REACTIVE STRENGTH INDEX IN SPORT

Abstract

Aim: This study aims to examine the effect of reactive strength index in sport. Athletes have different muscle activation at different intensities and durations while performing. One of these actions is the stretch-shortening cycle. Tension-shortening cycle (TSC) is an important component of the ability to produce force in minimum time. However, TSC, functionality is evaluated with the concept of reactive strength index (RSI). RSI is defined as the athlete's ability to switch from eccentric muscle contraction to concentric contraction in a sudden manner. Method: This study is a systematic review to examine the effect of reactive strength index in sports. For this study, 'Optimal Jump Height', 'Ground Stay Time', 'Reactive Strength Index' and 'Sport' were determined as keywords. Then, the related keywords were searched in PubMed, EBSCOhost, Web of Science, Google Scholar databases and analysed using document analysis method. Results: When the literature on the subject is analysed, it has shown that RKI has a strong relationship with both change of direction speed and acceleration speed. In addition, it was determined that there were strong relationships between reactive strength and offensive and defensive agility in Australian football players. Conclusion: The RKI test is a measure of strength and an indicator of the development of strength. In addition, this test is a practical way to assess the quality of athletes' training and can be used to monitor, evaluate and reduce the athlete's risk of injury.