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The Power Retention Model™

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Performance is not defined by how high output peaks.

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It is defined by how well that output is sustained.

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For decades, performance testing has rewarded the highest jump, the fastest sprint, or the most powerful repetition.

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These measurements reveal an athlete’s potential.

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They do not reveal whether that potential can be reproduced when it matters most.

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The Power Retention Model shifts the focus from isolated performance to sustained performance.

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The Problem

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Most performance systems are designed to maximize peak output.

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Training is often judged by:

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• Higher jump height
• Faster bar velocity
• Greater power
• Bigger one-repetition efforts

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These metrics identify capability.

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They do not identify reliability.

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Competition rarely depends on producing one exceptional effort.

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It demands producing high-quality efforts repeatedly under increasing fatigue, pressure, and uncertainty.

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Peak output creates opportunity.

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Retention determines performance.

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A Different View of Performance

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Power should not be viewed as a single event.

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It should be viewed as a repeated demand.

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The fundamental question becomes:

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How much of an athlete’s best performance can they continue to express?

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If performance rapidly deteriorates after the first exposure, its practical value becomes limited.

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Output that cannot be reproduced is difficult to transfer consistently to sport.

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The Power Retention Model

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The Power Retention Model defines performance as the ability to sustain high-quality output across repeated exposures.

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Rather than treating peak performance as the objective, the model recognizes four interacting components.

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Peak Output

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The highest performance an athlete can produce in a fresh state.

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Peak output establishes potential.

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It does not establish consistency.

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Re-expression

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The ability to reproduce performance after the initial exposure.

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This is often where early fatigue first becomes visible.

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Strong re-expression allows athletes to repeatedly access high levels of performance rather than relying on a single exceptional effort.

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Retention

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The ability to maintain output across continued exposures.

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Retention reflects the durability of performance.

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Higher retention indicates that performance remains stable despite accumulating fatigue.

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Output Behavior

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The characteristic way performance changes throughout repeated efforts.

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Some athletes demonstrate rapid breakdown.

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Others decline gradually.

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The most durable performers exhibit minimal variation across exposures.

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Understanding these patterns provides greater insight than peak values alone.

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The Central Principle

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Performance is defined by consistency of output, not by the magnitude of a single effort.

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Peak performance remains valuable.

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But its value depends on whether it can be reproduced.

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A Practical Example

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Consider two athletes.

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Athlete A produces the highest single repetition.

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However, performance declines substantially during subsequent efforts.

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Athlete B demonstrates a slightly lower peak.

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Yet performance remains remarkably stable throughout the session.

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Although Athlete A demonstrates greater maximum capacity, Athlete B possesses greater usable performance because that output remains available throughout repeated demands.

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Why This Matters

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Most sports require athletes to:

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• Produce repeated efforts
• Maintain technical quality
• Resist fatigue
• Execute consistently under pressure

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These qualities depend less on isolated peak performance and more on retained performance.

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If output cannot be sustained, it becomes increasingly difficult to rely on during competition.

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Applying the Model

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The Power Retention Model provides the conceptual foundation for how performance is evaluated and developed within the EVZ System.

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It guides coaches toward three fundamental questions:

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Evaluation

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How stable is the athlete’s output?

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Programming

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How can repeatability and performance durability be improved?

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Longitudinal Development

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Is the athlete becoming more resilient over time?

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These questions extend beyond maximizing output toward maximizing sustainable performance.

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Relationship to the EVZ System

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The Power Retention Model provides the theoretical foundation for the EVZ methodology.

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It is implemented through:

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• Retainable Power Index (RPI™) — quantifies retained performance
• Output Retention Programming (ORP™) — develops retained performance
• Diagnostic Testing — evaluates output behavior
• Session Score — summarizes overall session quality
• Trend Analysis — monitors adaptation over time

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Together these systems provide an objective framework for evaluating not only how much performance an athlete can produce, but how consistently they can reproduce it.

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System Philosophy

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The objective of training is not simply to increase performance.

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It is to increase performance that lasts.

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Athletes should not be judged solely by what they can produce once.

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They should be evaluated by what they can repeatedly express under consistent conditions.

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That is the foundation of durable performance.

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That is the principle behind the Power Retention Model.

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Developed Through

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The Power Retention Model was developed through the integration of:

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• Olympic weightlifting performance
• Applied coaching across diverse populations
• Repeated-performance analysis
• Systematic observation of output behavior
• Longitudinal training evaluation

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It serves as the theoretical foundation of the Evans Velo Zone™ methodology, where performance is defined not by isolated excellence, but by sustained, repeatable output.