Eccentric Utilization Ratio (EUR) is computed as CMJ height ÷ SJ height. Because the CMJ includes a stretch-shortening cycle (SSC) pre-load and the SJ does not, the ratio quantifies how much extra height the athlete extracts from the SSC.
An EUR significantly above 1.0 (typical: 1.05–1.15) means the athlete is using the SSC effectively. An EUR close to 1.0 suggests the athlete is essentially "concentric only" — they aren't capturing eccentric pre-load. That's a training cue toward more plyometric and reactive work.
Most informative when tracked longitudinally on the same athlete; absolute EUR varies enough between athletes that single comparisons are noisy.
Where it's used
Lab and field-test interpretation when both CMJ and SJ are run on the same testing day.
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