Jumping Ability Research Articles

Fundamentals of beach volleyball blocking actions

Beach volleyball is spectacular with many rapid actions, agility moves, and high jumping. One of the key elements present in high-performance beach volleyball, having a decisive role in the defensive apparatus, is the blocking movements. This action is done mainly by the tallest player or with the most considerable jumping ability. A high blocking ability can facilitate the defensive movement of the player that is positioned in the back of the court. Blocking ability is facilitated by anticipation capacity, good sight, agility movement, and high jumping ability generated by solid legs. This paper analyses the fundamentals of blocking actions in beach volleyball, giving critical elements in executing a good and efficient block.

The Effect of the Barrierhops Training Method on the Volleyball Smash at SMA Negeri 5 Lebong

The purpose of this study was to determine the ability to jump on the smash of male students in volleyball extracurricular at SMAN 5 Lebong. The type of research used in this research is quasi-experimental. With a population of 30 and a sample of 30 students, the sampling technique used was total sampling. Data analysis technique using t test. As for the research results obtained by the Hypothesis Test tcount 15.15 in the rejection area Ho t table 2.048 in the rejection area Ho then Ha can be accepted. With a calculation percentage of 53% it can be concluded that there is an effect of Barrierhops training on the smash of male students in extracurricular volleyball at SMAN 5 Lebong. Based on the results of the research and discussion that have been described in the previous chapter, it can be concluded that the proposed hypothesis is accepted, namely that there is an effect of barrier hops training on the jumping ability of the male students in extracurricular volleyball at SMAN 5 Lebong. Plyometric training on the ability to jump smash, it can be concluded that there is a significant effect between the barrier hops exercise on the jumping ability of the male students in extracurricular volleyball at SMAN 5 Lebong.

Correlation between Uni-standing Balance Ability, Jumping Ability, and Anaerobic Lower Extremity Muscle Power of High School Taekwondo Players

Correlation between Uni-standing Balance Ability, Jumping Ability, and Anaerobic Lower Extremity Muscle Power of High School Taekwondo Players

Evolution of Explosive Strength Data in Youth Volleyball Players Before and After Pandemic

Study purpose. This study aims to verify if there are significant differences and which type of correlation is between anthropometric and jumping ability variables by testing a group (elite) of Italian volleyball players (under 16), just after a month of training, applying a specific protocol.
 Materials and methods. In all subjects, the following anthropometric and jumping ability parameters were assessed: height, weight, body mass index, height with a stretched arm (Reach1) and height with two extended arms (Reach2). The jumping ability was measured with the Squat jump (SJ) and Run-Up (RU) test. All data on anthropometric and jumping ability parameters were presented as mean and standard deviation (Mean ± SD).
 Results. The results of the jumping ability parameters (Squat Jump and Run-Up) showed significant differences between treatment initial-final: Run-Up with p = 0.000 and Squat Jump with p = 0.001; and these showed a higher correlation, especially the variables linked to the ability to jump, evident differences compared to the initial period of treatment.
 Conclusions. In high-level youth volleyball, the anthropometric and jumping ability profile is directly linked to the evaluation and continuous monitoring of physical qualities, and jumping ability becomes an important aspect for the control of performance.

Biomechanical Characteristics of Vertical Jumping of Preschool Children in China Based on Motion Capture and Simulation Modeling.

Vertical jumping is one of the basic motor skills, and it is an essential part of many sports. The main purpose of this paper is to investigate characteristics of vertical jumping of children. This paper uses a motion capture system, three-dimensional platforms, and a simulation modeling system to analyze the kinematics and dynamics performance of children’s vertical jumping. The compression time increases from 3 to 4 years old, and flight height and time increases with age and stage gradually. In the compression phase and pushing phase, the hip and knee joint play a major role; in the landing phase, the knee and ankle joint play a major role. Muscle forces are mainly affected by age, and the three types of muscle force had two different trends. The muscle force of the shank and thigh increased with age, and the pelvic girdle muscles showed an “low–high–low” trend. The regression model suggests that the force of GMiP and the hip angular velocity have a great influence on jumping ability. Therefore, if we want to improve the jumping ability of preschool children, we should pay more attention to hip exercises. We should integrate the hip exercises into interesting games, which are more in line with their physical and mental health.

Effects of High-Intensity Interval Training With Specific Techniques on Jumping Ability and Change of Direction Speed in Karate Athletes: An Inter-individual Analysis.

