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The study purpose. This study aims to evaluate the effect of the Tabata aquatic training method program in increasing the muscle power of beginner level athletes. Materials and methods. The researcher used a mixed method in this study. There were twenty swimming athletes (n = 20, age: 14.40 ± 1.18 years, height: 169.20 ± 3.18 cm, weight: 62.20 ± 2.26 kg) who agreed to participate in this study and were divided into two groups. The treatment group (n = 10) received the Tabata aquatic program and the control group (n = 10) swam every day without participating in any physical activity. The Tabata aquatic program was carried out for 9 weeks with a frequency of 3 times a week. After implementing the Tabata aquatic program, 10 athletes were interviewed. This study applied a quantitative research instrument, including squat jumps, and a qualitative research instrument, including individual in-depth interviews lasting for 30 minutes each. Analysis of quantitative data using IBM SPSS version 25.0 and qualitative data using thematic analysis was applied. Results. Quantitative study results showed that there was a significant increase in the squat jumps test (leg muscle power) in the treatment group and vice versa, there was no increase in the control group. However, in qualitative research results, most participants mentioned that the Tabata aquatic program is a fun training method and has a positive effect.  Conclusions. After carrying out the Tabata aquatic program for 9 weeks, we confirmed that this training method has a great impact on improving athletes’ leg muscle power in swimming.

Study purpose. One of the main problems during the COVID-19 pandemic that needs to be considered is the decline in physical activity carried out by teenagers. The overall objective of this mixed method is to investigate the effects of the Pokemon Go intervention program to promote physical activity in teenagers during the COVID-19 crisis. Materials and methods. This study was conducted through a mixed method approach. 94 teenagers in grades 10–12 from three high schools agreed to participate in this study. The subjects were divided into 2 groups, namely in the Pokemon Go intervention program group (N=47) and a control group that did not get any physical activity (N=47). The Pokemon Go intervention program was carried out for 7 weeks with an intensity of 3 times a week in physical education classes. After carrying out the Pokemon Go intervention program, the forty-seven subjects were interviewed. The quantitative instrument used to measure the physical activity level was IPAQ, while the qualitative instrument used in-depth interviews. Results. The quantitative and qualitative (mixed) research confirms that the Pokemon Go intervention program showed to positively promote PA levels in teenagers to higher levels in the current COVID-19 crisis. The results of this study are in line with the previous studies which explained that Pokemon Go is an augmented reality game that requires players to travel to various locations in the real world where distances are relatively far. Conclusions. Teenagers with the status of players, ex-players and non-players experienced a significant increase in physical activity level after participating the Pokemon Go intervention program for 7 weeks, and the majority of subjects considered that Pokemon Go had a positive effect to promote physical activity during the COVID-19 pandemic. After implementing the Pokemon Go intervention program for 7 weeks, the results of our study confirm that the physical activity levels of teenagers have gradually increased during the COVID-19.

Psychological elements, namely introverted and extroverted personalities, are currently one of the keys to determining success in academics at the University level, but it is not clear which type is more correlated with academic achievement. The purpose of this study is to investigate the correlation between introverted and extroverted personalities with student academic achievement. The subjects in this study come from the PJKR Department of the University of Suryakancana (N=20) and Halu Oleo (N=20). Data analysis uses SPSS version 25 to find descriptive statistics, normality, data linearity and person product moment correlation. The level of significance used is 0.05. The results of the study finds that introverted personality is significantly correlated with academic achievement in the high category (r= 0.749**), and extroverted personality is not significantly correlated with academic achievement (r= -0.120). Thus, it can be concluded that the personality of students with introverted type is far superior to extroverts in academic achievement at the University level. The contribution in this study contributes to knowledge in the field of physical education psychology, so that later lecturers can pay more attention and optimize academic achievement in students with both types, especially the extroverted type.

During the Covid-19 pandemic, pencak silat athletes experienced difficulty improving physical fitness because training could not be done together with a coach, so their physical fitness decreased significantly. This study aimed to test Tabata and Circuit's effectiveness to improve female Pencak silat athletes' physical fitness. This research was quantitative with experimental methods. The subject of this research consisted of Female Pencak silat athletes with low physical fitness levels (n=20). All subjects were randomly allocated to experiment I of the Tabata weight training (TWT) (n = 10) and experiment II of the Circuit weight training (CWT) (n = 10). The results showed that the physical training such as arm muscle strength (t= 11.00; P<0.05), leg muscle strength (t= 7.900; P<0.05), muscle endurance (t= 6.014; P<0.05), flexibility (t= 10.34; P<0.05), endurance VO2max (t= 17.39; P<0.05) and power (t= 19.20; P<0.05), increased significantly due to the intervention of Tabata weight training. A similar increase occurred in Circuit weight training, physical fitness components, such as arm muscle strength (t= 4.910; P<0.05), leg muscle strength (t= 12.230; P<0.05), muscle endurance (t= 4.792; P<0.05), flexibility (t= 6.107; P<0.05), endurance VO2max (t= 5.533; P<0.05) and power (t= 5.982; P<0.05) increased significantly. Home-based weight training between Tabata and Circuit positively improved the physical fitness of female Pencak silat athletes. This research contributes knowledge in coaching so that lecturers and coaches can use it to improve aspects of athlete's physical fitness.