Water is a molecule that plays an essential role in the muscle contraction process because muscle is a tissue that mostly contains water (75-80%). Therefore, athletes need to maintain fluid intake to support their physical activities when competing and when training. Nevertheless, in several studies, it was noted that some athletes experienced hypohydration or dehydration, which ultimately impaired muscle performance. Therefore, this study was conducted to determine the hydration protocol intervention on muscle strength, endurance, and power performance. This research is an analytical study with quasi-experimental research methods, namely single-arm pre-post study design using secondary data. Subjects of this study were 69 athletes year 2020 (named consecutively: Muaythai 9, Pencak silat 12, wrestling 10, judo 18, and taekwondo 20 athletes). This research was conducted from December 2019 to January 2020. In the beginning, all athletes were tested for muscle strength using a leg dynamometer, then muscle endurance tests using push-up and sit-up tests, and muscle power tests using the triple hop test of the right and left legs. After the first test, all athletes were educated about the hydration protocol. The hydration protocol was determined based on each athlete's sweat rate (ISR) and the training characteristics of each sports division. Then, all athletes underwent the training for two months. After that, the same tests were performed. The result showed that hydration protocol influenced the performance of muscle strength, endurance, and power. Therefore, the hydration protocol is influential in maintaining a good hydration status in athletes so that the athlete does not experience hypohydration which will later impair the athlete's muscle performance. Therefore, it is crucial to apply hydration protocols individually according to the training program (volume of training), not only in martial arts sports but in all sports.
Background and Aim: Food safety is an important aspect to be evaluated in preventing any potentially harmful side effects of food product such as yogurt. The purple sweet potato yogurt product was developed to combine the benefits of probiotic activities in yogurt and the bioactive effects of anthocyanin in purple sweet potato. This study was performed to investigate acute and sub-chronic oral toxicity of purple sweet potato yogurt (PSPY) in mice. Materials and Methods: Acute oral toxicity was evaluated by a 14-day observation for any clinical sign of toxicity on fifteen female balb/c mice following a single dosage of PSPY (nil, 2 or 5 g/kg body weight). The sub-chronic oral toxicity study was conducted by feeding PSPY to four groups of mice with the dose of 0, 12, 20, and 40 g/kg body weight for 28 days, and another group of mice receiving 40 g/kg body weight purple sweet potato for 14 days longer to observe any delayed toxicity effect. Body weight and clinical signs of toxicity were observed daily. Liver and kidney macroscopy and relative organ weight, liver histology, liver enzyme, and hematology profile analyses were done at the end of the study. Results: There were no signs of toxicity observed from the acute toxicity study and no abnormality in body weight, relative organ weight, and gross organ examination. In the sub-chronic toxicity study, there were no clinical signs of toxicity, no significant differences in body weight, relative liver weight, liver enzymes, hematology profile, or abnormality in gross and histological examination of the liver. Conclusion: This study shows that oral administration of PSPY in mice up to 5 g/kg body weight did not result in acute toxicity, while the dosage up to 40 g/kg body weight did not lead to sub-chronic toxicity.
Futsal is a variation of soccer, to be played on a smaller field, with the fastest development among other indoor sports. Futsal players need to master several basic playing techniques to be able to play good futsal, one of them is passing. There are 2 factors that affect futsal athlete skills; physical and mental factors, including cognitive factors. This study aimed to determine the contribution of physical and cognitive factors on the ability to execute passing techniques. A cross-sectional analytic study was conducted in October 2018 on 33 participants who were listed as futsal players in the Faculty of Medicine Futsal Unit, Universitas Padjadjaran, and in the amateur futsal club, La Coruna FC. Physical factor data consisting of body muscle mass percentage, leg muscle percentage, total body fat percentage, and legs subcutaneous fat percentage were measured using Body Impedance Analysis tool while the cognitive factors consisting of; attention, short term memory, and spatial ability, were measured using grid concentration test, digit span test, and spatial ability test, respectively. Athlete's passing ability was measured using 30 second pass and stop test. Data were then analyzed using regression analysis. The results showed that the percentage of leg muscles has the highest significance value for the athlete's passing ability. (β=0.6, p<0.05) while the leg muscles percentage and attention level are shown to be the physical and cognitive factors which play greater roles in the passing ability of futsal athletes. AbstrakFutsal adalah variasi sepakbola yang dimainkan di lapangan yang lebih kecil. Atlet futsal perlu menguasai beberapa teknik bermain dasar untuk bermain futsal dan salah satunya adalah passing. Ada 2 faktor yang memengaruhi keterampilan atlet futsal, yaitu fisik dan mental yang salah satunya adalah kognitif. Penelitian ini bertujuan mengetahui kontribusi faktor fisik dan kognitif terhadap kemampuan teknik passing. Studi analitik cross-sectional dilakukan terhadap 33 peserta yang terdiri dari atlet futsal Fakultas Kedokteran dan atlet futsal klub amatir, La Coruna FC selama Oktober 2018 di Jatinangor. Data komponen fisik terdiri atas persentase massa otot tubuh, persentase otot tungkai, persentase lemak tubuh total, dan persentase lemak subkutan kaki yang diukur dengan alat analisis impedansi tubuh, sedangkan kognitif terdiri atas konsentrasi, memori jangka pendek, dan kemampuan spasial yang masing-masing diukur dengan uji konsentrasi grid, uji rentang digit, dan uji kemampuan spasial. Kemampuan passing diukur menggunakan tes pass and stop selama 30 detik. Data kemudian diproses dengan analisis regresi. Hasil Analisis regresi menunjukkan persentase otot kaki memiliki nilai signifikansi tertinggi untuk kemampuan passing atlet. (β=0,6, p<0,05). Persentase otot tungkai dan tingkat konsentrasi adalah faktor fisik dan kognitif yang memiliki peran lebih besar dalam kemampuan passing atlet futsal Jatinangor.Kata kunci: Faktor fisik, faktor kognitif, futsal, passing MKB. 51(2):104-9 https://doi.