This study investigated the effect of 4weeks of high-intensity interval training (HIIT) with specific techniques and analyzed inter-individual variability [classified in responders (Rs) and non-responders (NRs)] on jumping ability and change of direction speed (CODS) in youth karate athletes. Athletes of both genders (n=10) were randomly assigned into experimental group (EG; n=5) and the control group (CG; n=5). The EG trained 2–3days per week applying HIIT (three rounds [15 sets of 4s all-out specific efforts with 8s of dynamical pauses] with 3min of recovery between rounds) during their usual training during 4weeks. Assessments included squat jump (SJ) and countermovement jump (CMJ) and CODS by T-test. No significant interaction effect group by time was found. Although, in percentage and effect size (ES) terms increases were reported in both groups for SJ (EG: 15.2%, ES=0.91 vs. CG: 12.4%, ES=0.02) and only in EG for the T-test (−1.7%; ES=−0.35). In turn, a trend toward a higher proportion of Rs was observed in the EG (40% Rs) vs. CG (20% Rs) for SJ and CODS, respectively. In conclusion, the addition to regular training of a HIIT with specific techniques and based on the temporal combat structure after 4weeks was not a sufficient stimulus to increase jumping ability and CODS in karate athletes.

Korelasi Kekuatan Otot Tungkai dan Kekuatan Otot Punggung dengan Tinggi Lompatan pada Pemain Bola Voli Putri Koni Kota Blitar 2021

This study aims to determine the relationship between leg muscle strength (X1), back muscle strength (X2) and jump height (Y) in KONI Volleyball Players in Blitar City. The result of the calculation between each independent and dependent variable above, which is interpreted between the independent variable and the dependent variable, where the calculation is operated manually using Microsoft Excel, it is known that the overall correlation coefficient value is rX1Y = 0.975, and rX2Y = 2,933 rtable = 0.632 and rX1.2Y = 1.927. From the results of the analysis of the weight of the predictor contribution and the results of the correlation coefficient of each independent variable with the dependent variable, it turns out that the independent variable of back muscle strength (X2) in this study has a greater contribution weight when compared to the independent variable of leg muscle strength (X1) with the dependent variable is the high jumping ability of female volleyball athletes (Y).

Effects of Introducing Rest Intervals in Functional Fitness Training

Background: Functional Fitness Training (FFT) is a new exercise modality prioritizing functional multi-joint movements executed at high intensity as a circuit. Objective: To examine the impacts of introducing rest intervals in a FFT workout compared to “rounds for time” (RFT) FFT. Materials and Methods: Participants were 25 resistance-trained adults who completed two FFT workouts 1 week apart. The study design was crossover such that in a given session half the participants completed the standard and the other half the adapted FFT (FFTadapted). The workouts consisted of the same exercises (circuit of four rounds of exercises), but one (FFTadapted) included preset rest intervals (three sets of 1 min after each completed round). Before and after the workouts, countermovement jump ability and blood lactate were measured. Heart rate (HR) and ratings of perceived exertion (RPE) were measured post-exercise. Results: For both the standard and adapted protocols, mean HR was 90% age-predicted maximum. Final RPE was also similar for both workouts (~15–15.5) and indicated a “hard” work intensity. Both FFTs took the same time to complete (~13 min). Furthermore, no significant differences were observed in jump ability between FFTs. In contrast, lactate (15.11 ± 3.64 vs. 13.48 ± 3.64 mmol·L−1, p < 0.05), measured 3 min post-exercise, was significantly lower in FFTadapted. Conclusions: In FFTadapted, there was a significant reduction in RPE and blood lactate concentrations after exercise, while there were no significant differences in either HR or jumping ability, compared to a FFT workout in RFT methodology.

Jumping performance and take-off efficiency correlation with the basic anthropometric parameters in female volleyball players

