PURPOSE
This study was done to evaluate the effects of Yoga exercise on improvements in physical flexibility, posture management behavior, and self-efficacy in adolescents.
METHOD
In this study, the design was a quasi-experimental research design with a one group pretest-posttest design. Participants were 32 students from one high school in Busan Metropolitan City, Korea, who did not engage in regular aerobic exercise and were willing to participate in this study. Yoga exercise was conducted for 70 minutes twice a week for 15 weeks. The data were collected from March 16 to June 22, 2004. The data were analyzed using descriptive statistics, and paired t-test with SPSS Win 12.0.
RESULTS
Trunk flexibility, posture management behavior, and self-efficacy significantly increased after the yoga exercise.
CONCLUSION
Yoga exercise is recommended as a useful nursing intervention that could help prevent spinal-curvature-related disorders among adolescents.

PURPOSE
This research was to determine the characteristics of dysmenorrhea among girls, identify the factors affecting dysmenorrhea.
METHOD
The study subjects were 1653 high school student in Busan Metropolitan city. The data were collected by a self-administered questionnaire between November 1 and November 30, 2002. Descriptive statistics, t-test, one-way ANOVA with Scheffe' test, and stepwise multiple regression analysis in SPSS program were used for data analysis.
RESULT
Students suffering from slight dysmenorrhea made up the majority 52.9%, whereas those with serious cases represented 29.8%. Regarding the measures taken to cope with dysmenorrhea, most of the respondents took analgesics 52.8%. A high points of dysmenorrhea was associated with irregular meal habits(p<0.01), unbalanced diet(p<0.05), stress(p<0.01), and health awareness(p<0.01), first menstruation before they reached 13 (p<0.01), heavy bleeding(p<0.01), family history(p<0.01). Factors affecting the dysmennorrhea of the respondents included the extent of bleeding, family history, health awareness, age during the first menstruation, and degree of stress, accounting for 13.1% of the total variance.
CONCLUSION
To manage dysmenorrhea among girls, the results of the research indicate that students need to have proper awareness of health and manage stress through health education. Likewise, they need to be given positive follow-up management through a holistic nursing approach.

This study was conducted with 512 students in 4 primary schools located at the inner and the outskirt of K city, Northern Kyungsang Province from November 6, 2001 to November 27, 2001(during 3 weeks). This study was a research about the difference of a bullying degree and tendency of both teasing and teased students. The purpose of the study was to help nursing teachers in charge of student consultation and treatment. The findings are as follows. First, for to whom students confess their worries, students in lower grade talked to their parents while students in higher grade talked to their close friends. The higher grader, the higher rate in solving their problems by themselves. For how many students are teased by their peers in groups, 52.0% students answered 1 or 2 students in a class. For the reasons of bully, 37.0% higher graders answered, very selfish and putting on airs after 29.6% lower graders answered, ugly and bad at speaking. Second, for perception of peer relation, 81.3% students participating in the study answered, very important. For a question whether students satisfy present relation with their friends by gender, 53.7% boys were satisfied while 34.6% girls were satisfied. Third, for difference in bullying by gender, boys mainly teased others by using words and physical power(p < 0.000) while girls estranged others. When it goes to teased students, it was the case: boys were bullied physically(p < 0.000) and linguistically while girls were hurt by estrangement. Having nothing direct to do with school achievement, nursing teacher should make good use of such an advantage that students tend to easily confess their worries to them and take care of psychological aspects of students in treatment. Furthermore, it needs to include contents of bully in the regular heath care education.

Recently in Korea, the adolescents' sexual problems including sexual violence have increased, and those phenomena have escalated to be one of the major social issues. This study was conducted to identify the variables related to the sexual harassments of the Korean adolescents. The variables to which the subjects belong were gender, school grade, religion, extracurricular activity, amount of pocket money, school performance traffic mean to school, ownership of PC, internet contact frequency and place, contact to pornography, heterosexual friend, drinking, and smoking. The period of survey was from July 2000 to Dec. 2000. The subjects were 475 middle and high-schoolers in Busan and Kyung-Nam. The instrument to measure sexual harassments of the subjects was questionnaire. That was gained by modifying the three patterns(physical, verbal and visual) in the manual provide by the Ministry of Labor(1999). The degree of sexual harassments was measured by 4-point Likert scale. The collected data was analyzed with t-test and ANOVA by SPSS win(10.0). The findings were as follows ; 1. The variables related to the physical harassment were gender, age, pocket money, perceived school performance, traffic means, contact to pornography, having heterosexual friend, experience of drinking and smoking. 2. The variables related to the visual harassments were gender, age, perceived school performance, traffic mean, internet contact, contact to pornography, having heterosexual friend, experience of drinking & smoking. 3. The variables related to the verbal harassments were gender, age, pocket money, perceived school performance, traffic mean, internet contact, contact to pornography, having heterosexual friend, and experience of drinking & smoking.