Journal articles: 'Vertical jumping'

1

Bobbert, Maarten F., and Gerrit Jan van Ingen Schenau. "Coordination in vertical jumping." Journal of Biomechanics 21, no. 3 (January 1988): 249–62. http://dx.doi.org/10.1016/0021-9290(88)90175-3.

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Kato, Daichi, Kazuma Sekiguchi, and Mitsuji Sampei. "C301 Vertical Jumping Motion Control for the Jumping Robot." Proceedings of the Symposium on the Motion and Vibration Control 2011.12 (2011): 560–65. http://dx.doi.org/10.1299/jsmemovic.2011.12.560.

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Cándido, Antonio, Antonio Maldonado, and Jaime Vila. "VERTICAL JUMPING AND SIGNALED AVOIDANCE." Journal of the Experimental Analysis of Behavior 50, no. 2 (September 1988): 273–76. http://dx.doi.org/10.1901/jeab.1988.50-273.

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Weiss, Lawrence W., George E. Relyea, Candi D. Ashley, and Robert C. Propst. "Predicting depth vertical jumping distance." Isokinetics and Exercise Science 7, no. 4 (October 1, 1998): 151–59. http://dx.doi.org/10.3233/ies-1998-0031.

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Sattler, Tine, Damir Sekulic, Vedran Hadzic, Ognjen Uljevic, and Edvin Dervisevic. "Vertical Jumping Tests in Volleyball." Journal of Strength and Conditioning Research 26, no. 6 (June 2012): 1532–38. http://dx.doi.org/10.1519/jsc.0b013e318234e838.

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Viitasalo, Jukka T., Tero Viljanen, and Urho Kujala. "Evaluation of vertical jumping tests." Journal of Biomechanics 22, no. 10 (January 1989): 1094. http://dx.doi.org/10.1016/0021-9290(89)90497-1.

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McLean, S. P., M. E. Hahn, P. F. Vint, and M. J. Holthe. "RESTRICTED STEP LENGTH IN VERTICAL JUMPING." Medicine & Science in Sports & Exercise 30, Supplement (May 1998): 27. http://dx.doi.org/10.1097/00005768-199805001-00154.

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Anderson, Frank C., and Marcus G. Pandy. "Elastic energy storage in vertical jumping." Journal of Biomechanics 25, no. 7 (July 1992): 697. http://dx.doi.org/10.1016/0021-9290(92)90307-m.

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9

Wyatt, T. A. "Floor excitation by rhythmic vertical jumping." Engineering Structures 7, no. 3 (July 1985): 208–10. http://dx.doi.org/10.1016/0141-0296(85)90049-5.

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McCaulley, Grant O., Prue Cormie, Michael J. Cavill, James L. Nuzzo, Zea G. Urbiztondo, and Jeffrey M. McBride. "Mechanical efficiency during repetitive vertical jumping." European Journal of Applied Physiology 101, no. 1 (May 26, 2007): 115–23. http://dx.doi.org/10.1007/s00421-007-0480-1.

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ISHIYAMA, Yuta, Yuya YAMAMOTO, Bin ZHANG, Atsuo TAKANISHI, and Hun-ok Lim. "Vertical Jumping Motion of One-Legged Jumping Robot with Pneumatic Actuators." Proceedings of Mechanical Engineering Congress, Japan 2018 (2018): G1500205. http://dx.doi.org/10.1299/jsmemecj.2018.g1500205.

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Maloney, Sean J., Joanna Richards, and Iain M. Fletcher. "A Comparison of Bilateral and Unilateral Drop Jumping Tasks in the Assessment of Vertical Stiffness." Journal of Applied Biomechanics 34, no. 3 (June 1, 2018): 199–204. http://dx.doi.org/10.1123/jab.2017-0094.

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This study sought to compare vertical stiffness during bilateral and unilateral drop jumping. Specifically, the intersession reliabilities and force-deformation profiles associated with each task were to be examined. On 3 occasions, following familiarization, 14 healthy males (age: 22 [2] y; height: 1.77 [0.08] m; and body mass: 73.5 [8.0] kg) performed 3 bilateral, left leg and right leg drop jumps. All jumps were performed from a drop height of 0.18 m on to a dual force plate system. Vertical stiffness was calculated as the ratio of peak ground reaction force (GRF) to the peak center of mass (COM) displacement. Unilateral drop jumping was associated with higher GRF and greater COM displacement (both Ps < .001), but vertical stiffness was not different between tasks when considering individual limbs (P = .98). A coefficient of variation of 14.6% was observed for bilateral vertical stiffness during bilateral drop jumping; values of 6.7% and 7.6% were observed for left and right limb vertical stiffness during unilateral drop jumping. These findings suggest that unilateral drop jumps may exhibit greater reliability than bilateral drop jumps while eliciting similar vertical stiffness. It is also apparent that higher GRFs during unilateral drop jumping are mitigated by increased COM displacement.