Background: Vertical jump height and body height are almost universally recognised as determinant factors in elite volleyball performance. Objective: The purpose of this study was to assess the correlation between basic anthropometric parameters (body height and body weight) and jumping performance in a group of 16 female volleyball players (age 19.14 ± 5.52 years, height 1.80 ± 0.06 m, weight 69.81 ± 6.85 kg) and in a control group of 15 female university students (age 22.90 ± 0.83 years, height 1.70 ± 0.05 m, weight 61.70 ± 8.23 kg). Methods: The Quattro Jump 9290BA force platform system (Kistler, Winterthur, Switzerland) was used to test jumping performance in single vertical jumps (squat jump, countermovement jump) and 45-s continuous jumps. In single jumps, jump height was analysed and during the 45-s continuous jumps the maximal and mean jump height, the average contact time and the fatigue index were evaluated. The efficiency of the conversion of mechanical work into mechanical energy at the moment of take-off was calculated. Results: No significant influence of body height and body weight was found in the jumping performance in the squat jump and countermovement jump. In continuous jumps, a significant correlation was found between body height and fatigue index in the volleyball players. In the control group, in most of the tests moderate correlation between body height and jump height was observed. In the volleyball players, rather low values of efficiency of take-off (23.67 ± 2.64%) were calculated. The values in the control group were even lower. Conclusions: Nowadays, many volleyball coaches choose individuals mainly according to body height, but it is important that the talent identification process should also consider jumping abilities in the simple jumps and in continuous jumps. All these parameters should help coaches choose the right players for the appropriate position and role in the team.

Vertical Jumping by a Legged Robot With Upper and Lower Leg Bi-Articular Muscle–Tendon Complexes

The bi-articular muscle-tendon complex (MTC) in an animal's leg allows a transfer of mechanical power between adjacent joints and exertion of a large force at the toes. It is capable of storing and releasing elastic energy efficiently during motions. In our previous studies, we proposed mechanisms of the bi-articular MTC for achieving extension of the upper and lower parts of the leg and experimentally demonstrated that each mechanism allows the higher jumping motion of a legged robot. In this study, we developed a bio-inspired legged robot by integrating the upper and lower leg bi-articular MTCs and investigated the effect of their cooperative utilization on the improvement of the vertical jumping ability. A jumping motion trajectory was generated through optimization to maximize the jumping ability based on a dynamic model of the bio-inspired legged robot with these bi-articular MTCs. The simulation results of the models with and without bi-articular MTCs were compared. Finally, through jumping experiments performed by implementing the generated motion trajectory, it was confirmed that the jumping ability was improved by the cooperative utilization of those bi-articular MTCs.

PENGARUH METODE PEMBELAJARAN DRILL AND PRACTICE DAN DEMONSTRASI TERHADAP KEMAMPUAN LOMPAT JANGKIT DILIHAT DARI DAYA LEDAK OTOT TUNGKAI (Studi Eksperimen Pada Mata Pelajaran PJOK Kelas X SMA Negeri 1 Lahat)

This study aims to determine the effect of the Learning Method and Leg Muscle Explosion Power on Outbreak Skill Ability. The design used in this study was an experimental squasi with a 2 x 2 factorial design. The study population was all students of class X MIPA SMA Negeri 1 Lahat in the 2019-2020 Academic Year consisting of 4 classes. The class that was used as the sample of the experimental group was Class X MIPA 1 and the control class was Class X MIPA 2. The sample selection was carried out using a purposive random sampling technique. The collected data is processed statistically using a two-way variance (anava) analysis technique. The results showed that: (1) the jumping ability of students learning with the Drill and Practice learning method was higher than the jumping ability of students learning with the learning method Demonstration (2) the jumping ability of students who studied with higher leg muscle explosive power was higher than the jumping ability of students who learn with low limb muscle explosive power (3) There is no interaction between learning methods and leg muscle explosive power to jumping ability

Bio-Inspired Take-Off Maneuver and Control in Vertical Jumping for Quadruped Robot with Manipulator.

The jumping motion of legged robots is an effective way to overcome obstacles in the rugged microgravity planetary exploration environment. At the same time, a quadruped robot with a manipulator can achieve operational tasks during movement, which is more practical. However, the additional manipulator will restrict the jumping ability of the quadruped robot due to the increase in the weight of the system, and more active degrees of freedom will increase the control complexity. To improve the jumping height of a quadruped robot with a manipulator, a bio-inspired take-off maneuver based on the coordination of upper and lower limbs is proposed in this paper. The kinetic energy and potential energy of the system are increased by driving the manipulator-end (ME) to swing upward, and the torso driven by the legs will delay reaching the required peak speed due to the additional load caused by the accelerated ME. When the acceleration of ME is less than zero, it will pull the body upward, which reduces the peak power of the leg joints. Therefore, the jumping ability of the system is improved. To realize continuous and stable jumping, a control framework based on whole-body control was established, in which the quadruped robot with a manipulator was a simplified floating seven-link model, and the hierarchical optimization was used to solve the target joint torques. This method greatly simplifies the dynamic model and is convenient for calculation. Finally, the jumping simulations in different gravity environments and a 15° slope were performed. The jump heights have all been improved after adding the arm swing, which verified the superiority of the bio-inspired take-off maneuver proposed in this paper. Furthermore, the stability of the jumping control method was testified by the continuous and stable jumping.

