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THE EXAMINATION OF EXPLOSIVE LEG STRENGTH IN VOLLEYBALL
Views:445The goal of the volleyball game is for players to get the ball over the net to the opposite side, which they do by jumping up to score. The effectiveness of the jumps is mainly a function of the leg's acceleration. This ability also appears in executing tasks following a deep center of gravity defense. Our study primarily aims to collect tests to measure the rapid strength of legs and predict expected performance. Furthermore, we evaluate the reliability of the tests by reviewing studies analyzing the vertical jump of volleyball players. We grouped the tests into two main categories. We have processed laboratory tests (e.g., force plate, contact mat) and their associated motion analysis software and court tests (e.g., standing long jump, wall touch method). Combining the two groups of tests is essential to obtain relevant results.
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PHYSIOLOGICAL ASSESSMENT OF MOTORCYCLE RACERS FOR THE EVIDENCE-BASED TRAINING
Views:0Motorcycle racers are subjected to extreme physical and physiological stresses that can affect their performance. This research aimed to investigate physiological factors that may influence performance and to make recommendations for effective training design. Three international-level Hungarian motorcycle racers were studied in laboratory, competition, and race simulation environments. Their mean age was 20.33 years (± 2.3), sport age 15.66 years (± 3.78), body weight 73.9 kg (± 8.7), and height 1.78 m (± 0.1). Resting measurements, load tests, and track tests were performed during the study. To analyze exercise stress in competitive conditions, we used heart rate monitoring and lactate measurements during the final round of the 2024 World Endurance Championships and a track test in Hungary. The laboratory measurements identified three athletes with different fitness statuses, who demonstrated significant individual differences in both cardiovascular and metabolic load during racing. The results showed that the pilot with greater aerobic capacity had a higher relative heart rate and lower lactate levels, whereas the pilot with greater anaerobic capacity showed the opposite. This suggests that energy production processes differ between riders. Aerobic capacity primarily supports recovery and more economical energy production, while anaerobic fitness can provide the performance needed for high-intensity activities. Striking the right balance can be the key to optimizing riders' performance.
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CREATININE AND CREATINE KINASE RATIO IN BLOOD OF DIFFERENT BODY TYPES - A NEW APPROACH.
Views:446Purpose: The inconsistencies and variations of creatine kinase level due to modifiable and non-modifiable factors were the basis of this study. The aim was to find out the relationships between creatinine and creatine kinase in the blood of somatotypes.
Methods: The 122 males, aged 10 to 20 years, were classified according to their somatotypes. Somatotypes were measured by the ISAK method. By standard laboratory methods, creatinine and creatine kinase estimate. The IBM SPSS version 24 is used for calculation. One way ANOVA followed by post hoc tests was performed to compare the variables among the three groups (p<0.05).
Results: Creatinine level in the blood insignificantly deferred among the three somatotypes. The significant differences (p<0.05) were found in creatine kinase level in the blood and creatinine/creatine kinase ratio among the three dominant Somatotypes. Creatine Kinase was significantly higher in Ectomorphs (212 U/L) than Endomorphs. Ectomorphs and mesomorphs have crossed normal creatine kinase levels (35 -175 U/L). The creatinine/creatine kinase ratio was found highest in endomorphs and lowest in the ectomorphs and significantly differed in three Somatotypes.
Conclusion: Creatinine production remains the same, indicating production of Creatinine is independent of specific body types. A significant higher Creatine Kinase level in Ectomorphs over Endomorphs showed fat content was not associated with it. Significant differences in Creatinine / Creatine Kinase ratio among Somatotypes suggested its relevance between cellular and morphological relationships and might uses as biomarkers.
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IDENTIFICATION OF SPECIFIC SELECTION CRITERIA IN YOUNG BALL SPORT PLAYERS
Views:970Background: Our study aimed to analyze body composition and spiroergometric data of young (14-15 years) elite level ball sport players. We suggested three-ball sports (handball, soccer, and basketball) share common performance indicators, as rapid intermittent movements primarily characterize each ball sport.
Methods: We selected one-hundred and ten, handball (n=30), basketball (n=40), and soccer (n=40) players male and female from local clubs in Hungary. Seventy-nine males and thirty-one females participated in our study; their average age was 14.51 and 14.56, respectively.
They participated in laboratory testing; the protocol included a body composition analysis and spiroergometric tests. We measured body composition and physiological parameters utilizing an In Body 720 device and a standard Bruce treadmill protocol. Although we were aware of the Bruce protocol limitations in elite athletes, we choose this protocol as a safer alternative for younger inexperienced athletes.
Results and conclusions: We concluded that in young male soccer and basketball players, mean peak /load (W), peak/VE (l), peak/Vtex (l), peak/VO2 (ml/min), peak/VCO2 (ml/min), and peak/ O2 pulse (ml) data is a reliable indicator of the sport-specific performance. We may also suggest that in our male basketball and handball players' population, peak/Vtex (l) is the only variable, which is significantly different. Between groups of male handball and soccer players, peak/VO2/kg (ml/min) may be a valid performance indicator. Among female basketball and handball players, we found a significant difference in three performance variables: peak/Vtex (l), peak/VO2 (ml/min), and peak/ O2 pulse (ml).