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Hatze, Herbert. "Validity and Reliability of Methods for Testing Vertical Jumping Performance." Journal of Applied Biomechanics 14, no. 2 (May 1998): 127–40. http://dx.doi.org/10.1123/jab.14.2.127.

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The validity and reliability of the jumping ergometer method for evaluating performance in two-legged vertical countermovement and serial rebound jumps were investigated. The internal segmental and nonvertical energy flow components for drop jumps were also studied. The exact dynamic equations governing the jumping motion in three dimensions were derived and used together with the approximate relations of the jumping ergometer method to evaluate a total of 72 vertical jumps of different types executed by 22 subjects (15 males, 7 females), average age 24.59 years. The force-plate method was selected as a reference procedure, to which the jumping ergometer results were related. For countermovement jumps, the relative error for jumping height was 3.55% (±2.92%), and for average power per kilogram body mass during the propulsion phase it was 23.79% (±4.85%). For serial rebound jumps, the respective errors were 7.40% (±4.58%) and 5.09% (±4.48%). Internal and nonvertical energy flow components amounted to about 3% of the total. It was concluded that, because of a number of invalid assumptions, unpredictable errors, and contradictory performance requirements, the validity and reliability of the jumping ergometer method for evaluating certain aspects of athletic performance are highly questionable.

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Zhu, Zi Xin. "Kinematic Mechanics Analysis of Takeoff in Pre-Jumping for Sports Aerobics." Advanced Materials Research 1014 (July 2014): 157–60. http://dx.doi.org/10.4028/www.scientific.net/amr.1014.157.

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Takeoff is important to a variety of difficult movements for sports aerobics. The paper analyzes the kinematic mechanics of takeoff in pre-jumping for the sport. It first discusses the importance of takeoff in sports aerobics, and finds that the mechanics theory can be utilized to analyze the forces produced in the process of takeoff. Then, the dynamics analysis of takeoff in pre-jumping is completed to reveal the change of the vertical force and expound the sports process from the aspect of mechanics. Subsequently, the body for the athlete is simplified a two-light-pole mechanical model. On the basis of this, the mechanics analysis of vertical force in pre-jumping is done to find the influencing factors for vertical force. The results show that the vertical force produced by the takeoff in pre-jumping suffers from the factors of the weight, length of leg, bending angle of knee, and angular speed of leg rotation, etc.

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15

Oddsson, L., and A. Thorstensson. "JUMPING PERFORMANCE IN ELITE ATHLETES - APPLICATION OF ATEST PREDICTING VERTICAL JUMPING ABILITY." Medicine & Science in Sports & Exercise 24, Supplement (May 1992): S104. http://dx.doi.org/10.1249/00005768-199205001-00623.

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Baus, Juan, John R. Harry, and James Yang. "Optimization-based subject-specific planar human vertical jumping prediction: Model development and validation." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 235, no. 7 (April 16, 2021): 805–18. http://dx.doi.org/10.1177/09544119211010924.

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Jumping biomechanics may differ between individuals participating in various sports. Jumping motion can be divided into different phases for research purposes when seeking to understand performance, injury risk, or both. Experimental-based methods are used to study different jumping situations for their capabilities of testing other conditions intended to improve performance or further prevent injuries. External loading training is commonly used to simulate jumping performance improvement. This paper presents the optimization-based subject-specific planar human vertical jumping to develop the prediction model with and without a weighted vest and validate it through experiments. The skeletal model replicates the human motion for jumping (weighting, unweighting, breaking, propulsion) in the sagittal plane considering four different loading conditions (0% and 10% body mass): unloaded, split-loaded, front-loaded, and back-loaded. The multi-objective optimization problem is solved using MATLAB® with 35 design variables and 197 nonlinear constraints. Results show that the model is computationally efficient, and the predicted jumping motion matches the experimental data trend. The simulation model can predict vertical jumping motion and can test the effect of different loading conditions with weighted vests and arm-swing strategy on the ground reaction forces. This work is novel in the sense that it can predict ground reaction forces, joints angles, and center of mass position without any experimental data.

