Reactive Strength Index (RSI)
RSI is derived from ground contact time (GCT) and jump height. It is a
composite score used to measure the level of “reactive strength”.
Typically a higher RSI will yield a more explosive athlete
It was developed at the Australian Institute
of Sport and more information can be
easily found
on the web (link below).
13
RSI = Jump Height / GCT
at Science for Sport