The purpose of this study is to compare the physical fitness level of adolescents through a physical fitness assessment and a circuit exercise program. A total of 142 middle school students participated. Physical education class consists of a physical fitness assessment, namely, physical activity promotion system (PAPS), and a circuit exercise program. The PAPS measurements include endurance, flexibility, strength, power, body mass index, and total score. The circuit exercise program consists of twist spine, hand walking, rolling squat, cross knee up, jumping and squat, and level-up pacer. First, there were significant differences in PAPS and circuit exercise program according to grade. Second, there was a significant difference in the results of the circuit exercise program according to the level of each physical fitness variable of PAPS. Third, significant correlations were found in the results of the PAPS and circuit exercise program. The use of a circuit exercise program to measure fitness for adolescents can offer convenience for school physical education and be of value as a measure of physical fitness for adolescents. In addition, the circulatory exercise programs used in this study are thought to be applicable to exercise prescriptions to improve endurance, strength, and BMI.

The purpose of this study was to develop criteria for an adolescent circuit exercise program. The subjects of this study were 5268 middle- and high-school students. It consisted of three types of circuit exercise programs which were conducted in the physical education class. In the result of this study, we have found two significant finding. First, there were statistically significant differences by grade level and gender in three types of circuit exercise programs. Second, in order to improve the utilization rate and convenience of various adolescents’ physical activity environments and the field of school physical education, the gender of each circuit exercise program was classified and the five-grade evaluation criteria were presented. The criteria for circuit exercise program developed in this study will be utilized for various youth physical activities to contribute to improving health and physical fitness. In addition, physical education teachers are expected to use this criteria as a standard for evaluating the physical fitness level of adolescents.

Objectives: In this study, the association between the frequency of watching mukbang/ cookbang (online eating and cooking broadcasts) and obesity in Korean adolescents was investigated using data from the 21st (2025) Korea Youth Risk Behavior Web-based Survey.Methods: The subjects were 52,624 middle- and high-school students, who were classified based on watching frequency as follows: non-watchers, monthly watchers, and weekly watchers (≥ 1 time/week). Changes in the dietary behavior of the watchers (n = 34,375) were assessed. Obesity was defined as a sex- and age-specific body mass index ≥ 95th percentile as per the 2017 Korean Children and Adolescents Growth Standard. Complex sample multiple logistic regression was used to calculate the adjusted odds ratios (aORs) and 95% confidence intervals (CIs), controlling for sociodemographic, health-related, and dietary covariates. Sex-stratified analyses and P for trend tests were also conducted.Results: Overall, 65.3% of students watched mukbang/cookbang in the past year. The weekly watchers had significantly higher odds of obesity than the non-watchers (aOR = 1.09, 95% CI: 1.02–1.16; P for trend = 0.011). Sex-stratified analyses showed a positive association in boys (aOR = 1.20, 95% CI: 1.11–1.30), but an inverse association in girls (aOR = 0.86, 95% CI: 0.77–0.97). Among the watchers, the “eating quickly” group had the highest odds for obesity (aOR = 1.54, 95% CI: 1.31–1.82), whereas the “eating night snacks/ snacks” (aOR = 0.85, 95% CI: 0.74–0.98) and “eating spicy or highly flavored foods” (aOR = 0.85, 95% CI: 0.73–0.99) groups were associated with lower odds of obesity.Conclusion: Regular mukbang/cookbang viewing was significantly associated with adolescent obesity. A media-induced “fast eating rate” was identified as a potential behavioral pathway linked to higher obesity risk, suggesting that adolescent obesity prevention programs should incorporate media literacy and behavioral interventions that promote slower eating.