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Goldman, Marjorie, Alexander J. Skolnick, Teresa P. Hernandez, and Ethel Tobach. "Distance Perception in the Spiny Mouse Acomys Cahirinus: Vertical Jumping." Perceptual and Motor Skills 75, no. 3 (December 1992): 883–95. http://dx.doi.org/10.2466/pms.1992.75.3.883.

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Acomys cahirinus, a precocial muroid, that has shown precise jumping in the natural habitat, did not jump from 25 cm in a laboratory situation. To investigate this further, A. cahirinus were observed jumping from platforms at two different heights, onto different sized checkered substrates and from a visual cliff. Adult animals discriminated between platforms that were 6.4 cm and 25.4 cm above the substrate and between small and large checkered patterns on the floor. Most adult animals and neonates jumped down on the shallow side of the visual cliff. Animals developed individual patterns of jumping over a series of trials, with some jumping often, some rarely, and others jumping only from the low platform. Good distance perception was indicated when they did not jump from heights, and by their making appropriate postural adjustment when they did jump from heights and landed without mishap. Different spacing of trials indicated that height was a more effective stimulus for animals which had all four conditions on the same day, while floor pattern was more effective for animals with each of the four conditions on a separate day.

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18

Ho, Thanhtam, and Li Li Xin. "Design of a Piezoelectrically Actuated Jumping Robot." Advanced Materials Research 311-313 (August 2011): 2211–14. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.2211.

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This paper presents the design and simulation of a mesoscale robot that can jump vertically. The robot uses the vibration of a piezocomposite actuator named LIPCA. A ratchet mechanism is designed to convert the vertical vibration to angular displacement. Then the displacement is transferred to a pair of links such that a spring is compressed. The elastic energy of spring is used to make the robot jump vertically. Simulation results verify that the robot can jump as high as about three times its body height.

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Kirby, Tyler J., Jeffrey M. McBride, Tracie L. Haines, and Andrea M. Dayne. "Relative Net Vertical Impulse Determines Jumping Performance." Journal of Applied Biomechanics 27, no. 3 (August 2011): 207–14. http://dx.doi.org/10.1123/jab.27.3.207.

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The purpose of this investigation was to determine the relationship between relative net vertical impulse and jump height in a countermovement jump and static jump performed to varying squat depths. Ten college-aged males with 2 years of jumping experience participated in this investigation (age: 23.3 ± 1.5 years; height: 176.7 ± 4.5 cm; body mass: 84.4 ± 10.1 kg). Subjects performed a series of static jumps and countermovement jumps in a randomized fashion to a depth of 0.15, 0.30, 0.45, 0.60, and 0.75 m and a self-selected depth (static jump depth = 0.38 ± 0.08 m, countermovement jump depth = 0.49 ± 0.06 m). During the concentric phase of each jump, peak force, peak velocity, peak power, jump height, and net vertical impulse were recorded and analyzed. Net vertical impulse was divided by body mass to produce relative net vertical impulse. Increasing squat depth corresponded to a decrease in peak force and an increase in jump height and relative net vertical impulse for both static jump and countermovement jump. Across all depths, relative net vertical impulse was statistically significantly correlated to jump height in the static jump (r= .9337,p< .0001, power = 1.000) and countermovement jump (r= .925,p< .0001, power = 1.000). Across all depths, peak force was negatively correlated to jump height in the static jump (r= –0.3947,p= .0018, power = 0.8831) and countermovement jump (r= –0.4080,p= .0012, power = 0.9050). These results indicate that relative net vertical impulse can be used to assess vertical jump performance, regardless of initial squat depth, and that peak force may not be the best measure to assess vertical jump performance.

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Challis, John H., and Zachary J. Domire. "Insights to vertical jumping from computer simulations." Movement & Sport Sciences 90, no. 4 (2015): 69. http://dx.doi.org/10.3917/sm.090.0069.

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Lim, Hyoung-Won. "Does Kinesio Taping Improve Vertical Jumping Performance?" Journal of Korean Physical Therapy 28, no. 5 (October 30, 2016): 269–73. http://dx.doi.org/10.18857/jkpt.2016.28.5.269.

