4.4 Article

Influence of countermovement depth on the countermovement jump-derived reactive strength index modified

Related references

Note: Only part of the references are listed.
Article Engineering, Biomedical

Knowledge of results during vertical jump testing: an effective method to increase the performance but not the consistency of vertical jumps

Amador Garcia-Ramos et al.

Summary: This study found that providing jump height feedback can effectively enhance vertical jump performance, but it does not reduce the variability between jumps.

SPORTS BIOMECHANICS (2023)

Article Sport Sciences

Comparison of Countermovement Jump-Derived Reactive Strength Index Modified and Underpinning Force-Time Variables Between Super League and Championship Rugby League Players

John J. McMahon et al.

Summary: This study compared the reactive strength and force-time variables between Super League and Championship rugby league players, finding that Super League players achieved higher reactive strength with shorter take-off time. Additionally, there were significant differences in displacement, propulsion peak force, and power between the two leagues.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2022)

Article Engineering, Biomedical

Reliability and magnitude of loaded countermovement jump performance variables: a technical examination of the jump threshold initiation

Alejandro Perez-Castilla et al.

Summary: This study investigated the influence of the jump starting threshold on the reliability and magnitude of loaded countermovement jump (CMJ) performance variables. The results showed that the 50 N, 10%SW, and 5SDSW thresholds provided higher reliability and significant differences in magnitude compared to the 10 N and 1%SW thresholds.

SPORTS BIOMECHANICS (2022)

Article Sport Sciences

Phase-Specific Predictors of Countermovement Jump Performance That Distinguish Good From Poor Jumpers

John Krzyszkowski et al.

Summary: This study examined the phase-specific predictors of countermovement jump performance and differences between performers with high and low Reactive Strength Index (RSImod) scores. The high RSImod group exhibited significantly greater RSImod scores, jump heights, shorter times to takeoff and concentric times, and a greater braking rate of force development (RFD) compared to the low RSImod group.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2022)

Article Sport Sciences

Low-Pass Filter Effects on Metrics of Countermovement Vertical Jump Performance

John R. Harry et al.

Summary: This study compared the effects of different filtering methods on data analysis of countermovement vertical jump (CMVJ) performance. The results showed that low-pass filtering is not necessary when analyzing GRF data from CMVJ, but a 50Hz low-pass filter can remove noise without altering results.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2022)

Article Engineering, Biomedical

Vertical jump performance is affected by the velocity and depth of the countermovement

Alejandro Perez-Castilla et al.

Summary: The study found that performing countermovement jumps at a faster velocity resulted in higher or comparable performance compared to self-selected velocity; shorter depth jumps showed higher force, power, and reactive strength index-modified values, while peak velocity and jump height were higher for larger and self-preferred depths; the force-time curve was bimodal for larger depth jumps and unimodal for shorter depth jumps, indicating that vertical jump performance is influenced by the velocity and depth of the countermovement.

SPORTS BIOMECHANICS (2021)

Article Sport Sciences

The effect of body size on countermovement jump kinetics in children aged 7-11 years

Christopher Mark Jones et al.

EUROPEAN JOURNAL OF SPORT SCIENCE (2020)

Article Sport Sciences

STRENGTH AND CONDITIONING PRACTICES IN ADOLESCENT RUGBY PLAYERS: RELATIONSHIP WITH CHANGES IN PHYSICAL QUALITIES

Jonathon J. S. Weakley et al.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2019)

Article Sport Sciences

Intrasession and Intersession Reliability of Countermovement Jump Testing in Division-I Volleyball Athletes

Kevin M. Carroll et al.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2019)

Article Sport Sciences

SELF-PREFERRED INITIAL POSITION COULD BE A VIABLE ALTERNATIVE TO THE STANDARD SQUAT JUMP TESTING PROCEDURE

Milan S. Petronijevic et al.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2018)

Article Sport Sciences

Force-Time Characteristics of the Countermovement Jump: Analyzing the Curve in Excel

Shyam Chavda et al.

