Penelitian ini bertujuan untuk menganalisis bagaimana hubungan antara kebugaran jasmani dengan kemampuan konsentrasi dan respon kortisol sebagai penanda biomolekuler pada siswa apakah mengalami tekanan atau tidak. Seseorang yang mempunyai kebugaran jasmani yang baik akan mengalami suplai darah yang membawa nutrisi dan kaya akan oksigen menuju otak akan lebih lancar dan mengakibatkan respon metabolisme seluruh tubuh yang baik sehingga dalam hal ini siswa yang mempunyai kebugaran jasmani yang tinggi akan mempunyai kemampuan konsentrasi yang lebih tinggi dan lama, selain itu respon kortisol akan mengalami penurunan yang sejalan dengan penurunan stres. Metode yang digunakan dalam penelitian ini adalah studi expost facto, dengan rentang waktu ± 20 (duapuluh) bulan. Pengambilan data secara acak berdasarkan letak geografis atau wilayah dataran tinggi dan dataran rendah berbagai wilayah kabupaten kota yang berada di provinsi Jawa Barat. Subjek penelitian melibatkan siswa kelas 4, 5 dan 6 dengan total jumlah subjek penelitian sebanyak 339 siswa, laki-laki 151 orang dan perempuan 137 orang. Hasil pengukuran kebugaran jasmani berdasarkan wilayah dataran tinggi dan rendah sebesar (199,99±24,68) vs (198,51 ± 25,01); kemampuan konsentrasi sebesar (81,34±30,14) vs (69,22±27,09); respon kortisol sebesar (0,145±0,151) vs (0,141±0,103). Berikutnya hasil analisis statistik uji korelasi spearman’s rho antara kebugaran jasmani dengan kemampuan konsentrasi berdasarkan wilayah dataran tinggi dan rendah menunjukkan (r 0,438**; kontribusi 19,18%) vs (r-0,055; besar 0,30%) kebugaran jasmani dengan respon kortisol (r -0,203*; kontribusi 4,12%) vs (r -0,291**; kontribusi 8,47%). Kesimpulan 1) terdapat korelasi positif dan kontribusi yang signifikan pada level 0,01 antara kebugaran jasmani dengan kemampuan konsentrasi di daerah dataran tinggi; 2) tidak terdapat korelasi dan kontribusi antara kebugaran jasmani dengan kemampuan konsentrasi pada daerah dataran rendah; 3) terdapat korelasi negatif dan kontribusi yang signifikan pada level 0,05 antara kebugaran jasmani dengan respon kortisol di daerah dataran tinggi; 4) terdapat korelasi negatif dan kontribusi yang signifikan pada level 0,01 antara kebugaran jasmani dengan respon kortisol di daerah dataran rendah.

Hitting the ball is a complicated ability in softball academicie, because in appreciation to prioritizing movement skills, cognitive appearances additionally need to be investigated, one of which is attention. Meanwhile, going to hit the ball requires excellent attention for an individual student. Exhibiting gamma waves further influence arrangements of hitting performance. The objectives of this study were first, to determine the negative functional correlation between gamma brain waves and hitting skills, then second to know the positive functional correlation between attention and hitting skills and third to determine the effect of attention on increasing hitting skills. The method used in this research is an experimental method with a one-group pretest-posttest design research design. The sampling technique in this study was using a saturated sampling technique. This investigation amounted to 20 subjects, in the calculation of the Pearson product-moment correlation test using SPSS v.23. The first results collected were p-value 0.026 with an r square value of 0.25, so there is a significant negative functional correlation between gamma brain waves and hitting skills in softball learning of 25%. The second issue obtained p-value 0.017 with an r square value of 0.28, so there is a significant positive functional correlation between attention and hitting skills in softball learning by 28%. Furthermore, thirdly, the results obtained p-value 0.0001 between pre-test and post-test, with a significant increase in skills of 70.17%, so there is a significant influence between attention and hitting skills.

Picthers play an important role in softball, especially when defending. Pitching is a high explosive motion involving both smooth and big muscles especially an upper limb. This study aimed to acquire data and empirical proof of muscle performance on learning softball pitching based on science through electromyography (EMG) sensor approach. The research method used in this study is descriptive quantitative with analytical survey. The sampling technique employed in this study is saturated sampling since the sample is all the population which are all members of UPI students' softball club. The results of the data analysis show that the muscle performance included the upper body (34% pectoral, 28% bicepes, 17% deltoid, 14% latisimus dorsi, and 6% triceps), and lower body (42% hamstring, 23% outer quadriceps, 19% inner quadriceps, and 16% glute) for the first session. For the second session, the results of the upper body are 34% pectoral, 31% biceps, 15% deltoid, 14% latisimus dorsi, and 6% triceps and those of the lower body are 41% hamstring, 25% quadricpes, 20% inner quadriceps, and 14% glute. Based on the results, it can be concluded that pitching learning have the most impact on pectoral and hamstring muscles.

The purpose of this research was to determine the relationship of cognitive function between students in normal and obesity categories in high school. The method used in this research is descriptive quantitative research. The population in this study were high school students in Subang City. The technique in this study uses Saturation Sampling and Simple Random Sampling techniques. The samples that have been determined in this study are 44 students high school using descriptive research designs. The instruments used in this study are Growth Chart, grid concentration exercise, digit span, and TPA (Academic Potential Test). The results of the analysis, the value of Tcount for data with Equal Variances Assumed is 2.409 with value of probability (p-value) is 0.02. Based on the data from the analysis, the value of Tcount (2.049) with a probability value (0.020) is smaller (<) than 0.05. Then H0 is rejected, so it can be concluded that there are significant differences in cognitive functions between normal student and obesity categories.

Cognitive function is a process of thinking systematically, logically, and analytically. In the present study, it is indispensible and has an important role in the learning process's success. The enhancement of cognition could change a person's behavior for the better. The thought process depends on the brain's electrical activity and a person's mental condition, which is indicated by brain waves, beta waves. Beta waves affect a person's concentration and awareness. Improvement beta waves on adolescents are positively correlated with improved cognitive function. In addition to cognitive function, they are stimulation by brain jogging or brain exercise. Brain jogging is a mental exercise model that combines cognitive and multitasking. This study used an experimental method with brain jogging treatment intervention for eight weeks, with 17 students who had met the sampling criteria. The beta wave measurement results increased significantly by 19.92% or (16.99±8.48 vs. 20.38±9.34) with a p-value of 0.0001**. Cognitive function increased significantly by 44.36% or (290.88±31.92 vs. 419.94±97.01) with a p-value of 0.0001**. Meanwhile, the Pearson correlation test results between beta waves and cognitive function in the pre-test obtained r = -0.642 with a determinant coefficient of 0.054 or 5.4%, there was no significant correlation, while in the post-test it was obtained r = 0.482 with a determinant coefficient of 0.232. or 23.2% with a p-value of 0.050*. Research and analysis of brain jogging treatment have been shown to improve cognitive function and affect beta waves.