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Umberger, B. R., A. Nagano, and K. G. M. Gerritsen. "PREDICTING MUSCLE POWER IN SIMULATED VERTICAL JUMPING." Medicine & Science in Sports & Exercise 33, no. 5 (May 2001): S221. http://dx.doi.org/10.1097/00005768-200105001-01249.

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23

Scholz, M. N. "Modeling vertical jumping in bonobo (pan paniscus)." Journal of Biomechanics 39 (January 2006): S55. http://dx.doi.org/10.1016/s0021-9290(06)83102-7.

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Challis, John H., and Zachary J. Domire. "Insights to vertical jumping from computer simulations." Movement & Sport Sciences - Science & Motricité, no. 90 (January 10, 2013): 69–78. http://dx.doi.org/10.1051/sm/2012038.

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Domire, Zachary J., and John H. Challis. "Maximum height and minimum time vertical jumping." Journal of Biomechanics 48, no. 11 (August 2015): 2865–70. http://dx.doi.org/10.1016/j.jbiomech.2015.04.021.

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Babič, J., and D. Omrčen. "ACHILLES TENDON STIFFNESS OPTIMIZATION FOR VERTICAL JUMPING." Journal of Biomechanics 40 (January 2007): S304. http://dx.doi.org/10.1016/s0021-9290(07)70300-7.

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Pomohaci, Marcel, and Ioan Sabin Sopa. "Study Regarding the Development of Jumping Ability in Basketball Game." Land Forces Academy Review 26, no. 3 (September 1, 2021): 198–208. http://dx.doi.org/10.2478/raft-2021-0027.

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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.

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Burkett, Lee N., Joana Ziuraitis, and Wayne T. Phillips. "The Effect of Four Different Warm-Ups on the Maximum Vertical Jump Test Scores for Female College Athletes." Women in Sport and Physical Activity Journal 10, no. 2 (October 2001): 83–93. http://dx.doi.org/10.1123/wspaj.10.2.83.

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The effectiveness of two specific and two non-specific warm-ups on the vertical jump test for female athletes was the focus of this research. The four warm-up procedures were: (a) weighted jumping (WT), (b) submaximal vertical jumping (SUB), (c) stretching (ST), and (d) no warm-up (NW). To control for learning and fatigue, a counter-balanced design was used to test all participants over four different days. Thus all groups were tested in a predetermined order. Participants were 15 university female athletes (age 18 to 23 years). After warming up using one of the four warm-up procedures, three vertical jumps were measured and the best score was used for analysis. A single factors repeated measure analysis of variance and LSD post hoc tests revealed that the weighted jump warm-up procedure was statistically superior (p<0.01) to all other warm-up procedures. No warm-up was statistically inferior to all other warm-ups and submaximal vertical jumping was not statistically different than stretching. It was concluded; (a) performing a warmup is better than no warm-up, and (b) utilizing a weighted resistance-jumping warm-up will produce the highest scores when performing the vertical jump test for female athletes.

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Toepker, Terrence. "Jumping Off a Merry-Go-Round." Physics Teacher 60, no. 3 (March 2022): 176–78. http://dx.doi.org/10.1119/5.0023995.

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How many vertical jumps does it take to jump off of a rotating merry-go-round (MGR)? The answer is hidden in the expression: r n = r0 (1 + β2) n/2. When you make a vertical jump on a train moving on a straight line at constant speed (inertial frame), you land on the same spot. Not so on a MGR!

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Kim, Myeongjin, Bongsub Song, and Dongwon Yun. "Study on the Compact Balance Control Mechanism for Guinea Fowl Jumping Robot." Electronics 11, no. 8 (April 8, 2022): 1191. http://dx.doi.org/10.3390/electronics11081191.

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We developed a guinea fowl jumping robot with a one-axis momentum wheel mechanism with a passive hallux model. The Guinea fowl jumping robot was able to perform stable vertical jumping due to the linkage structure designed as a passive hallux model. Furthermore, we used the one-axis momentum wheel mechanism in the jumping robot for making the compact balance control mechanism that can control the body angle of the robot. Through the experiment, the conventional jumping robot uses the inertial tail to adjust the body angle in the air for stable landing and jumping. However, in the case of an inertial tail, it has a large volume and has a disadvantage in that stability is highly reduced when it collides with obstacles due to the shape of the inertial tail. Moreover, we performed a theoretical analysis, simulation, and experiment to verify the performance of the momentum wheel mechanism, and we confirmed that the passive hallux structure contributed to the jumping stability. Besides, we proved that the momentum wheel could adequately land on the ground by adjusting the body angle after vertical jumping. In addition, we demonstrated that the stability of the momentum wheel is higher than the inertial tail through collision simulation.

