Kinesiological Factors in Vertical Jump Performance: Differences among Individuals

Vargas, Aragón; Gross, M. Melissa

doi:10.1123/jab.13.1.24

Cited by 112 publications

(59 citation statements)

References 26 publications

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“…The HIGH group generated higher download velocity than the LOW group, with the mean peak downward velocity being 19.3% higher in the HIGH group. Several previous studies have linked an increase in downward velocity with an increase in jump performance (1,8,9,13), concluding that the peak eccentric velocity can be both a good predictor of performance and an indicator of the effectiveness of training. In addition, the results showed significant differences in all variables analyzed between the two groups during the eccentric phase and these differences were consistent with the concept that maximum jump performance is dependent on effective utilization of the eccentric phase.…”

Section: Discussionmentioning

confidence: 99%

Kinetic and Kinematic Analysis for Assessing the Differences in Countermovement Jump Performance in Rugby Players

Floría

Gómez-Landero

Suárez-Arrones³

et al. 2016

Journal of Strength and Conditioning Research

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The aim of this study was to ascertain the differences in kinetic and kinematic profiles between better and poorer performers of the vertical jump within a homogeneous group of trained adults. Fifty rugby players were divided into low scoring (LOW) and high scoring (HIGH) groups based on their performance in the vertical jump. The force, velocity, displacement, and RFD-time curves were analyzed in order to determine the differences between groups. The analysis of the data showed differences in all the patterns of the ensemble mean curves of the HIGH and LOW groups. During the eccentric phase, the differences in the HIGH group with respect to the LOW group were: Lower crouch position, higher downward velocity, and higher force and rate of force development during the braking of the downward movement. During the concentric phase, the HIGH group achieved higher upward velocity, higher force at the end of phase, and a higher position at take-off. The higher jump performances appear to be related to a more effective stretch-shortening cycle function which is characterized by a deeper and faster counter-movement with higher eccentric forces being applied to decelerate the downward movement leading to enhanced force generation during the concentric phase.Abstract Word Count: 198

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Section: Discussionmentioning

confidence: 99%

Kinetic and Kinematic Analysis for Assessing the Differences in Countermovement Jump Performance in Rugby Players

Floría

Gómez-Landero

Suárez-Arrones³

et al. 2016

Journal of Strength and Conditioning Research

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“…A drawback, however, is that the biomechanical analysis of force-time records may yield up to 30 separate, additional variables. 1,2 The greater insight into movement biomechanics may thus reduce the interpretability of the acquired information.…”

Section: Introductionmentioning

confidence: 99%

Reactive Strength Index Modified Is a Valid Measure of Explosiveness in Collegiate Female Volleyball Players

Kipp

Kiely

Geiser

2016

Journal of Strength and Conditioning Research

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Kipp, K, Kiely, MT, and Geiser, CF. Reactive strength index modified is a valid measure of explosiveness in collegiate female volleyball players. J Strength Cond Res 30(5): 1341-1347, 2016-The purpose of this study was to investigate the validity of the reactive strength index modified (RSImod) as a measure of lower body explosiveness. Fifteen female, National Collegiate Athletic Association Division I volleyball players performed vertical countermovement jumps (CMJs) while standing on a force plate. Each player performed 3 CMJs. The vertical ground reaction forces collected during each jump were used to calculate jump height, time to takeoff, time to peak force, peak force, peak rate of force development, and peak power; the latter 3 variables were all normalized to body mass. Reactive strength index modified was calculated as the ratio between jump height and NOT THE PUBLISHED VERSION; this is the author's final, peer-reviewed manuscript. The published version may be accessed by following the link in the citation at the bottom of the page. 2 time to take-off. All variables, except for jump height, were then entered a factor analysis, which reduced the input data into 2 factors: a force factor and a speed factor. Although RSImod loaded more strongly onto the force factor, further analysis showed that RSImod loaded positively onto both force and speed factors. Visual analysis of the Cartesian coordinates also showed that RSImod loaded into the quadrant of greater force and speed abilities. These results indicate that the construct of RSImod, as derived from CMJ force-time data, captures a combination of speed-force factors that can be interpreted as lower body explosiveness during the CMJ. Reactive strength index modified therefore seems to be a valid measure to study lower body explosiveness. Journal of Strength and Conditioning

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“…Average force applied to the jumper's center of mass and the distance over which this force is applied have a direct effect on the vertical takeoff velocity, which in turn influences jump height [8]. Given that force production is closely related to explosiveness and power [9,10], it is assumed that maximal and average force developed during a vertical jump will be correlated to RSImod.…”

Section: Introductionmentioning

confidence: 99%

Modified Reactive Strength Index in Adolescent Athletes Competing in Different Sports and Its Relationship with Force Production

Petridis¹,

Tróznai²,

Pálinkás³

et al. 2017

AJSSM

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The modified reactive strength index (RSImod) is used as a measurement of reactive strength and explosiveness. The main purpose of the current study was to assess RSImod in young athletes competing in various sports and to examine the relationship between RSImod and eccentric and concentric force and vertical displacement. Two-way ANOVA showed a significant main effect for sport group, but not for age group. Soccer (0.47±0.09 m/s) and basketball players (0.49±0.1 m/s) had significantly higher values than handball players (0.36±0.07 m/s) and rowers (0.35±0.07 m/s). Among the independent variables, average eccentric force had the strongest relationship with RSImod. In conclusion, RSImod differs between athletes from different sports, but not between athletes from different age groups in the examined age period. Also, RSImod is strongly associated mainly with the average eccentric force and secondarily with the average concentric force during the countermovement jump.

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Kinesiological Factors in Vertical Jump Performance: Differences among Individuals

Cited by 112 publications

References 26 publications

Kinetic and Kinematic Analysis for Assessing the Differences in Countermovement Jump Performance in Rugby Players

Kinetic and Kinematic Analysis for Assessing the Differences in Countermovement Jump Performance in Rugby Players

Reactive Strength Index Modified Is a Valid Measure of Explosiveness in Collegiate Female Volleyball Players

Modified Reactive Strength Index in Adolescent Athletes Competing in Different Sports and Its Relationship with Force Production

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