Purpose The purpose of this study was to investigate characteristics of levels of physical activity in considering gender and different types of competition-oriented physical activity classes using three-dimensional accelerometers. Methods A total of 981 students(505 male students, 476 female students) in six different types of physical education classes were participated in this study. All of the six different types of physical education classes were competition-oriented classes, and levels of physical activity were accessed by three-dimensional accelerometers. Data were analyzed using t-test and ANOVA. Results First, descriptive analyses of participation time of levels of physical activity showed that MVPA of physical education classes is 10.26 mins (22.89%) on average, and, MVPA showed differently in different types of physical education classes in the order of T ball(14.61 mins), flying disk(12.61 mins), soccer(10.78 mins), volley ball(10.56 mins), basketball(9.64 mins), and table tennis(5.73 mins). Second, female students showed significantly lower levels of MVPA in all the different types of physical education classes. Third, post-hoc analyses showed that significantly higher levels of MVPA were found in T ball physical education classes and significantly lower levels of MVPA were found in table tennis physical education classes, compared to other types of physical education classes. Conclusions MVPA in physical education classes is not satisfied with recommended MVPA, and MVPA in Korean physical education classes is lower than MVPA in same types of physical education classes in other countries. In addition, significant mean differences of MVPA are found between male and female students, and new sports physical education classes show higher levels of MVPA compared to classic sports physical education classes. These results indicate that competition oriented physical education classes widely used in Korea need to find ways to increase MVPA and to overcome different levels of MVPA between male and female students.
Active participation in Moderate to Vigorous Physical Activity(MVPA) is the indicator of healthy development for adolescents. However, Korean adolescents’ MVPA have continuously declined, and Korean adolescents have lower levels of MVPA compared to adolescents in other countries. Considering this issue, the purpose of this study is to examine the effectiveness of SPARK M-SPAN program to promote adolescents’ MVPA in P.E. classes and to understand how the promotion of adolescents’ MVPA occurs. To collect data, this study used Sequential Mixed Method and GT3X accelerometers. A total of 168 adolescents (84 in an experimental group and 84 in a control group) participated in this study for the quantitative data analysis, and six students and a teacher were interviewed for the qualitative data analysis. Paired t-test showed that students in SPARK P.E. classes experienced the significant decreases of sedentary behaviors(-339.6 sec) and low intensity P.A.(-96.9 sec) at p<.05 and the significant increases of moderate(+99.3 sec), vigorous(+252.4 sec), and very vigorous intensity P.A.(+84.7 sec) regardless of gender difference at p<.05 except for female students’ moderate intensity P.A.. The qualitative data analysis showed that SPARK classes gave students positive learning environments and led them to experience enjoyment and achievement-orientated learning Key teaching strategies of SPARK program and future research suggestions were provided in the discussion section.
Purpose The purpose of this sequential mixed-method study is to compare the levels of Moderate to Vigorous Physical Activity (MVPA) between the students with intellectual disabilities and students without disabilities in different types of inclusive physical education classes and to understand why different levels of MVPA occur. Methods For this purpose, 17 students with intellectual disabilities and 102 students without disabilities participated in this study, and the levels of MVPA in inclusive physical education classes were accessed using thee dimensional accelerometers. The collected data were analyzed using independent sample t-test. To understand the different levels of MVPA identified in quantitative analysis, four teachers were interviewed. Results Results showed that different levels of MVPA were found in inclusive physical education classes, and this is because the students with intellectual disabilities had participation constraints and teachers did not have knowledge to deal with those constraints. Considering gender difference, only different levels of MVPA were found among male students, which could be stemmed from few opportunities of cooperative works between male students with intellectual disabilities and male students without disabilities. Considering types of inclusive physical education classes, significant different levels of MVPA were identified in tee ball classes. The reason for this could be that the rule of tee ball is too complicated and too many team tasks for the students with intellectual disabilities to understand and to execute. Conclusions Based on the results, practical teaching strategies to increase levels of MVPA of the students with intellectual disabilities are provided in the discussion section.
