The EVZ Framework: Key Terms and Definitions
If you’re seeing:
• Strong peak output
• Inconsistent performance
• Drop-off across sets
You’re not looking at a strength problem.
You’re looking at a retention problem.
This glossary serves as the official terminology reference for the Evans Velo Zone™ methodology.
EVZ Glossary
Purpose
The EVZ Terminology Framework establishes the common language used throughout the EVZ methodology. These definitions support assessment, interpretation, developmental phase selection, programming, and longitudinal athlete development.
This framework shifts the focus from isolated peak output to:
• Sustained, repeatable, and transferable performance
Core Principle
Within the EVZ system, Performance is not defined by what an athlete produces once. It is defined by how performance is retained, transferred, expressed, and re-attained across repeated efforts.
EVZ Terminology
Developmental Framework:
1. Developmental Phase
Definition:
A structured stage within the EVZ framework that defines the primary objective of training based on an athlete’s assessment findings.
Context:
Developmental phases guide coaching decisions by identifying what should be improved next rather than prescribing specific exercises or programs.
See → The EVZ Development Model™
2. Retention Phase
Definition:
The developmental phase focused on improving an athlete’s ability to consistently maintain intended performance across repeated efforts.
Context:
The Retention Phase establishes a stable foundation before increasing training demands. Athletes who struggle to sustain performance are unlikely to transfer or express higher levels of output consistently.
See → Programming Through the EVZ Developmental Phases™
3. Transfer Phase
Definition:
The developmental phase focused on improving an athlete’s ability to maintain performance as training demands become progressively more challenging.
Context:
Transfer develops the bridge between stable performance and more advanced outputs by introducing increased load, complexity, speed, or sport-specific demands while preserving quality.
See → Programming Through the EVZ Developmental Phases™
4. Output Phase
Definition:
The developmental phase focused on maximizing intended performance while preserving the qualities developed during Retention and Transfer.
Context:
Output emphasizes increasing force, velocity, or power while preserving the performance qualities developed during earlier phases.
See → Programming Through the EVZ Developmental Phases™
5. Re-attainment Phase
Definition:
The developmental phase focused on restoring previously established performance following fatigue, regression, injury, or interruption.
Context:
Rather than developing new capacity, Re-attainment rebuilds reliable performance so athletes can return to higher developmental phases efficiently.
See → Programming Through the EVZ Developmental Phases™
Assessment Modes:
6. Observation Mode
Definition:
An EVZ assessment method that evaluates coach-defined intended performance outcomes using structured coaching observation without requiring technology.
Context:
Observation Mode allows coaches to assess movement quality, technical execution, consistency, and intended outcomes across repeated efforts using standardized scoring.
See → The EVZ Development Model™
7. Tech Mode
Definition:
An EVZ assessment method that uses objective performance metrics, such as power, velocity, or force, to evaluate athlete development.
Context:
Tech Mode provides quantitative data to support coaching decisions while remaining integrated within the same developmental framework.
See → Retainable Power Index (RPI™)
8. Hybrid Mode
Definition:
An EVZ assessment method that combines observational coaching with objective performance metrics of coach-defined intended outcomes to provide a more comprehensive evaluation of athlete development.
Context:
Hybrid Mode integrates qualitative and quantitative information into a single developmental recommendation, allowing coaches to balance measurable performance with movement quality.
See → Retainable Power Index (RPI™)
Performance Concepts:
9. Output
Definition:
The measurable expression of force, velocity, or power during a single effort.
Context:
Output reflects momentary capability, but does not indicate how performance behaves across repeated efforts.
See → The EVZ Development Model™
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10. Peak Output
Definition:
The highest recorded output achieved during a single effort.
Context:
Represents maximum capacity, but not repeatability, durability, or transfer.
See → Peak Performance Trap™
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11. Capacity
Definition:
The maximum output an athlete can produce under optimal conditions.
Context:
Capacity reflects potential, not sustained performance.
See → Peak Performance Trap™
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12. Exposure
Definition:
A single instance of effort within a training sequence.
Context:
Performance must be evaluated across multiple exposures to assess retention and consistency.
See → EVZ Wave Diagnostic™
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13. Output Behavior
Definition:
The pattern of how output changes across repeated exposures.
