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All Journal Jurnal Keolahragaan Education Achievement: Journal of Science and Research
Sulistiya, Febri
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The Impact of Caffeine Content in Espresso on Cardiovascular Endurance Nugraheni, Priskila Dian; Sulistiya, Febri
Education Achievement: Journal of Science and Research Volume 5 Issue 1 March 2024
Publisher : Pusdikra-Publishing.com

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51178/jsr.v5i1.1778

Abstract

This study aims to determine the impact of caffeine content ranging from 94-150 mg in espresso on the cardiovascular endurance of volleyball players. The research employed a quantitative approach, specifically a quasi-experimental method with a one-group pretest-posttest design. The population for this study comprised 14 members of the volleyball team in Dusun Kalangbangi Lor A. The sampling technique involved screening, and data analysis was conducted using the paired sample T-test, preceded by the Shapiro-Wilk test for normality and the test of homogeneity of variances for homogeneity testing. The research findings revealed that the calculated t-value (t-statistic) was greater than the critical t-value (t-table), specifically 5.612 > 2.365, indicating the acceptance of the alternative hypothesis (Ha) and the rejection of the null hypothesis (Ho). Consequently, the conclusions drawn from the study are as follows: (1) There is an impact of caffeine when consumed in sufficient amounts. (2) Based on linear regression analysis, the R-Square value was found to be 0.891. This implies that the impact of consuming caffeine with a content of 94-150 mg in the short term on cardiovascular endurance is 89.1%, with the remaining 10.1% influenced by other factors. Therefore, consuming 94-150 mg of caffeine 30-60 minutes before undergoing a multistage fitness test can have a positive influence on cardiovascular endurance.
The effectiveness of the Javanese Kickfun Game (J-KIG) as a medium for introducing Wayang Kulit to teenagers: The effectiveness of the Javanese Kickfun Game (J-KIG) as a medium for introducing Wayang Kulit to teenagers Wibowo, Antonio Tri; Setyowati, Servatia Mayang; Saputro, Yulius Agung; Sulistiya, Febri; Sahrah, Alimatus
Jurnal Keolahragaan Vol. 13 No. 2: September 2025
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jk.v13i2.90005

Abstract

Wayang kulit is a Javanese cultural heritage that is full of moral and philosophical values, but adolescents' interest in it is decreasing. Therefore, an innovative approach is needed to reintroduce wayang kulit to the younger generation. This study aims to test the effectiveness of the Javanese Kickfun Game (J-KIG) in introducing puppetry to adolescents. The method used was a quasi-experiment with a one group pretest-posttest design. The research sample consisted of 14 adolescents from Pundong 1, Sleman, Indonesia. The instrument used was the J-KIG cognitive test, and the data analysis was carried out by the Wilcoxon Signed-Rank Test. The results of the normality test showed that the pretest data were normal and the posttest data were not distributed normally, so non-parametric analysis was used. The results of the Wilcoxon test showed a significant improvement between pretest and posttest scores (Z = −3.210; p = 0.001), with 13 respondents improving and 1 respondent having the same score. These findings show that J-KIG is effectively used as an educational medium to introduce the values of wayang kulit to adolescents. The implication of this study is that sports games combined with Wayang kulit, which is a Javanese cultural heritage rich in moral and philosophical values, can be an innovative strategy in physical education, character building, and cultural preservation.
Co-Authors Alimatus Sahrah Nugraheni, Priskila Dian Setyowati, Servatia Mayang Wibowo, Antonio Tri Yulius Agung Saputro dan Sigit Nugroho, Yulius Agung Saputro dan