The Goldblatt method is one of several methods that can be used in making mouse model of hypertension. The principle of the Goldblatt method itself aims to cause renovascular hypertension by constricting renal blood vessels that results in hypoxic injury and consequently affects the RAAS (Renin-Angiotensin-Aldosterone System). This study aims to determine whether a modification to the Goldblatt method and an additional high salt consumption could be a more effective method in developing a mouse model of hypertension. This study was done on DDY strain mice with 4 weeks of age and 25-30 grams of weight. A simple ligation to constrict renal blood vessel was used as modification from the original Goldblatt 2K1C (two-kidney, one-clip) method. A total of 32 mice were randomized to receive either a modified Goldblatt, modified Goldblatt with salt diet, sham surgery only, or sham with salt diet. Blood pressure was measured at baseline, first week after intervention, and second week after intervention. The data was then analysed by repeated ANOVA method. Hematoxylin and eosin staining was used to analyse histology appearance. This study showed that using a high salt diet only-method generated a hypertensive state faster compared to the modified Goldblatt method, while the modified Goldblatt method produced a steadier increase of blood pressure. Statistically, there was a significant difference of blood pressure between the sham and salt diet group compared to the other three groups at the first week after intervention (p<0,05). The resulting blood pressure from all the methods used in this study was influenced by time. From all four interventions, it is concluded that the modified Goldblatt 2K1C arterial ligation method with an additional high salt consumption had an effect on mice blood pressure. It is prospective to use the salt intervention method for study of hypertension with a short-time period because its acute effect on the rise of diastolic blood pressure was more rapid than the other three groups. On the other hand, the ligation group produced a steadier increase in diastolic blood pressure, therefore might be effective to be used for study of hypertension in a long-time period.
Kurangnya zat gizi pada anak usia sekolah dalam waktu yang lama dapat berimplikasi pada terganggunya penambahan berat badan dan tinggi badan seorang anak yang sedang bertumbuh. Salah satu pemenuhan zat gizi harian yang penting adalah lewat kontribusi zat gizi Pangan Jajanan Anak Sekolah(PJAS) antara 15-20%.Penelitian ini bertujuan untuk mengetahui gambaran karakteristik status gizi (body mass index) dan tingkat pengetahuan PJAS pada anak sekolah dasar di Jatinangor.. Penelitian ini merupakan penelitian potong lintang deskriptif dengan menggunakan data primer melalui kuesioner dan pengukuran berat badan dan tinggi badan.Jumlah total sampling yang diambil sekitar 33 orang siswa kelas 4 SD Ciawi Jatinangor. Hasil penelitian menunjukkan sebagian besar siswa berada pada status gizi kurang (underweight) baik pada laki-laki maupun perempuan. Alasan terbesar para siswa memilih jenis makanan PJAS adalah karena rasanya enak dan harganya murah. Besaran uang saku yang mereka bawa setiap harinya tidak berkorelasi dengan ketrampilan mereka dalam menentukan jenis PJAS. Perlu kerjasama yang baik antara pihak sekolah, orangtua murid dan pedagang makanan di ingkungan sekolah untuk membentuk prilaku jajan yang baik dan self efficacy yang baik pada siswa. Kata kunci :Body Mass Index, karakteristik pengetahuan jajanan , pangan jajanan anak sekolah
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.