Evaluation of force and vertical jump performance in young swimmers with different force-time curve characteristics

The importance of vertical jump in sport fields and rehabilitation is widely recognized. Furthermore, Force-Time variables of vertical jump are factors affecting jumping height. Exclusive review of each of this variables, in eccentric and concentric phases, can lead to a specific focus on them during jumping exercises. So, the aims of his study were to a) reviewing the relationship between force-time curve variables of eccentric and concentric phases with jump height and b) description of this variables in Iran national youth volleyball players society. This is an observational study. 12 elite volleyball player (Male, Iran national youth volleyball players, 17±0.7 years) have participated in this study. Correlation between Force-Time variables - included peak force (PF), relative peak force (RPP), peak power (PP), average power (AP), relative peak power (RPP), and Modified Reactive Strength Index (MRSI) - in eccentric and concentric phases and ultimate jump height has been studied. Results showed that the average power (r=0.7) and relative peak force (r=0.75) of concentric phase and MRSI (r=0.83) have significant correlation with ultimate jump height (JH). Relative peak power and average power of concentric phase can massively effect Jump Height in sports like volleyball, which vertical jump is an integral part of them. Focus on both of these factors, which has been studied in this research, in training programs, can improve athlete jump performance significantly.

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Association Between Force-Time Curve Characteristics and Vertical Jump Performance in Trained Athletes

The Journal of Strength and Conditioning Research ◽

10.1519/jsc.0000000000000739 ◽

2015 ◽

Vol 29 (7) ◽

pp. 2045-2049 ◽

Cited By ~ 5

Author(s):

Mário C. Marques ◽

Mikel Izquierdo ◽

Daniel A. Marinho ◽

Tiago M. Barbosa ◽

Ricardo Ferraz ◽

...

Keyword(s):

Vertical Jump ◽

Time Curve ◽

Jump Performance ◽

Force Time

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Objective classification of countermovement jump force-time curve modality: within athlete-consistency and associations with jump performance

Sports Biomechanics ◽

10.1080/14763141.2021.1991995 ◽

2021 ◽

pp. 1-12

Author(s):

Helen Bayne ◽

John Cockcroft ◽

Aneurin Robyn ◽

Quinette Louw

Keyword(s):

Countermovement Jump ◽

Time Curve ◽

Jump Performance ◽

Objective Classification ◽

Force Time

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Identification of Kinetic and Temporal Factors Related to Vertical Jump Performance

Journal of Applied Biomechanics ◽

10.1123/jab.9.2.95 ◽

1993 ◽

Vol 9 (2) ◽

pp. 95-110 ◽

Cited By ~ 130

Author(s):

James J. Dowling ◽

Lydia Vamos

Keyword(s):

Vertical Jump ◽

Jump Performance ◽

Large Variability ◽

Force Application ◽

Body Weights ◽

High Maximum ◽

Predictor Model ◽

Force Time ◽

Vertical Jumps ◽

Single Predictor

Subjects performed maximum vertical jumps on a force platform to reveal whether resulting force-time curves could identify characteristics of good performances. Instantaneous power-time curves were also derived from the force-time curves. Eighteen temporal and kinetic variables were calculated from the force- and power-time curves and were compared with the takeoff velocities and maximum heights via correlation and multiple regression. The large variability in the patterns of force application between the subjects made it difficult to identify important characteristics of a good performance. Maximum positive power was found to be an excellent single predictor of height, but the best three-predictor model, not including maximum power, could only explain 66.2% of the height variance. A high maximum force (> 2 body weights) was found to be necessary but not sufficient for a good performance. Some subjects had low jumps in spite of generating high peak forces, which indicated that the pattern of force application was more important than strength.

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The Effect of Training with Weightlifting Catching or Pulling Derivatives on Squat Jump and Countermovement Jump Force–Time Adaptations

Journal of Functional Morphology and Kinesiology ◽

10.3390/jfmk5020028 ◽

2020 ◽

Vol 5 (2) ◽

pp. 28

Author(s):

Timothy J. Suchomel ◽

Shana M. McKeever ◽

John J. McMahon ◽

Paul Comfort

Keyword(s):

Training Program ◽

Vertical Jump ◽

Group Differences ◽

Specific Training ◽

Countermovement Jump ◽

Time Curve ◽

Squat Jump ◽

Specific Loading ◽

Force Time

The purpose of this study was to examine the changes in squat jump (SJ) and countermovement jump (CMJ) force–time curve characteristics following 10 weeks of training with either load-matched weightlifting catching (CATCH) or pulling derivatives (PULL) or pulling derivatives that included force- and velocity-specific loading (OL). Twenty-five resistance-trained men were randomly assigned to the CATCH, PULL, or OL groups. Participants completed a 10 week, group-specific training program. SJ and CMJ height, propulsion mean force, and propulsion time were compared at baseline and after 3, 7, and 10 weeks. In addition, time-normalized SJ and CMJ force–time curves were compared between baseline and after 10 weeks. No between-group differences were present for any of the examined variables, and only trivial to small changes existed within each group. The greatest improvements in SJ and CMJ height were produced by the OL and PULL groups, respectively, while only trivial changes were present for the CATCH group. These changes were underpinned by greater propulsion forces and reduced propulsion times. The OL group displayed significantly greater relative force during the SJ and CMJ compared to the PULL and CATCH groups, respectively. Training with weightlifting pulling derivatives may produce greater vertical jump adaptations compared to training with catching derivatives.

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Relationship Between Strength Characteristics and Unweighted and Weighted Vertical Jump Height

International Journal of Sports Physiology and Performance ◽

10.1123/ijspp.4.4.461 ◽

2009 ◽

Vol 4 (4) ◽

pp. 461-473 ◽

Cited By ~ 96

Author(s):

Jenna M. Kraska ◽

Michael W. Ramsey ◽

G. Gregory Haff ◽

Nate Fethke ◽

William A. Sands ◽

...

Keyword(s):

Body Mass ◽

Isometric Force ◽

Vertical Jump ◽

Force Plate ◽

Collegiate Athletes ◽

Practical Method ◽

Relative Strength ◽

Jump Height ◽

Time Curve ◽

Force Time

Purpose:To investigate the relationship between maximum strength and differences in jump height during weighted and unweighted (body weight) static (SJ) and countermovement jumps (CMJ).Methods:Sixty-three collegiate athletes (mean ± SD; age= 19.9 ± 1.3 y; body mass = 72.9 ± 19.6 kg; height = 172.8 ± 7.7 cm) performed two trials of the SJ and CMJ with 0 kg and 20 kg on a force plate; and two trials of mid-thigh isometric clean pulls in a custom rack over a force plate (1000-Hz sampling). Jump height (JH) was calculated from fight time. Force-time curve analyses determined the following: isometric peak force (IPF), isometric force (IF) at 50, 90, and 250 ms, and isometric rates of force development (IRFD). Absolute and allometric scaled forces, [absolute force/(body mass0.67)], were used in correlations.Results:IPF, IRFD, F50a, F50, F90, and F250 showed moderate/strong correlations with SJ and CMJ height percent decrease from 0 to 20 kg. IPFa and F250a showed weak/moderate correlations with percent height decrease. Comparing strongest (n = 6) to weakest (n = 6): t tests revealed that stronger athletes (IPFa) performed superior to weaker athletes.Conclusion:Data indicate the ability to produce higher peak and instantaneous forces and IRFD is related to JH and to smaller differences between weighted and unweighted jump heights. Stronger athletes jump higher and show smaller decrements in JH with load. A weighted jump may be a practical method of assessing relative strength levels.

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