Purpose The purpose of this study was to evaluate the moderate to vigorous physical activity(MVPA) and sedentary time measured by accelerometer. Furthermore, the level of physical activity and adherence rate of physical activity guideline(PAG) were compared with the self-reported questionnaire. Methods The MVPA, sedentary time, and adherence rate of PAG according to age and sex were examined to people who agreed to wear accelerometers among the participants of the 2014-2015 Korea National Health and Nutrition Examination Survey. To compare the relationship between accelerometer and self-reported questionnaire, Chi-squared test and Spearman correlation analysis were performed. Results The MVPA of the accelerometer-total(AT) was 40.6 minutes/day for men and 31.1 minutes/day for women. Sedentary time was 502.9 minutes/day for men and 498.9 minutes/day for women. The MVPA of accelerometer-bout(AB) estimates was 16.4 minutes/day for men and 14.2 minutes for women. On the other hand, the MVPA of the self-report was 95.8 minutes for men and 64.3 minutes for women, and the sedentary time was 471.2 minutes for men and 455.2 minutes for women. The adherence rate of PAG was 55.6% of the self-report, 56.1% of the AT, and 21.4% of the AB. The correlation between self-report and accelerometer was statistically significant(p < 0.01), but showed a weak correlation coefficient(rho=0.112-0.351). There was no association between AB and self-report(p < 0.01). The sensitivity and specificity of the self-report were 71.3% and 48.6%, respectively. The positive and negative predictive values of the self-report were 27.5% and 86.1%, respectively. Conclusions As a result of this study, self-reported physical activity level by questionnaire had more MVPA and less sedentary time than the accelerometer-determined physical activity. In addition, the adherence rate of the PAG differed from accelerometer and self-report. The difference was significantly increased when comparing AB with the self-report. Therefore, great care must be taken when interpreting accelerometer and self-report questionnaire. Further research will be needed on specific methods that can be used by complementing the two measurement tools.
Purpose The purpose of this study is to measure the daily physical activity of male and female middle school students according to the period (VD: vaction day, SNPE: school day no PE, SPE: school day with PE) by using 3-axis accelerometer, and to compare the characteristics of adolescent physical activity according to gender and period. Methods The subjects were 130 middle school students (68 male, 62 female students). Data collection was performed using a 3-axis accelerometer(GT3X model, ActiGraph). Collected data were converted into time by intensity and rate using physical activity analysis program (Actilife v6.11.9) and analyzed by statistical program (SPSS 25.0). One-way ANOVA and independent sample t-test were used for statistical analysis. Tukey's HSD was used as a post analysis. The statistical significance level was .05. Results As a result, during each periods(VD, SNPE, and SPE), except for MVPA(moderate to vigorous physical activity) time on SPE, sedentary and MVPA time were significantly higher in female students, and low intensity and total physical activity time were significantly higher in male students. For male students, total physical activity time was higher in the order of SPE, SNPE, and VD, and for female students, physical activity time during the semester(SNPE and SPE) was significantly higher than VD. For male students, MVPA time was significantly high in order of SPE, SNPE, and VD, and for female students, it was high in order of SPE, SNPE, and VD but only significant difference occurred between SPE and VD. For both male and female students, sedentary time was high in the order of VD, SNPE, and SPE, but the sedentary time during vacation was significantly higher than during the semester. Conclusions When summarizing the results, first, it was confirmed that school and physical education classes as a physical activity space play a significant role in physical activity, especially MVPA, of male and female middle school students, second, the physical activity effect of physical education class was found to be more effective in male students. Based on the results of this study, it is necessary to conduct studies on various grades and to explore various factors affecting physical activity in a complex way.
Purpose The purpose of this study is to explore the physical activity promotion plans for female student by revising and supplementing the SPARK program which is actively applied as a P.E physical activity improvement program recently. Methods To achieve this, this study followed the custom of action research and apprehended problem in female students' physical activity in SPARK soccer program(first action and examination), problem solving plan(replanning), execution and evaluation of replanned SPARK soccer program (second action and evaluation). The collection and analysis of data was conducted by sequential explanation strategy. Specifically, the study utilized 3 dimensional accelerometer to measure the physical activity in P.E class, and collected data which could apprehend the experience of students by utilizing qualitative study tools(observation, class note, interview). To analyze the collected data, the study utilized mixed-methods study analysis method developed by Greene(2007). Results The study results are as follows. As for the result of first action(October~November 2014), SPARK program increases the entire physical activity in P.E class, but the female students' activity was relatively lower than male students'. The reasons for lower physical activity of female students' were unmotivated class, burdensome class, alienated class. These were specified into teaching strategy to replan and execute the second action (May~June 2015). Compared to first action, the second action showed positive physical activity, and the MVPA of female students' showed statistical difference (<.01). As for the result of qualitative analysis, the positive grounds of second action are 1) motivative resource like "necessity", 2)hard but meaningful learning activity, and 3)kind P.E teacher. Conclusions In conclusion, the implementation of a soccer class with a modified supplement to the SPARK program can enhance physical activity of female middle school students.