Study Regarding the Development of Jumping Ability in Basketball Game

Abstract Modern basketball game is becoming more and more physical, and coaches have reoriented their view on building strong athletes with speed, strength, and accuracy. Jumping ability is used in many moves in basketball, from rebounding, defending, jump shoot, blocking till interception and offensive game. The vertical jump is the primary and essential skill in the jumping ability of a basketball player. Our research focused on the result of a questionnaire with 20 respondents that were coaches at different levels regarding the importance of vertical jump in the basketball game. The conclusions highlighted that vertical jump is considered necessary also for small players (point guard, shooting guard) and tall players (short forward, power forward, center), with emphasis on small players who have to compensate for their height with an excellent vertical jump; also the contribution of coordination and endurance, nutrition and appropriate rest periods can contribute decisively to the jumping ability. Also, between the methods of developing vertical jump was underlined the plyometric and circuit training.

Jumping ability is related to change of direction ability in elite handball players

PurposeThis study investigated the relationship between vertical and horizontal jumping ability and change of direction (COD) to measure athletic performance in 51 elite male handball players.Scope.Countermovement jump (CMJ), peak power, and standing long jump (SLJ) were measured. Participants performed a 20-m sprint test (time measured at 5, 10, and 20 m) and a zigzag test (COD: 135°, 90°, and 45°). The COD deficit, an index of the time required for COD, was calculated. The correlations between CMJ height and zigzag test times were relatively large (at 135°, r = − 0.607; at 90°, r = − 0.594; at 45°, r = − 0.613; p < 0.01), whereas those between CMJ height and COD deficit were moderate (at 135°, r = − 0.399, p < 0.01; at 90°, r = − 0.350, p < 0.05; at 45°, r = − 0.323, p < 0.05). SLJ showed a negative moderate correlation with COD deficit (at 135°, r = − 0.439, p < 0.01; at 90°, r = − 0.469, p < 0.01; at 45°, r = − 0.380, p < 0.01). ConclusionsThis study is the first to analyse SLJ ability and COD deficit parameters of handball players. We found that SLJ ability is moderately related to COD time and deficit; therefore, SLJ measurement may be a useful predictor of athletic performance.

Improved Salp Swarm Algorithm with Simulated Annealing for Solving Engineering Optimization Problems

Swarm-based algorithm can successfully avoid the local optimal constraints, thus achieving a smooth balance between exploration and exploitation. Salp swarm algorithm (SSA), as a swarm-based algorithm on account of the predation behavior of the salp, can solve complex daily life optimization problems in nature. SSA also has the problems of local stagnation and slow convergence rate. This paper introduces an improved salp swarm algorithm, which improve the SSA by using the chaotic sequence initialization strategy and symmetric adaptive population division. Moreover, a simulated annealing mechanism based on symmetric perturbation is introduced to enhance the local jumping ability of the algorithm. The improved algorithm is referred to SASSA. The CEC standard benchmark functions are used to evaluate the efficiency of the SASSA and the results demonstrate that the SASSA has better global search capability. SASSA is also applied to solve engineering optimization problems. The experimental results demonstrate that the exploratory and exploitative proclivities of the proposed algorithm and its convergence patterns are vividly improved.

Effect of ball inclusion on jump performance in soccer players: a biomechanical approach

ABSTRACT Objective In soccer, vertical jump means jumping toward a ball. Since no vertical jump test includes the ball as a reference element, the effect that the ball would have in a vertical jump test is unknown. The aim of this study was to examine the biomechanical differences between run-up vertical jump measurements without (Run-up Vertical Jump) and with ball inclusion (Heading Test). Methods Twelve semi- and professional soccer players were recruited. Athletes performed both jump tests in a biomechanical laboratory, where kinetic and spatiotemporal variables were collected and compared using a Student’s dependent t-test for paired samples. Results Overall, players performed a different jumping strategy during the heading test compared to the run-up vertical jump, exhibiting: 1) higher horizontal velocity during initial contact (+45.3%, P ≤ .001), 2) shorter contact time, greater rate of force development, and total impulse during push-off (+27.5%, +53%, and +10.6%, respectively, P ≤ .008), 3) higher CoM horizontal and resultant velocity during take-off (+76.1% and 20.5%, respectively, P ≤ .001), 4) better vertical jump performance (+4.3%, P ≤ .0001), and 5) larger body angle rotation during landing (+63.3%, P = .006), compared to run-up vertical jump (effect size: 0.78 to 3.7). Conclusion In general, soccer players display greater vertical jump heights in heading test, which highlights the importance of including an overhead ball during soccer-specific jump tests. Coaches and practitioners are encouraged to assess, and perhaps develop, the jumping ability of soccer players using a suspended ball as a specific target.

