Results 11 to 20 of about 6,027,929 (265)
Reactive strength index-modified: reliability, between group comparison, and relationship between its associated variables [PDF]
Biology of Sport, 2020 To investigate and compare the reliability of reactive strength index-modified (RSImod) and its associated variables (jump height [JH] and [time to take-off]) 20 combat fighters and 18 physically active men participated in this study.
Amilton Vieira, James J. Tufano
doaj +4 more sources
The Use of Contact Time and the Reactive Strength Index to Optimize Fast Stretch-Shortening Cycle Training [PDF]
Strength and Conditioning Journal, 2008 THIS ARTICLE REVIEWS RESEARCH RELATING TO THE STRETCH-SHORTENING CYCLE AND PLYOMETRICS. THE ARTICLE INSTRUCTS STRENGTH AND CONDITIONING PRACTITIONERS IN THE USE OF GROUND CONTACT TIMES AND THE REACTIVE STRENGTH INDEX IN PLYOMETRIC TRAINING. DOCUMENTATION ON HOW THESE MEASUREMENTS CAN BE USED TO OPTIMIZE PLYOMETRICS AND TO IMPROVE ATHLETES' FAST STRETCH
Flanagan, Eamonn P., Comyns, Thomas M.
exaly +3 more sources
Reactive Strength Index: A Poor Indicator of Reactive Strength? [PDF]
International Journal of Sports Physiology and Performance, 2018 Purpose:To assess the relationships between reactive strength measures and associated kinematic and kinetic performance variables achieved during drop jumps. A secondary aim was to highlight issues with the use of reactive strength measures as performance indicators.Methods:Twenty-eight national- and international-level sprinters, 14 men and 14 women ...
Healy, Robin +2 more
core +5 more sources
Landing Styles Influences Reactive Strength Index without Increasing Risk for Injury. [PDF]
Sports Med Int Open, 2018 AbstractThe aim was to determine which three landing styles – stiff (ST), self-selected (SS), or soft (SF) – exhibit safer landing mechanics and greater jumping performance. Thirty participants (age: 26.5±5.1 years; height: 171.0±8.8 cm; weight: 69.7±10.1 kg) performed five trials of three randomized drop jump (40 cm) landing styles including SF (~60 ...
Guy-Cherry D +4 more
europepmc +4 more sources
Reactive strength index during single-limb vertical continuous jumps after anterior cruciate ligament reconstruction: cross-sectional study [PDF]
BMC Sports Science, Medicine and Rehabilitation, 2022 Background The association of the reactive strength index (RSI) during single-limb vertical continuous jumps (SVCJs) with single-limb hop tests in athletes after anterior cruciate ligament reconstruction (ACLR) is unclear.
Kenji Hirohata +9 more
doaj +2 more sources
Relationship Between Reactive Strength Index Variants in Rugby League Players [PDF]
Journal of Strength & Conditioning Research, 2021 Abstract McMahon, JJ, Suchomel, TJ, Lake, JP, and Comfort, P. Relationship between reactive strength index variants in rugby league players. J Strength Cond Res 35(1): 280–285, 2021—Two reactive strength index (RSI) variants exist, the RSI and RSI modified (RSImod), which are typically calculated during the drop jump (DJ) and countermovement ...
McMahon, JJ +3 more
openaire +4 more sources
Reliability of and Relationship between Flight Time to Contraction Time Ratio and Reactive Strength Index Modified. [PDF]
Sports (Basel), 2018 Countermovement jump (CMJ) force-time testing is commonly used to monitor seasonal alterations in athletes’ CMJ strategy (to infer alterations in neuromuscular function). The flight time to contraction time (FT:CT) ratio and reactive strength index modified (RSImod) are considered to be two primary CMJ variables of interest. Due to similar calculations,
McMahon JJ, Lake JP, Comfort P.
europepmc +6 more sources
High-intensity interval training improves the reactive strength index and motor ability of youth football players [PDF]
BMC Sports Science, Medicine and RehabilitationBackground The aim of this randomized controlled trial was to determine the effects of a four-week running-based high-intensity interval training (HIIT) intervention on the reactive strength index (RSI) and motor abilities in youth football players.
Serkan Kızılca +8 more
doaj +2 more sources
Applied SciencesThe aim of the present study was to assess a new reactive strength index (RSI RUN) based on contact time and stride length measured in sprint running and then to correlate this index with sprint performance, muscle architecture and echo intensity of the ...
Simone Ciacci +2 more
doaj +3 more sources
Reactive Strength Index Modified Is a Valid Measure of Explosiveness in Collegiate Female Volleyball Players [PDF]
Journal of Strength and Conditioning Research, 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.
Kipp, Kristof +2 more
openaire +4 more sources