PURPOSE The purpose of this study was to investigate the association of physical activity level with insomnia severity (Normal, Subthreshold, Moderate and Severe) in adolescents and to use it as a basis for insomnia prevention. METHODS This study was conducted on a cohort of 50 adolescents under the age of 20 (19 males, 31 females) recruited from Hospital N in Incheon, Korea. Participants were categorized into groups according to the severity of insomnia in both males and females using the Korean version of the Insomnia Severity Index-Korean (ISI-K). The Korean version of the International Physical Activity Questionnaire was also used to calculate participants’ weekly moderate and vigorous physical activity. RESULTS The participants’ characteristics did not differ by insomnia severity in males, but there were significant differences in weight (p=.008), BMI (p=.019), SBP (p=.004), and DBP (p=.019) in females by insomnia severity. In male adolescents, there was no significant difference in the amount of physical activity by insomnia severity, but there was a trend toward decreased amount of physical activity with increasing severity. Among female adolescents, there were significant differences in the amount of physical activity by insomnia severity: moderate (p<.05), high (p<.05), and moderate-high (p<.05). In the unadjusted model, adolescents who did not meet the recommended amount of physical activity (150 minutes per week) were more likely to have insomnia (OR=4.67, 95% CI=1.34–16.24) than those who met the recommended amount of physical activity. The model after adjusting for covariates (gender and body mass index) also showed an association between the recommended amount of physical activity and insomnia (OR=3.94, 95% CI=1.17–13.28). Negatice correlations was found between insomnia index and moderate-to-vigorous physical activity (r=–.357, p=.013). CONCLUSIONS Adolescents are approximately 4.67 times more likely to suffer from insomnia if they do not meet physical activity recommendations, and there was a negative correlation between the insomnia index and moderate-to-vigorous physical activity, suggesting that physical activity should be increased to reduce the insomnia index.
Recently, there have been diverse types of physical activities supported by government policy in S. Korea. However, these activities may not be effective if they do not reach to moderate to vigorous level. This study designed school physical education system based on SPARK program, which include traditional physical education, sports club based physical activity, after school physical activity, and Saturday physical activity, to evaluate its effectiveness associated with physical fitness and empirical meanings of physical activity. This study employed a mixed method research paradigm for better understanding. Among various mixed method paradigm stances, this study employed "blending strategy" for complementary analysis. First of all, the effectiveness in health condition was evaluated by quantitative data. Specifically, physical fitness and lifestyle were analyzed by Helmas, IPAQ, and Accelerometer respectively. Second, empirical meanings of physical activity were analyzed by both Photovoice and in-depth interview which are qualitative research method. The result of this study first showed that a specially designed school physical activity program based on the SPARK contributed to improve students' physical fitness and lifestyle as well, however, there were important differences between male and female students. Second, physical achievement, alteration of spatiotemporal meaning, and change of societal relationship emerged as important themes. Further, these themes showed that they played an important role to maintain students' motivation in physical activity and consequently physical activity promotion was invigorated in school. Based on these results, we synthesized investment factors and process factors and outcome factors respectively. Finally, we suggested alternative teaching methods and suggestions for following research to overcome gender issues.
The purpose of this study is to investigate the influence of resistance training with different exercise intensities on heart rate variability(HRV) in habitual smokers. Twenty-eight healthy young smokers participated in this study were randomly divided into three groups; CON(control), LRT(low-intensity resistance training; 50% 1RM), and HRT(high-intensity resistance training; 70%1RM), respectively. LRT and HRT groups performed an 8-week resistance training(4 upper- and lower body exercises) using weight training machines, whereas CON group maintained their regular activities. All groups were evaluated basal body composition, hemodynamic parameters, HRV as autonomic nervous function, and muscular strength (1RM and isokinetic test) before and after the 8-week training. To assess the effect of 8-week training with different intensities on autonomic regulation, time and frequency domain indices of HRV were calculated from 5min R-R interval recording. As results, both LRT and HRT groups increased baseline 1RM and isokinetic strength compared to CON group. Meanwhile, high-frequency power reflecting parasympathetic activity was significantly increased in HRT compared to CON group. In addition, normalized low frequency power(LF nu) indicating a shift of sympathovagal balance towards sympathetic predominance significantly decreased while normalized high frequency power(HF nu) which reflects vagal predominance significantly increased in HRT compared to CON group. Furthermore, improved cardiac autonomic regulation and parasympathetic activation had significant association with increased muscular strength. Overall, the 8-week training has enhanced muscular strength in both training groups, particularly autonomic balance improved in young habitual smokers with high intensity resistance training.
The purpose of this study was to explore Physically Activity Lifestyle pattern & constraints of high school girl in city, and then to propose P.A. promotional ways. I used International Physical Activity Questionnaire Long version and accelerometer to examine outline of P.A. pattern, and photo-voice as qualitative research techniques. The results were as followings. First, sedentary lifestyles of students in G girls' high school was terrible. Accelerometer was said that their inactive time were about 92.4%, however their moderate to vigorous time about 0.76% of the total time of a week. And, school domain of four domains(school, transportation, leisure, domestic chores) were the most active domain of all. Second, P.A. constraints were analyzed as 'because of something no'(time, effort, will, space, physical skills and person) and 'because of something'(smart phone, car, gaze, rules). The key cause were a shortage of time caused by academic based on school curriculum, sedentary leisure and transportation culture. Lastly, I proposed high school girl' P.A. promotional ways in basis of social ecological model.
