Why the Study Was Done ? The Eccentric Utilization Ratio (EUR) is calculated by comparing an athlete's countermovement jump (CMJ) to their squat jump (SJ) performance. Previous research has established that EUR is a valuable metric for tracking how well elite athletes utilize the stretch-shortening cycle (SSC) during different phases of their training. However, it was unknown if this metric was equally useful for non-elite populations. The primary purpose of this study was to

Unlocking Athlete Power: A Deep Dive into the Eccentric Utilization Ratio (EUR) Why the Study Was Done  Strength and conditioning professionals are constantly seeking reliable and valid tests to evaluate muscular performance and explosive power. Because the ability to efficiently utilize the stretch-shortening cycle (SSC) is a critical factor in many sports, sports scientists look for practical ways to measure it. The Eccentric Utilization Ratio (EUR)—calculated as the ratio

In high-performance environments, Jump Height has historically been the "king" metric. However, Jump Height is an outcome measure—it tells you what happened, but not how it happened. Two athletes can jump the exact same height using vastly different strategies. One might be explosive and spring-like, while the other might be slow and muscle-dominant. This is where the Modified Reactive Strength Index (RSI-Mod)  becomes a valuable metric for practitioner’s to "look under the h