The formula to calculate the Reactive Strength Index (RSI) is:
\[ RSI = \frac{JH}{CT} \]
Where:
Let's say the jump height (\( JH \)) is 0.5 meters, and the contact time (\( CT \)) is 0.2 seconds. Using the formula:
\[ RSI = \frac{0.5}{0.2} \]
We get:
\[ RSI = 2.5 \]
So, the Reactive Strength Index (\( RSI \)) is 2.5.
The Reactive Strength Index (RSI) is a measurement used in sports science to evaluate an athlete’s explosive leg power, specifically their ability to change quickly from an eccentric to a concentric contraction. It is calculated by dividing the height jumped by the time spent on the ground during a depth jump or drop jump. A higher RSI indicates a greater level of reactive strength and plyometric ability, which is crucial in many sports for actions such as sprinting and jumping.
