), 24.7% of teenagers have never conducted sexuality rub toward their sexual organs, 22.8% of teenagers have ever masturbated, and 13.1% of teenagers have never experienced sexual intercourse. Teenagers who have got the correct information from peers are possible to have better premarital sex behaviors, 2 times greater than those who have not got correct information (OR = 2; p = 0.003). It is also found that teenagers who have got a good emotional relationship with peers are more possible to have better premarital sex behavior life, 3 times greater, than teenagers who have got a less emotional relationship with peers (OR = 3; p = 0.000). It is concluded that, statistically, there is significant influence between peers and premarital sex behaviors of teenagers in Indonesia.

The current paper is a kind of review study. It reviewed the immunological side in overtraining exercise. The method used in reviewing the content was a descriptive qualitative method. The review itself was based on theoretical views. As the results, it is stated that the beneficial effects of regular exercise on the prevention and therapy of lifestyle, related disease, has been established for a long time. However, it is often misinterpreted, so that people conduct the over-exercise activity. The overtraining, that is a phenomenon of conducting the exercise in excessive duration, frequencies, and intensity impacts the damage of myocardial. Furthermore, the complexity and pleiotropic effects of exercise remain an area of intense research. Therefore, in order to complete the frameworks of overtraining theory, future research, that is to confirm and to investigate pathomechanism of organs damage, is needed to be conducted.

The current study was aimed at finding the effect of teaching models and an authentic assessment on football skill learning achievement by controlling motor educability. The sample consisted of 142 students of Physical Education Health Department that were selected randomly. The study used the 2x2 factorial experimental design, while the data were analyzed using 2-way ANACOVA. The results showed that after controlling motor educability, football skill learning achievement of the students who learned through the Cooperative Learning type Jigsaw model was higher than those who learned through the conventional model; the football skill learning achievement of those who were assessed by portfolio assessment was better than those who were assessed by authentic assessment. There was also an interaction between the teaching model and an authentic assessment on football skill learning achievement. The students who learned through the Cooperative Learning type jigsaw model was more appropriately assessed by portfolio assessment, while those who learned through the conventional learning model was more appropriately assessed by performance assessment.

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This article review was made to discuss the relationship between body image and exercise activity. It is suggested on the articles that negative body image was mostly found in women. Negative body image restricts person's choices to do exercise activity and related to eating pattern of athletes. In the other hand, good exercise activity decrease feelings for negative body image and it is more effective when combined with positive perfectionism and resistance session training. It can be concluded that body image interacts negatively with exercise activity, but exercise activity impacts positively to body image. It is suggested to provide positive body image on the early phase of exercise activity especially for the person intended to decrease his/her body weight through exercise activity.

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Abstract. Excessive training practices without sufficient recovery period (overtraining) may be influential to promote myocardial injury. The aim of this study was to tested the hypothesis that overtraining exercise caused myocardial changes within histopathobiological analysis in rats. In this study, male wistar rats (n= 16) underwent ten weeks of overtraining weeks. Rats were divided into 2 groups: 1) controls (swam 15 minute/day, 5 days/week) and 2) overstrained rats that in 6 week swam twice a day for 1 hour. After sacrificing, the hearts excised for pathological preparation slides.There was significant difference in morphologic histopathological slides between groups. Compared to controlled groups, there was histopathological analysis showed increased chromatin activity fragmentation of myocardial structure in the overstrained group. Hypertrophic of left ventricle also higher in overstrained groups than control. Necrotic bodies spread in left ventricles myocardium of overstrained groups and there were not found in controlled group. The results of study gives an add it ion of evidence about negative effects of overtraining for myocardium. Furthermore, this study shows that avoiding overtraining should be an important rules in order to protect that myocardial injury and needed for an extended investigations.