Framework

The Evans Velo Zone Wave® Diagnostic

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Why Repeated Exposures Reveal More Than Peak Performance

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One exceptional effort tells you what an athlete is capable of.

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Repeated and changing exposures reveal how that capability behaves.

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Performance testing often centers on isolated outputs:

• Highest jump
• Fastest sprint
• Greatest power
• Fastest bar velocity

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Those measures establish capability.

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They do not fully explain whether that performance can be repeated, carried across changing demands, expressed consistently at meaningful higher outputs, or restored after a reset.

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That is where developmental performance analysis begins.

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Peak Output Is Only Part of the Picture

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Peak performance matters, but sport rarely consists of one isolated effort.

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Athletes must repeatedly express performance while load, task demands, fatigue, and competitive conditions change. Monitoring performance across repeated exposures can therefore provide information that a single maximal value cannot. Research in athlete monitoring and velocity-based training similarly emphasizes the value of repeated measurements, contextual interpretation, and tracking changes in performance over time.

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The question becomes:

• What can this athlete produce and what happens to that performance next?

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Within Evans Velo Zone® (EVZ™), those questions are organized through four developmental phases:

• Retention → Transfer → Output → Re-attainment

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What Repeated Exposures Can Reveal

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A structured series of exposures creates a performance pattern.

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That pattern can help the coach examine:

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Retention
• Is established performance sufficiently repeatable?

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Transfer
• Does performance respond appropriately as demand changes?

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Output
• Can high performance be repeatedly expressed at the most developmentally relevant demand?

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Re-attainment
• Can previously established performance be restored or surpassed?

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The important distinction is that changing output does not automatically indicate declining performance.

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For example, velocity normally changes as external load changes. Velocity-based training literature specifically recognizes the load-velocity relationship and the usefulness of monitoring individual repetitions when interpreting resistance-training performance.

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Context determines meaning.

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Direction Matters, Not Just Score

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EVZ interprets the complete performance pattern using four directional states:

• Progress — The phase objective is sufficiently established to support advancement.

• Hold — Performance remains viable but is not yet sufficiently established or restored to advance.

• Fade — Previously viable performance meaningfully deteriorates.

• Stall — Productive performance does not sufficiently establish at the current demand.

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These states are interpreted relative to factors such as:

• Phase | Task | Demand | Laterality | Session Structure | Evidence Mode | Athlete History

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The goal is not to classify an athlete from one repetition or one metric, but to determine what the pattern means developmentally.

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A Simple Example

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Consider two athletes performing the same explosive task.

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• Athlete A produces the highest first repetition but declines substantially across subsequent efforts.

• Athlete B begins slightly lower but maintains a much more repeatable profile.

• Athlete A demonstrated greater peak output.

• Athlete B demonstrated stronger retention under the tested conditions.

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Neither result automatically identifies the “better athlete.”

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Instead, each provides different information about how established performance behaved.

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That information can help guide the next coaching decision.

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RPI™: Quantifying the Repeatability Signal

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Within EVZ, the Retainable Power Index (RPI™) is used as a proprietary repeatability signal.

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RPI examines how well performance is retained across repeated exposures relative to an appropriate reference output.

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It is interpreted alongside developmental context such as:

• Phase
• Task
• Demand
• Laterality
• Session structure
• Evidence mode
• Athlete history

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RPI provides the signal. EVZ provides the developmental context.

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RPI is therefore one input within the broader methodology rather than the complete developmental conclusion.

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Different Evidence. Same Developmental Questions.

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EVZ can evaluate performance through three evidence pathways:

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Observation
• Structured practitioner evidence using standardized 2 / 1 / 0 scoring with relevant task and demand context.

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Technology
• Objective measurements such as velocity, power, force, or time.

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Hybrid
• Objective performance data combined with structured practitioner observation.

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Technology can improve measurement precision, but monitoring literature also emphasizes that athlete data must be interpreted within individual and contextual factors rather than relying on a single marker in isolation.

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The Evans Velo Zone Wave® Performance Diagnostic

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The Evans Velo Zone Wave® Performance Diagnostic organizes repeated exposures into a standardized structure:

• Wave 1 → Reset → Wave 2

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Wave 1 establishes a performance profile across relevant demands.

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After a standardized reset, Wave 2 repeats the matched structure.

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The comparison allows the practitioner to evaluate the athlete across all four EVZ phases:

• Retention: Is performance sufficiently repeatable?
• Transfer: Does it respond appropriately as demand changes?
• Output: Is high performance repeatedly expressed at a relevant demand?
• Re-attainment: Does Wave 2 restore or surpass the Wave 1 profile?

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The value of the Wave is not any single number, but the matched performance pattern.

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From Session Analysis to Longitudinal Development

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A session provides a snapshot.

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Repeated sessions create developmental history.

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EVZ uses that history to help the practitioner understand:

• Then — what was previously established
• Now — what the athlete is currently demonstrating
• Next — what should be progressed, held, restored, or reassessed

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This reflects a broader principle in athlete monitoring: the usefulness of data increases when changes are interpreted longitudinally and in relation to the athlete’s training status and context.

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The EVZ decision process can therefore be summarized as:

• Intent → Evidence → Interpretation → Decision → Outcome

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Performance Durability

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Within EVZ, durability is not a fifth developmental phase.

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It is the broader objective:

• Performance that remains reliable over time.

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That may involve:

• retaining established performance,
• transferring it across changing demands,
• developing greater repeatable output,
• and restoring previously established performance when challenged.

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Peak performance establishes capability.

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Repeated and changing exposures reveal how that capability behaves.

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That is the developmental question EVZ is designed to help coaches answer.

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References

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Halson, S. L. (2014). Monitoring training load to understand fatigue in athletes. Sports Medicine, 44(Suppl 2), S139–S147. https://doi.org/10.1007/s40279-014-0253-z

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Weakley, J., Mann, B., Banyard, H. G., McLaren, S. J., Scott, T., & García-Ramos, A. (2021). Velocity-based training: From theory to application. Strength & Conditioning Journal, 43(2), 31–49. https://doi.org/10.1519/SSC.0000000000000560

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Mann, J. B., Ivey, P. A., & Sayers, S. P. (2015). Velocity-based training in football. Strength & Conditioning Journal, 37(6), 52–57. https://doi.org/10.1519/SSC.0000000000000177

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González-García, J., Morencos, E., Balsalobre-Fernández, C., Cuéllar-Rayo, Á., & Romero-Moraleda, B. (2021). Validity and reliability of inertial measurement units for barbell velocity assessments: A systematic review. Sensors, 21(7), 2511.

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Foster, C., Rodriguez-Marroyo, J. A., & de Koning, J. J. (2017). Monitoring training loads: The past, the present, and the future. International Journal of Sports Physiology and Performance, 12(Suppl 2), S2-2–S2-8.

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