Sex Disparity in Bilateral Asymmetry of Impact Forces during Height-Adjusted Drop Jumps.

Side-to-side asymmetry of lower extremities may influence the risk of injury associated with drop jump. Moreover, drop heights using relative height across individuals based on respective jumping abilities could better explain lower-extremity loading impact for different genders. The purpose of the current study was to evaluate the sex differences of impact forces and asymmetry during the landing phase of drop-jump tasks using drop heights, set according to participants’ maximum jumping height. Ten male and ten female athletes performed drop-jump tasks on two force plates, and ground reaction force data were collected. Both feet needed to land entirely on the dedicated force plates as simultaneously as possible. Ground reaction forces and asymmetry between legs were calculated for jumps from 100%, 130%, and 160% of each participant’s maximum jumping height. Females landed with greater asymmetry at time of contact initiation and time of peak impact force and had more asymmetrical peak impact force than males. Greater values and shorter time after ground contact of peak impact force were found when the drop height increased to 160% of maximum jumping ability as compared to 100% and 130%. Females exhibited greater asymmetry than males during drop jumps from relative heights, which may relate to the higher risk of anterior cruciate ligament injury among females. Greater sex disparity was evident in impact force asymmetry than in the magnitude of peak impact force; therefore, it may be a more appropriate field-screening test for risk of anterior cruciate ligament injury.

STUDENTS’ PHYSICAL QUALITY "JUMPING" IN NON-PHYSICAL EDUCATION UNIVERSITIES

Students’ physical quality “jumping" in non-physical education university is discussed in the article. Complementary characteristics of "jumping ability" described by scientists in different years are given and literary sources of scientists on this problem are analyzed. The article provides the results of practical research based on the Abalakov’s test for measuring jumping ability among students at elective physical culture lessons and a comparative analysis of the test results is presented. Sport that shows the highest jumping ability as an important component of harmony in human motor actions is revealed. Activities at University sports clubs are recommended.

The “State of Art” of Mahanarva (Hemiptera: Cercopidae) research. An economically important New World spittlebug genus

This review outlines different aspects of Mahanarva spittlebugs and other South American cercopid pests, providing an overview of the “State of Art” of current research. Besides emphasizing how species damage plantations and how pest management can improve agricultural yields, other morphological, taxonomic, phylogenetic, and biogeographic aspects are explained. At an ecological level, the life cycle, the spittle produced by the nymphs, the jumping ability, communication, and oviposition are described. Moreover, areas with a lack of research are also highlighted. In covering all these topics, this work provides a great foundation for both beginners in the study of this group and experienced professionals.

Cooperation behavior of fore- And hindlimbs during jumping in Rana dybowskii and Xenopus laevis.

Frogs are characterized by their outstanding jumping ability, depending on the rapid extension of hindlimbs to propel their bodies into air. A typical jumping cycle could be broken into four phases: preparation, takeoff, flight, and landing. Considerable research has been performed to discuss the function of hindlimbs of frogs during takeoff phase, whereas the literature of limbs' motion in jumping between different species was limited. To profile the evolution of locomotion in anurans, it is necessary to investigate on the motion of fore‐ and hindlimbs of frogs within different taxa. In this work, we put forward a detailed description of jumping behavior of two frog species, Rana dybowskii and Xenopus laevis. High‐speed cameras were used to explore the movement of different joints in fore‐ and hindlimbs of these two animals, and kinematic analysis was operated to identify both homologous behaviors and significant differences between them. We found that the Rana dybowskii's fore‐ and hindlimbs had good cooperation during jumping, while the Xenopus laevis' uncooperative behavior in limbs may give a functional explanation for the deficiency in terrestrial jumping; besides, the R. dybowskii's landing followed the “hands‐belly‐feet slap” strategy, and Xenopus laevis had clumsy landing with “belly‐flops” sequence. The result gained here clarifies the cooperation behavior of anuran limbs and may supply a new insight into our understanding of the anuran's evolution.