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Santos, Carlos A. F., Gislene R. Amirato, Alessandro F. Jacinto, Ana V. Pedrosa, Adriana Caldo-Silva, António R. Sampaio, Nuno Pimenta, Juliana M. B. Santos, Alberto Pochini, and André L. L. Bachi. "Vertical Jump Tests: A Safe Instrument to Improve the Accuracy of the Functional Capacity Assessment in Robust Older Women." Healthcare 10, no. 2 (February 8, 2022): 323. http://dx.doi.org/10.3390/healthcare10020323.

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Age-related decreases in muscle function lead to disabilities and are associated with negative health outcomes in older people. Although several physical tests can be used to assess physical performance, muscle strength, and power, their interpretation can be hampered by the ceiling effect of some of them. The aim of this study was to assess whether vertical jump tests are safe in terms of physical integrity and whether they are useful in assessing physical performance in forty-one robust older women. The investigation entailed an assessment of anthropometric characteristics, physical functioning tests (Short Physical Performance Battery (SPPB), sit-to-up 5 times and sit-to-up 30 s, gait speed, time-up-to-go test (TUGT)), and tests evaluating muscle strength and power (handgrip, lower limb isokinetic tests, and vertical jumping tests). Significant negative correlations were found between vertical jumping tests and BMI, body fat percentage, sit-to-up 5 times and TUGT. In addition, significant positive correlations were observed between vertical jumping tests and SPPB, gait speed, handgrip, and concentric isokinetic tests of knee muscles. No adverse events in volunteers’ physical integrity were reported during and after the performance of all physical tests. Thus, the study results showed that vertical jumping tests are safe and accurate for assessing physical performance and are useful for monitoring age-related loss of muscle performance in robust older women.

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Zhao, Panchao, Zhongqiu Ji, Ruixiang Wen, Jiahui Li, Xiao Liang, and Guiping Jiang. "Biomechanical Characteristics of Vertical Jumping of Preschool Children in China Based on Motion Capture and Simulation Modeling." Sensors 21, no. 24 (December 15, 2021): 8376. http://dx.doi.org/10.3390/s21248376.

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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.

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Wang, Jiaoqin, Honghao Fu, QiangZhang, Ming Zhang, and Yongzhao Fan. "Effect of Leg Half-Squat Training With Blood Flow Restriction Under Different External Loads on Strength and Vertical Jumping Performance in Well-Trained Volleyball Players." Dose-Response 20, no. 3 (July 2022): 155932582211236. http://dx.doi.org/10.1177/15593258221123673.

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Purpose To examine the effect of blood flow restriction resistance training under different external loads on the muscle strength and vertical jumping performance in volleyball players. Methods 18 well-trained collegiate male volleyball players were randomly divided into 3 groups: high-load resistance training group (HL-RT, 70% 1RM, n = 6), low-load blood flow restriction resistance training group (LL-BFR-RT, 30% 1RM, 50% arterial occlusion, n = 6), and high-load blood flow restriction resistance training group (HL-BFR-RT, 70% 1RM, 50% arterial occlusion, n = 6). Participants performed leg half-squat exercise 3 times per week for 8 weeks. Measurements of Isokinetic peak torque of knee extension and flexion, 1RM leg half-squat, squat jump, and 3 footed take-off were obtained before and after training. A two-way repeated-measures analysis of variance was used to examine differences among the 3 groups and between the 2 testing time (pre-test vs post-test). Results (1) The HL-RT group was significantly greater in muscle strength than that in the LL-BFR-RT group ( P < .05), but no improvement in vertical jumping performance ( P >.05). (2) Improvement in muscle strength and vertical jumping performance was significantly greater in the HL-BFR-RT group than that in the LL-BFR-RT group ( P <.05). (3) The HL-BFR-RT group had greater but not significant improvement in muscle strength and vertical jumping performance than that in the HL-RT group. Conclusions Although increases in muscle strength were observed between training groups, HL-BFR-RT increased not only muscle strength but vertical jumping performance to a greater extent compared to LL-BFR-RT and HL-RT.

