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Why is countermovement jump height greater than squat jump height?
Medicine & Science in Sports & Exercise, 1996In the literature, it is well established that subjects are able to jump higher in a countermovement jump (CMJ) than in a squat jump (SJ). The purpose of this study was to estimate the relative contribution of the time available for force development and the storage and reutilization of elastic energy to the enhancement of performance in CMJ compared ...
Bobbert, Maarten F. +3 more
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Biomechanical Analysis of Squat Jump and Countermovement Jump From Varying Starting Positions
Journal of Strength and Conditioning Research, 2013The purpose of this study was to investigate the effect of 2 strategies, defined by foot placement during the initiation of the take-off on performance in vertical jumps. The additional area of interest in this experiment was whether technique of the take-off phase might be an exploratory factor that has different electromyogram (EMG) muscle activity ...
Krzysztof, Mackala +3 more
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Test-Retest Reliability of Three Different Countermovement Jumping Tests
Journal of Strength and Conditioning Research, 2008In studies of physical performance comprising muscle strength and power, a vertical jump is a test method that frequently is used. It is important to have access to accurate measuring tools providing data with high reproducibility. Studies have shown that body composition also may play an important part in physical performance.
Frode, Slinde +4 more
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Alternative Countermovement-Jump Analysis to Quantify Acute Neuromuscular Fatigue
International Journal of Sports Physiology and Performance, 2015Purpose:To examine the reliability and magnitude of change after fatiguing exercise in the countermovement-jump (CMJ) test and determine its suitability for the assessment of fatigue-induced changes in neuromuscular (NM) function. A secondary aim was to examine the usefulness of a set of alternative CMJ variables (CMJ-ALT) related to CMJ mechanics ...
Rob, Gathercole +3 more
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The effects of arms and countermovement on vertical jumping
Medicine & Science in Sports & Exercise, 1990Countermovement and arm-swing characterize most jumping. For determination of their effects and interaction, 18 males jumped for maximal height from a force platform in all four combinations of arm-swing/no-arm-swing and countermovement/no-countermovement. For all jumps, vertical velocity peaked 0.03 s before and dropped 6-7% by takeoff.
E A, Harman +3 more
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Reliability of Squat Jump and Countermovement Jump Performance in Masters Athletes
La Prensa Medica, 2016Reliability of Squat Jump and Countermovement Jump Performance in Masters Athletes Despite their widespread use in performance assessment in younger athletes, the reliability of squat jump (SJ) and countermovement jump (CMJ) assessments has not been reported in master’s athletes.
Delvecchio, L. +3 more
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Reliability of Measures Obtained During Single and Repeated Countermovement Jumps
International Journal of Sports Physiology and Performance, 2008Purpose:To establish the reliability of various measures obtained during single and repeated countermovement jump (CMJ) performance in an elite athlete population.Methods:Two studies, each involving 15 elite Australian Rules Football (ARF) players were conducted where subjects performed two days, separated by one week, of AM and PM trials of either a ...
Cormack, Stuart +3 more
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Countermovement jump in performance diagnostics: Use of the correct jumping technique
European Journal of Sport Science, 2011AbstractThe aim of this study was to examine the effects of arm‐swing and sporting activity on jump height and jump height variability of countermovement jumps in adolescent students to inform correct jumping technique in different settings. Altogether, 324 students (grades 5–11) performed three countermovement jumps with bilateral arm‐swings and three
Richter, Anne +3 more
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Journal of Strength and Conditioning Research, 2018
Abstract Barker, LA, Harry, JR, and Mercer, JA. Relationships between countermovement jump ground reaction forces and jump height, reactive strength index, and jump time. J Strength Cond Res 32(1): 248–254, 2018—The purpose of this study was to determine the relationship between ground reaction force (GRF) variables to jump height, jump time,
Barker, Leland A. +2 more
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Abstract Barker, LA, Harry, JR, and Mercer, JA. Relationships between countermovement jump ground reaction forces and jump height, reactive strength index, and jump time. J Strength Cond Res 32(1): 248–254, 2018—The purpose of this study was to determine the relationship between ground reaction force (GRF) variables to jump height, jump time,
Barker, Leland A. +2 more
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A comparison of one-legged and two-legged countermovement jumps
Medicine & Science in Sports & Exercise, 1985Ten well-trained male volleyball players performed one-legged and two-legged vertical countermovement jumps. Ground reaction forces, cinematographic data, and electromyographic data were recorded. Jumping height in one-legged jumps was 58.5% of that reached in two-legged jumps.
van Soest, A J +4 more
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