What is explosive strength deficit?

ESD = (Maximal Isometric Force − Force at 200 ms) / Maximal Isometric Force × 100. High ESD (> 60%) means the athlete cannot express their maximal strength within the time available in explosive tasks. This indicates RFD is the limiting factor, not maximal strength.

How should training be adjusted based on ESD?

High ESD → prioritise ballistic training, plyometrics, and fast-tempo lifts to improve RFD. Low ESD (< 30%) in a weak athlete → prioritise maximal strength training first. The goal is matching maximal force and RFD development.

Explosive Strength Deficit Calculator

Calculate Explosive Strength Deficit (ESD) from maximal isometric force and peak RFD. Identify whether strength or rate of force development is the performance-limiting factor.

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Frequently Asked Questions

What is explosive strength deficit?

How should training be adjusted based on ESD?