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Pääsuke, Mati, Jaan Ereline, and Helena Gapeyeva. "Knee Extensor Muscle Strength and Vertical Jumping Performance Characteristics in Pre- and Post-Pubertal Boys." Pediatric Exercise Science 13, no. 1 (February 2001): 60–69. http://dx.doi.org/10.1123/pes.13.1.60.

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Knee extensor muscle strength and vertical jumping performance characteristics were compared between 14 pre-pubertal (11-year-old) and post-pubertal (16-year-old) boys. Post-pubertal boys had greater (p < .05) absolute values of maximal isometric force (MF) and rate of force development (RFD), absolute and body mass-related values of isokinetic peak torque of the knee extensor muscles at angular velocities of 60, 180, and 240° · s−1, as well as jumping height in squat, counter-movement, and drop jumps, than pre-pubertal boys. This study indicated an inability to use the positive effect of stretch-shortening cycle to vertical jumping performance in pre- and post-pubertal boys.

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Marinšek, Miha, and Mitija Samardžija Pavletič. "ASSOCIATION BETWEEN MUSCLES’ CONTRACTILE PROPERTIES AND JUMPING PERFORMANCE IN GYMNASTS." Science of Gymnastics Journal 12, no. 1 (February 1, 2020): 75–86. http://dx.doi.org/10.52165/sgj.12.1.75-86.

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This study examined the association between muscles’ contractile properties and jumping skill performance in gymnasts. Thirty-nine internationally experienced female (56%) and male (44%) gymnasts participated in the study. Radial displacement and contraction time of the biceps femoris, rectus femoris, vastus lateralis, vastus medialis, and erector spinae were collected to assess muscles’ contractile characteristics using tensiomyography (TMG). Additionally, peak power, jump height, vertical take-off velocity, and vertical peak force in squat jump, countermovement jump, and drop jump were recorded. The TMG parameters did not predict jumping performance in our sample of female and male gymnasts. Associations between TMG parameters and jumping performance are discussed in the article.

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Wannop, John, Nicole Schrier, Marie-Louise Wolter, Ryan Madden, Zach Barrons, and Darren Stefanyshyn. "Changes in Joint Power and Energetics during a Sport-Specific Jumping Fatigue Protocol." Applied Sciences 13, no. 3 (January 17, 2023): 1231. http://dx.doi.org/10.3390/app13031231.

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Kinematic and kinetic changes in the lower extremities occur as an athlete becomes fatigued during vertical jumping; however, the specifics of these changes are not well-understood. Therefore, the purpose of this study was to quantify the influence of a sport-specific, vertical jumping fatigue protocol on the biomechanics of the ankle, knee, and hip joint. Twenty male varsity athletes performed repetitive standing countermovement squat jumps every 20 s until fatigued (vertical jump and reach height decreased to 88% of their maximum height for three consecutive jumps). The kinematics and kinetics of their lower extremities (ankle, knee, and hip) were quantified, and the ankle, knee, and hip joint’s moments, angular velocity, and joint power were compared. The participants performed an average of 175 jumps before they were classified as being fatigued. When they became fatigued, the peak power of the ankle and hip joints were substantially reduced due to a decrease in the angular velocity at both joints. Ankle and hip joint moments were unchanged. Peak power at the knee joint was also unchanged over the course of the jumping protocol. To maintain vertical jumping performance over the course of a game or to delay the influence of fatigue, training should be targeted at maintaining the angular velocity of the ankle and hip joints.

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Kang, Ru, Fei Meng, Lei Wang, Xuechao Chen, Zhangguo Yu, Xuxiao Fan, Ryuki Sato, Aiguo Ming, and Qiang Huang. "Bio-Inspired Take-Off Maneuver and Control in Vertical Jumping for Quadruped Robot with Manipulator." Micromachines 12, no. 10 (September 30, 2021): 1189. http://dx.doi.org/10.3390/mi12101189.

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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.

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Križaj, Jožef, Samo Rauter, Janez Vodičar, Vedran Hadžić, and Jožef Šimenko. "Predictors of vertical jumping capacity in soccer players." Isokinetics and Exercise Science 27, no. 1 (March 4, 2019): 9–14. http://dx.doi.org/10.3233/ies-182138.

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Bobbert, Maarten F. "Effects of Isometric Scaling on Vertical Jumping Performance." PLoS ONE 8, no. 8 (August 1, 2013): e71209. http://dx.doi.org/10.1371/journal.pone.0071209.