STRENGTH AND CONDITIONING JOURNAL (2018)

Article Physiology

Influence of the Reactive Strength Index Modified on Force- and Power-Time Curves

John J. McMahon et al.

INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE (2018)

Article Engineering, Biomedical

Kinetic and Electromyographic Subphase Characteristics With Relation to Countermovement Vertical Jump Performance

John R. Harry et al.

JOURNAL OF APPLIED BIOMECHANICS (2018)

Article Sport Sciences

Understanding the Key Phases of the Countermovement Jump Force-Time Curve

John J. McMahon et al.

STRENGTH AND CONDITIONING JOURNAL (2018)

Article Sport Sciences

Larger Countermovement Increases the Jump Height of Countermovement Jump

Alberto Sanchez-Sixto et al.

SPORTS (2018)

Article Physiology

Countermovement-Jump-Phase Characteristics of Senior and Academy Rugby League Players

John J. McMahon et al.

INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE (2017)

Article Sport Sciences

Sex Differences in Countermovement Jump Phase Characteristics

John J. McMahon et al.

SPORTS (2017)

Article Sport Sciences

COMPARISON OF METHODS THAT ASSESS LOWER-BODY STRETCH-SHORTENING CYCLE UTILIZATION

Timothy J. Suchomel et al.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2016)

Article Sport Sciences

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

Kristof Kipp et al.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2016)

Article Sport Sciences

A COMPARISON OF REACTIVE STRENGTH INDEX-MODIFIED BETWEEN SIX US COLLEGIATE ATHLETIC TEAMS

Timothy J. Suchomel et al.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2015)

Article Sport Sciences

USING REACTIVE STRENGTH INDEX-MODIFIED AS AN EXPLOSIVE PERFORMANCE MEASUREMENT TOOL IN DIVISION I ATHLETES

Timothy J. Suchomel et al.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2015)

Article Sport Sciences

DEVELOPMENT OF A CRITERION METHOD TO DETERMINE PEAK MECHANICAL POWER OUTPUT IN A COUNTERMOVEMENT JUMP

Nick J. Owen et al.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2014)

Article Physiology

Jump training with different loads: effects on jumping performance and power output

Srdjan Markovic et al.

EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY (2013)

Article Sport Sciences

RELATIONSHIP BETWEEN REACTIVE STRENGTH VARIABLES IN HORIZONTAL AND VERTICAL DROP JUMPS

Nick B. Ball et al.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2012)

Article Sport Sciences

Effects of Jump Training with Negative versus Positive Loading on Jumping Mechanics

G. Markovic et al.

INTERNATIONAL JOURNAL OF SPORTS MEDICINE (2011)

Article Engineering, Biomedical

Relative Net Vertical Impulse Determines Jumping Performance

Tyler J. Kirby et al.

JOURNAL OF APPLIED BIOMECHANICS (2011)

Article Sport Sciences

USING THE REACTIVE STRENGTH INDEX MODIFIED TO EVALUATE PLYOMETRIC PERFORMANCE

William P. Ebben et al.

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH (2010)

Article Physiology

Reliability of Measures Obtained During Single and Repeated Countermovement Jumps

Stuart J. Cormack et al.

INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE (2008)

Article Physiology

Humans adjust control to initial squat depth in vertical squat jumping

Maarten F. Bobbert et al.

JOURNAL OF APPLIED PHYSIOLOGY (2008)

Article Sport Sciences

Progressive Statistics for Studies in Sports Medicine and Exercise Science

WILLIAM G. HOPKINS et al.

MEDICINE AND SCIENCE IN SPORTS AND EXERCISE (2008)

Article Education, Scientific Disciplines

Analysis of standing vertical jumps using a force platform

NP Linthorne

AMERICAN JOURNAL OF PHYSICS (2001)