Traditional Games and Traditional Sports Boalemo

This study aims to survey traditional games in Boalemo Regency, Gorontalo Province. This research is a qualitative research with the main procedure involving purposeful sampling with research subjects namely children, students, local government and local traditional leaders. The results of this study show that there are several types of traditional games in Boalemo Regency, namely Pa'I, Neka, Redi, Cur-cur Pal, Tera, Palapudu, Moyo, Tenggedi Lo Buawu, Alanggaya Molo'u, Pohayato Lo Dungo Tangi Lo Bindalo, Kura -kura, Tenggedi Lo Wawohu, Wayang Buang-Buang, Puppet Poko-Poko, Kuti-kuti, Use, Ponti, Jump Rope. Meanwhile, traditional game sports in Boalemo Regency, Gorontalo Province, namely Langga. The conclusion is that there are eighteen traditional games and one traditional sport in Boalemo Regency.

Jump rope vortex flow in liquid metal Rayleigh–Bénard convection in a cuboid container of aspect ratio

We study the topology and the temporal dynamics of turbulent Rayleigh–Bénard convection in a liquid metal with a Prandtl number of 0.03 located inside a box with a square base area and an aspect ratio of $\varGamma = 5$ . Experiments and numerical simulations are focused on the Rayleigh number range $6.7 \times 10^{4} \leqslant Ra \leqslant 3.5 \times 10^{5}$ , where a new cellular flow regime has been reported previously (Akashi et al., Phys. Rev. Fluids, vol. 4, 2019, 033501). This flow structure shows symmetries with respect to the vertical planes crossing at the centre of the container. The dynamic behaviour is dominated by strong three-dimensional oscillations with a period length that corresponds to the turnover time. Our analysis reveals that the flow structure in the $\varGamma = 5$ box corresponds in key features to the jump rope vortex structure, which has recently been discovered in a $\varGamma = 2$ cylinder (Vogt et al., Proc. Natl Acad. Sci. USA, vol. 115, 2018, pp. 12674–12679). While in the $\varGamma = 2$ cylinder a single jump rope vortex occurs, the coexistence of four recirculating swirls is detected in this study. Their approach to the lid or the bottom of the convection box causes a temporal deceleration of both the horizontal velocity at the respective boundary and the vertical velocity in the bulk, which in turn is reflected in Nusselt number oscillations. The cellular flow regime shows remarkable similarities to properties commonly attributed to turbulent superstructures.

PENGARUH PELATIHAN JUMP ROPE TERHADAP DAYA LEDAK OTOT TUNGKAI PADA PERENANG USIA DINI

Penelitian ini bertujuan untuk mengetahui pengaruh pelatihan jump rope dan terhadap daya ledak otot tungkai pada perenang usia dini. Penelitian ini menggunakan metode penelitian quasi-experimental dengan pendekatan one group pretest post-test design, yang dilakukan kepada 16 orang perenang kelompok usia IV (< 10 tahun) Jalak Bali Swimming Club. Daya ledak otot tungkai perenang usia muda diukur menggunakan vertical jump dan waktu tempuh renang yang berfokus pada gerakan kaki yang dibantu oleh swimming kick board dalam jarak 25 meter. Hasil pengukuran selanjutnya dilakukan analisis, paired sample t-test untuk mengetahui pengaruh pelatihan jump rope. Hasil analisis menunjukkan bahwa pelatihan jump rope berpengaruh signifikan terhadap daya ledak otot tungkai pada perenang usia dini, baik pengukuran di darat maupun di air (sig. = 0.000 < 0.05, H0 ditolak). Sehingga, dapat disimpulkan penelitian ini adalah pelatihan jump rope dapat digunakan sebagai latihan rutin yang dilakukan oleh perenang usia dini di klub renang untuk meningkatkan daya ledak otot tungkai. Daya ledak otot tungkai yang maksimal akan dapat meningkatkan prestasi perenang usia dini dalam berkompetisi.

The Combined Effects of 6 Weeks of Jump Rope Interval Exercise and Dark Chocolate Consumption on Antioxidant Markers in Obese Adolescent Boys

Research has shown that both dark chocolate and exercise training may have favorable effects on antioxidant function in obese cohorts. However, their combined effect has not been established. We assessed the influences of six weeks of dark chocolate consumption combined with jump rope exercise on antioxidant markers in adolescent boys with obesity. Fifty adolescent boys with obesity (age = 15 ± 1 years) were randomly assigned into one of four groups; jump rope exercise + white chocolate consumption (JW; n = 13), jump rope exercise + dark chocolate consumption (JD; n = 13), dark chocolate consumption (DC; n = 12), or control (C; n = 12). Two participants dropped out of the study. Participants in JW and JD groups performed jump rope exercise three times per week for six weeks. Participants in the DC and JD groups consumed 30 g of dark chocolate containing 83% of cocoa during the same period. Serum concentrations of superoxide dismutase (SOD), total antioxidant capacity (TAC), glutathione peroxidase (GPx), and thiobarbituric acid reactive substances (TBARS) were evaluated prior to and after the interventions. All 3 intervention groups noted significant (p < 0.01) increases in serum concentrations of TAC, SOD, and GPx from baseline to post-test. In contrast, all intervention groups showed significantly reduced serum concentrations of TBARS from pre- to post-test (p ≤ 0.01). Bonferroni post hoc analysis revealed that post-test serum concentrations of TAC in the JD group were significantly greater than C (p < 0.001), DC (p = 0.010), and JW (p < 0.001) groups. In addition, post-test serum concentrations of SOD in the JD group were significantly greater than C group (p = 0.001). Post-test serum concentrations of GPx in the JD group were significantly greater than C (p < 0.001), DC (p = 0.021), and JW (p = 0.032) groups. The post-test serum concentrations of TBARS in the JD group was significantly lower than C (p < 0.001). No other significant between-group differences were observed. The current study provides evidence that dark chocolate consumption in combination with jump rope exercise is more efficient in improving antioxidant capacity than dark chocolate consumption or jump rope exercise alone among obese adolescent boys.

Effects of Shoe Midsole Hardness on Lower Extremity Biomechanics during Jump Rope in Healthy Males

This study investigated differences in lower extremity muscle activations and vertical stiffness during a 2.2 Hz jump rope exercise with different midsole hardnesses (45, 50, 55, and 60 Shores C). Twelve healthy male participants wore customized shoes with different hardness midsoles and performed jump rope exercises in a random order. A nine-camera motion analysis system (150 Hz), a force platform (1500 Hz), and a wireless electromyography (EMG) system (Noraxon, 1500 Hz) were used to measure the biomechanical parameters during the jump rope exercise. The biceps femoris %MVC of barefoot participants was significantly greater than that of those wearing the 45 Shores C (p = 0.048) and 55 Shores C (p = 0.009) midsole 100 ms before landing. The vastus medialis %MVC of barefoot participants was significantly greater than that of those wearing the 55 C midsole (p = 0.005). Nonsignificant differences in vertical stiffness were found between midsole hardnesses and barefoot. Lower extremity muscle activation differed between conditions. The results of this study indicate that for repetitive activities that entail multiple impacts, sports shoes with a low midsole hardness (e.g., 50 Shores C or 45 Shores C) may be appropriate. It is important to provide customers with information regarding midsole hardness in shoe product labeling so that they properly consider the function of the shoes.