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Schoeman, Marlene, Ceri E. Diss, and Siobhan C. Strike. "Kinetic and Kinematic Compensations in Amputee Vertical Jumping." Journal of Applied Biomechanics 28, no. 4 (August 2012): 438–47. http://dx.doi.org/10.1123/jab.28.4.438.

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A unilateral transtibial amputation causes a disruption to the musculoskeletal system, which results in asymmetrical biomechanics. The current study aimed to assess the movement asymmetry and compensations that occur as a consequence of an amputation when performing a countermovement vertical jump. Six unilateral transtibial amputees and 10 able-bodied (AB) participants completed 10 maximal vertical jumps, and the highest jump was analyzed further. Three-dimensional lower limb kinematics and normalized (body mass) kinetic variables were quantified for the intact and prosthetic sides. Symmetry was assessed through the symmetry index (SI) for each individual and statistically using the Mann-WhitneyUtest between the intact and prosthetic sides for the amputee group. A descriptive analysis between the amputee and AB participants was conducted to explore the mechanisms of amputee jumping. The amputee jump height ranged from 0.09 to 0.24 m. In the countermovement, all ankle variables were asymmetrical (SI > 10%) and statistically different (p< .05) for the amputees. At the knee and hip, there was no statistical difference between the intact and prosthetic sides range of motion, although there was evidence of individual asymmetry. The knees remained more extended compared with the AB participants to prevent collapse. In propulsion, the prosthesis did not contribute to the work done and the ankle variables were asymmetrical (p< .05). The knee and hip variables were not statistically different between the intact and prosthetic sides, although there was evidence of functional asymmetry and the contribution tended to be greater on the intact compared with the prosthetic side. The lack of kinetic involvement of the prosthetic ankle and both knees due to the limitation of the prosthesis and the altered musculoskeletal mechanics of the joints were the reason for the reduced height jumped.

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Bobbert, M. F. "Simulation models of human vertical jumping: case settled?" Journal of Biomechanics 39 (January 2006): S55. http://dx.doi.org/10.1016/s0021-9290(06)83101-5.

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Tran, Tai T., Lee E. Brown, Jared W. Coburn, Scott K. Lynn, and Nicole C. Dabbs. "Effects of Assisted Jumping on Vertical Jump Parameters." Current Sports Medicine Reports 11, no. 3 (2012): 155–59. http://dx.doi.org/10.1249/jsr.0b013e31825640bb.

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Ozsoy, Burak, Jingzhou Yang, Bradley Howard, Zachary J. Domire, and Rhonda Boros. "Direct optimisation-based planar human vertical jumping simulation." International Journal of Human Factors Modelling and Simulation 2, no. 1/2 (2011): 47. http://dx.doi.org/10.1504/ijhfms.2011.041637.

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Goodwin, Peter C., Kobus Koorts, Richard Mack, Shunfu Mai, Matthew C. Morrissey, and David M. Hooper. "Reliability of leg muscle electromyography in vertical jumping." European Journal of Applied Physiology 79, no. 4 (April 1, 1999): 374–78. http://dx.doi.org/10.1007/s004210050523.

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Gonzalo-Skok, Oliver, Jorge Sánchez-Sabaté, Julio Tous-Fajardo, Alberto Mendez-Villanueva, Chris Bishop, and Eduardo Piedrafita. "Effects of Direction-Specific Training Interventions on Physical Performance and Inter-Limb Asymmetries." International Journal of Environmental Research and Public Health 19, no. 3 (January 18, 2022): 1029. http://dx.doi.org/10.3390/ijerph19031029.

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This study analyzed the effects of two different training programs on functional performance and inter-limb asymmetries in basketball players. Twenty-four elite youth basketball players were randomly assigned to a training program including variable unilateral horizontal movements (VUH, n = 12) or unilateral lateral movements (VUL, n = 12). Eccentric-overload training (EOT) was performed twice a week for a six-week period. Functional performance assessment included a countermovement jump test, unilateral multidirectional jumping tests (i.e., lateral, horizontal, and vertical), a rebound jump test, a limb symmetry index, a 25 m linear sprint test, and several change of direction (COD) tests. Within-group analysis showed substantial improvements in almost all functional tests in both groups (ES = 0.35–0.89). Furthermore, almost all jumping asymmetries were improved in both groups (ES = 0.38–0.69) except for vertical jumping asymmetry in VUL (ES = −0.04). Between-group analyses showed a substantial and possibly better performance in vertical jumping asymmetry and 5 m in VUH compared to that of VUL, respectively. In contrast, lateral jumping with left (ES = 1.22) and right leg (ES = 0.49) were substantially greater in VUL than in VUH. Specific force-vector training programs induced substantial improvements in both functional performance tests and inter-limb asymmetries, although greater improvements of lateral and horizontal variables may depend on the specific force vector targeted.

