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Antagonist Muscle Activation During Isometric Elbow Flexion at Varied Joint Angles: A Comparative Neuromuscular Analysis Between Volleyball Players and Sedentary Adults
Views:68Neuromuscular coordination enhances athletic performance and prevents injuries. Antagonist muscle activation during isometric movements, such as elbow flexion, is crucial for joint stability and efficiency. Volleyball-specific training may lead to distinct neuromuscular adaptations that differ from those of sedentary individuals. This study aims to investigate differences in antagonist activation patterns during isometric elbow flexion between volleyball players and sedentary adults, with a focus on neuromuscular control and the effects of co-contraction. Twenty-eight males (14 volleyball players and 14 sedentary individuals; ages 18–25) participated in the study. Surface electromyography (EMG) recorded biceps and triceps activity at 45°, 90°, and 120° elbow angles. Muscle activity, co-contraction indices (CCI), and perceived exertion (RPE) were statistically analyzed using descriptive statistics and two-way repeated measures Analysis of Variance. Bonferroni corrections assessed angle-specific effects. Significance levels (α) were set to 0.05 for all analyses. Athletes exhibited significantly higher biceps activation (mean EMGmax = 0.63 vs. 0.48) and lower triceps activation (mean EMGmax = 0.25 vs. 0.35, p < 0.001). Co-contraction (CCI) was lower among athletes (mean = 0.55 vs. 0.89). RPE scores were consistently lower in athletes (mean = 12.8 ± 1.6) compared to non-athletes (15.7 ± 1.5), indicating superior neuromuscular efficiency. Volleyball players demonstrated enhanced neuromuscular control, as evidenced by higher agonist activation, reduced antagonist activation, and lower co-contraction. The enhanced neuromuscular adaptations of volleyball players, likely resulting from consistent training, suggest improved movement mechanics and a reduced risk of injury. Future longitudinal studies are advised to explore causality and sport-specific neuromuscular changes.
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INVESTIGATION OF THE MOTIVATION OF THE SUPPORTERS IN VOLLEYBALL MATCHES IN THE EXAMPLE OF DEAC
Views:316In the present study, we investigated the motivation of people attending volleyball matches of the Debreceni Egyetemi Atlétikai Club. In our complex research, we investigate the passive sports consumption of teams competing in the spectator sports of the DEAC university club. The present study explicitly examines the spectatorship of volleyball, as we are curious to discover whether the followers of different sports show different motivations. The method chosen for the research was a questionnaire delivered online to the target audience using the snowball method. The resulting sample of 128 respondents was relevant to the opinions of 54 respondents. Based on our previous research, we hypothesized that one of the main motivation factors would be the game's beauty and the sport's aesthetics. Our hypothesis was confirmed; our study found that not only one of the main factors but the most important motivating factor is the beauty of the sport; as in the present study, the aesthetics and excitement of volleyball was the most important motivating factor for the respondents.
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THE EXAMINATION OF EXPLOSIVE LEG STRENGTH IN VOLLEYBALL
Views:322The 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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A STUDY ON WORD ASSOCIATION WHEN TEACHING THE THEORETICAL RULES OF VOLLEYBALL IN PHYSICAL EDUCATION
Views:716Physical Education as a subject – much like other subjects – has its own literary and educational content and the primary goal is the transference of that knowledge. In this respect, it is but one subject. At the same time it is unique, being the only subject dedicated to improving the body and the physique, yet “when we talk about the internal values of physical education, we only refer to its own literary and educational content. The meaning of this phrase includes the system of movement-based activities as well as the related intellectual knowledge” (RÉTSÁGI, 2011). During a Physical Education lesson students learn and practice movement-based activities, the importance of which is to improve their motor abilities, physical fitness (MÜLLER et al., 2013. MÜLLER et al., 2017) and mental health (BORBÉLY – MÜLLER, 2008). It may facilitate the prevention of numerous deformities or ailments, thus contributing to the preserving and of one’s health (MOSONYI et al., 2013., MÜLLER, 2015). For the past few years, multinational food companies (e.g. Danone and Nestlé) have also realized this, as they began to promote various programmes to support the regular physical activities of schoolchildren (RÁTHONYI – ODOR – RÁTHONYI, 2016). Physical Education in schools can only be considered effective if students come to appreciate and begin to feel the need for regular physical activities. For that purpose PE lessons are needed to be filled with content that is serious, requires effort (i.e. it should be a challenge that inspires improvement), but at the same time, it provides every student with feelings of success and enjoyment. This work, which at many times adapts to vastly different students (i.e. differentiates), is the duty of sports specialists and PE teachers (H. EKLER, 2013).
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COMPARATIVE ANALYSIS OF COGNITIVE ABILITIES STRESS TOLERANCE AND DECISION-MAKING PROCESS IN NOVICE AND EXPERIENCED ATHLETES
Views:794Introduction: Cognitive skills are essential in team sports. Perception, decision-making (tactical thinking, learning, attention, thinking, emotions), stress tolerance, and even the level of motor and technical-tactical skills all affect performance.
Objective: We found a significant difference in stress tolerance of novice / young and experienced team sport players (BALOGH, DONKA 2020). Our results showed that experienced athletes have higher level of stress tolerance. However, as this was a descriptive study, we intended to support our statement involving more number of subjects, and an analysis of cognitive abilities.
Method: A cross-sectional experimental study was performed on 41 male and 13 female team sport (handball, volleyball and football) players. We used the VTS DT software package for cognitive abilities and the MDE Heidelberg StressHolter (gastro, HR, TH, GSR) for stress measurement. During the 35-minute measurement process, a state of rest was measured in the first stage, a response to a 10-minute stress situation (VTS-DT for the cognitive test) in the second stage, and a state of rest and latency in the third stage.
Results: We found a significant relationship between stress tolerance and the cognitive ability of female and male participants. Our results demonstrated that football players had a lower level of stress tolerance than other team sport players. They also tent to make more mistakes in the VTS-DT test.
Conclusions: The classification into novice and experienced categories need to be done more uniformly in the future. We are aware of it, that the unequal number of participants by sports, is one of the limitations of our study. However, it is encouraging that significant results demonstrate a strong relationship between stress tolerance and the number of appropriate decisions. These results reveal other areas of research for us.