Results 1 to 10 of about 114,079 (140)

Association and Agreement between Reactive Strength Index and Reactive Strength Index-Modified Scores [PDF]

Sports, 2021
Since the reactive strength index (RSI) and reactive strength index-modified (RSI-mod) share similar nomenclature, they are commonly referred as interchangeable measures of agility in the sports research literature.
Talin Louder, Brennan J. Thompson, Eadric Bressel   +2 more
doaj   +8 more sources

The association between reactive strength index and reactive strength index modified with approach jump performance [PDF]

PLoS ONE, 2022
Jumping performance is one of the key components of volleyball game, thus evaluating jumping ability through different biomechanical variables offers opportunity for performance optimization.
Jernej Pleša, Žiga Kozinc, Darjan Smajla, Nejc Šarabon   +3 more
doaj   +8 more sources

A Mixed-Methods Approach to Evaluating the Internal Validity of the Reactive Strength Index [PDF]

Sports, 2019
The reactive capacity of the muscle-tendon complex is commonly assessed using the reactive strength index (RSI). Conventionally, the RSI is a ratio of rebound jump height to ground contact time in depth jumping.
Talin Louder, Brennan J. Thompson, Nile Banks, Eadric Bressel   +3 more
doaj   +7 more sources

Enhancing reactive strength index through braking-phase focused verbal instruction [PDF]

Frontiers in Sports and Active Living
This study examined whether verbal instruction emphasizing force exertion during the braking phase of rebound jumps can acutely enhance the reactive strength index (RSI), a key indicator of stretch–shortening cycle performance linked to sprinting and ...
Kuniaki Hirayama, Shingo Nakai, Takafumi Kubo, Takafumi Kubo, Seiichiro Takei, Seiichiro Takei   +5 more
doaj   +3 more sources

The Integral Reactive Strength Index: An Accurate Measurement for Evaluating Drop Jump Performance in Sprinter Athletes

Applied Sciences
The reactive strength index (RSI) is a performance measure previously used to assess lower extremity performance; however, this study addresses limitations in its interpretation that need to be readdressed.
Raynier Montoro-Bombú, Hugo Sarmento, Marije T. Elferink-Gemser, Armando Costa, Paulo Malico Sousa, Luís Rama   +5 more
doaj   +5 more sources

Reactive Strength Index, Rate of Torque Development, and Performance in Well-Trained Weightlifters: A Pilot Study [PDF]

Journal of Functional Morphology and Kinesiology, 2023
The purpose of this study was to investigate the correlation between the reactive strength index (RSI) using the drop jump (DJ) and the isometric rate of torque development (RTD) with weightlifting performance in national-level weightlifters.
Giorgos Anastasiou, Marios Hadjicharalambous, Gerasimos Terzis, Nikolaos Zaras   +3 more
doaj   +5 more sources

The Validity of the Push Band 2.0 on the Reactive Strength Index Assessment in Drop Jump. [PDF]

Sensors (Basel), 2022
This study aims to verify the validity of the Push Band 2.0 (PB2.0) device on the reactive strength index (RSI) measurement, using a force plate (FP) and an optical sensor device, OptoJump (OPT), as a reference. Twenty trained athletes performed 60 drop jump trials with a height box of 30 cm.
Montoro-Bombú R, de la Paz Arencibia L, Buzzichelli C, Miranda-Oliveira P, Fernandes O, Santos A, Rama L.   +6 more
europepmc   +6 more sources

Field-to-laboratory biomechanical profiling of reactive strength index in male volleyball drop jumps [PDF]

Frontiers in Bioengineering and Biotechnology
BackgroundReactive strength index (RSI) is widely used in drop-jump testing, but the score alone does not show how the landing-to-take-off phase is organized.ObjectiveThis study examined whether RSI in male volleyball drop jumps can be interpreted more ...
Di Lu, Yueming Li, Tianyuan He, Jiaxin He, Jiaxin He, Jiaxin He, Jian Sun, Jian Sun, Jian Sun, Duanying Li, Duanying Li, Duanying Li   +11 more
doaj   +2 more sources

Effect of drop jump technique on the reactive strength index. [PDF]

J Hum Kinet, 2016
Abstract The basic drill of plyometric training aimed at improving lower limb power and jump height is a drop jump. This exercise can be performed using different techniques, which substantially affects jump variables. Therefore, the aim of this study was to compare the values of the reactive strength index (RSI) for countermovement drop
Struzik A, Juras G, Pietraszewski B, Rokita A.   +3 more
europepmc   +4 more sources

A method for monitoring reactive strength index

Procedia Engineering, 2010
AbstractUbiquitous motion sensors in shoes and clothing are becoming more prevalent. This new data stream opens a large opportunity to gain a deeper understanding of human movement. This paper describes the development and validation of an algorithm to calculate reactive strength index (RSI) from an accelerometer mounted at the ankle.
Brian Caulfield
exaly   +2 more sources