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Stupar, Radu‐Cristian, Gheorghe Monea, Cristian Șanta, and Ioana Alexandra Somâtcă. "Comparative Study on the Use of a Portable Alternative Method for Measuring High Jump in Men's Volleyball Game." Studia Universitatis Babeş-Bolyai Educatio Artis Gymnasticae 65, no. 3 (December 20, 2020): 115–22. http://dx.doi.org/10.24193/subbeag.65(3).26.

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"Hight jump is a very important skill in the modern volleyball game. The height of the vertical detachment can be measured in a variety of ways, from the most sophisticated (jumping platform, jumping mats) to those available to all (Sargent test, and Vertec). Through this study we followed the comparative analysis of an alternative method for measuring detachment on the spot, using the G-Vert device, with a device known and currently used by several federations for measuring vertical detachment. Following the application of the Counter-movement jump Test (CMJ) or Static Vertical Test (SVT) and Approach Vertical Test (AVT), the values obtained were recorded, analyzed, and compared using the Microsoft Xcel and IBM SPSS statistical processing and analysis programs. The results of the analysis show small differences between them, which attests to the G-Vert device, as a reliable device for measuring vertical detachment. The G-Vert device, in addition to the ability to record vertical detachment, gives us information about the gravitational force that is exerted on the body during the jump, and the force with which the detachment is performed on the spot, information that can be obtained by the jumping platform. Keywords: G-Vert, high jump, measurements, tests."

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Kollias, Iraklis, Vassilios Panoutsakopoulos, and Georgios Papaiakovou. "Comparing Jumping Ability Among Athletes of Various Sports: Vertical Drop Jumping From 60 Centimeters." Journal of Strength and Conditioning Research 18, no. 3 (August 2004): 546–50. http://dx.doi.org/10.1519/00124278-200408000-00027.

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Kollias, Iraklis, Vassilios Panoutsakopoulos, and Georgios Papaiakovou. "Comparing Jumping Ability Among Athletes of Various Sports: Vertical Drop Jumping From 60 Centimeters." Journal of Strength and Conditioning Research 18, no. 3 (2004): 546. http://dx.doi.org/10.1519/1533-4287(2004)18<546:cjaaao>2.0.co;2.

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MARUYAMA, Takeo, and Takumi SANO. "B3 The influence of arm swing on jumping and lower extremities in vertical jumping." Proceedings of the Symposium on sports and human dynamics 2010 (2010): 206–9. http://dx.doi.org/10.1299/jsmeshd.2010.206.

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Čaušević, Denis, Ensar Abazović, Semir Mašić, Amila Hodžić, Šemso Ormanović, Ivor Doder, Nedim Čović, and Rasim Lakota. "AGILITY, SPRINT AND VERTICAL JUMP PERFORMANCE RELATIONSHIP IN YOUNG BASKETBALL PLAYERS." Acta kinesiologica, N1 2021 (2021): 133–37. http://dx.doi.org/10.51371/issn.1840-2976.2021.15.1.16.

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This study aimed to examine the relation between agility, sprint ability, and vertical jump performance of young basketball players. Fifty (n=50) young basketball players (mean±SD: age = 12.63±0.95; height = 160.84±6.31 cm; body mass = 50.82±6.88 kg) participated in the study. The agility T-test and 505 test were assessed to determine agility, 10m and 20m sprint was measured to determine sprint ability and countermovement jump (CMJ) for jumping performance. The results of Pearson’s Product Moment Correlation analysis indicated large to very large relation between agility tests and sprint performance (r = 0.61 to 0.85); agility and jump performance (r = - 0.64 to - 0.67); sprint and jumping performance (r = -0.59 to -0.77). The results of the study suggest that agility, sprint, and jumping performance share common physical demands, therefore it is necessary to develop them during the training.

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Journal articles on the topic 'Vertical jumping'

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