Context:
Output behavior reveals whether performance is stable, declining, or inconsistent.
See → EVZ Athlete Development Framework™
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14. Re-Expression
Definition:
The ability to reproduce output after an initial exposure.
Context:
Evaluates how well performance carries from one effort to the next.
See → EVZ Wave Diagnostic™
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15. Retention
Definition:
The ability to maintain a high percentage of output across repeated exposures.
Context:
Retention is the primary indicator of performance durability.
See → Programming Through the EVZ Developmental Phases™
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16. Retainable Output
Definition:
The level of output that can be sustained across repeated exposures without significant decline.
Context:
Represents usable performance, not theoretical maximum.
See → Programming Through the EVZ Developmental Phases™
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Diagnostic Concepts:
17. EVZ Wave Diagnostic™
Definition:
The primary EVZ assessment protocol used to evaluate how performance behaves across repeated efforts and identify an athlete’s current developmental priorities.
Context:
The EVZ Wave Diagnostic interprets output behavior across repeated exposures to identify strengths, limitations, and the most appropriate developmental phase for future training.
See → Retainable Power Index (RPI™)
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18. Drop-Off
Definition:
The decline in output between exposures.
Context:
Some drop-off is expected; excessive decline signals performance breakdown.
See → The Developmental Threshold Principle™
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19. Drop-Off Threshold
Definition:
The point at which output decline becomes meaningful enough to require adjustment.
Context:
Distinguishes between normal fatigue and performance breakdown.
See → The Developmental Threshold Principle™
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20. Output Stability
Definition:
The consistency of output across repeated exposures with minimal fluctuation.
Context:
Indicates strong retention and reliable performance behavior.
See → EVZ Athlete Development Framework™
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21. Output Variability
Definition:
The degree of fluctuation in output across repeated exposures.
Context:
High variability indicates inconsistency, even if peak output is high.
See → EVZ Athlete Development Framework™
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22. Retention Profile
Definition:
The pattern of how output is maintained, declines, or stabilizes across exposures.
Context:
Provides a diagnostic snapshot of performance behavior.
See → EVZ Wave Diagnostic™
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23. Retention Deficit
Definition:
A gap between peak output and the ability to sustain that output.
Context:
Often misinterpreted as a strength limitation.
See → Peak Performance Trap™
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24. Durability
Definition:
The ability to sustain output over time and across repeated exposures.
Context:
Practical expression of retention in training and sport.
See → The EVZ Development Model™
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25. Performance Breakdown
Definition:
A significant and sustained decline in output across exposures.
Context:
Indicates training exceeds the athlete’s retention capacity.
See → The Developmental Threshold Principle™
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26. Transfer
Definition:
The ability of training output to carry over into sport performance.
Context:
Output that cannot be retained across exposures has limited transfer.
See → EVZ Athlete Development Framework™
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27. Translatable Power
Definition:
Power that can be sustained and expressed consistently under sport conditions.
Context:
Reflects both retention and durability.
See → The EVZ Development Model™
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28. Developmentally Driven Programming
Definition:
Programming guided by the athlete’s current EVZ developmental phase rather than isolated performance outcomes.
Context:
Guides decisions based on output behavior, not isolated performance.
See → Programming Through the EVZ Developmental Phases™
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29. Intended Performance Outcome
Definition:
The specific movement quality or performance objective defined by the coach for a given exercise or assessment.
Context:
Observation Mode evaluates how consistently intended performance outcomes are achieved across repeated efforts.Guides decisions based on output behavior, not isolated performance.
See → Observation Mode
System Integration
These definitions support every layer of the EVZ ecosystem, including:
• EVZ Athlete Development Framework™
• EVZ Wave Diagnostic™
• Retainable Power Index (RPI™)
• Observation Mode
• Tech Mode
• Hybrid Mode
• Programming Through the EVZ Developmental Phases™
• EVZ App
• EVZ Certification
They operate as:
• A unified system for diagnosing, interpreting, and improving performance
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Application Layer
If an athlete demonstrates:
• Strong peak output
• Inconsistent performance
• Progressive decline across repeated efforts
EVZ doesn’t simply identify a performance issue, it helps determine which developmental phase should be prioritized next.
