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The Problem Wasn’t Power, It Was Keeping It.

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A golfer can generate exceptional club head speed.

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An Olympic weightlifter can produce explosive bar speed.

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A sprinter can accelerate rapidly.

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Yet athletes across every sport often describe the same problem.

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“I feel great early, but I can’t maintain it.”

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The issue is not always producing performance.

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Often, it is retaining it.

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The Athlete

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A professional golfer came to me with a familiar complaint.

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His first swings felt powerful and controlled.

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As the round progressed, his performance became less predictable.

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He wasn’t losing motivation.

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He wasn’t suddenly becoming weaker.

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He simply couldn’t reproduce the same quality of performance throughout competition.

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Traditional testing showed an athlete with excellent physical capacity.

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The missing information was how that capacity behaved across repeated efforts.

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Looking Beyond Peak Performance

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Rather than focusing exclusively on increasing club head speed, we evaluated repeated performance across multiple movement patterns.

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These included:

• Lateral
• Vertical
• Rotational
• Horizontal

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The objective wasn’t simply to identify the athlete’s highest output.

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It was to understand how consistently that output could be reproduced over repeated exposures.

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Different movement patterns behaved differently.

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Some remained remarkably stable.

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Others became increasingly inconsistent as performance continued.

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That distinction guided every programming decision that followed.

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Changing the Goal

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Instead of chasing higher peak outputs, training emphasized:

• More consistent repeated performance
• Greater movement stability
• Improved performance durability
• Better retention across repeated exposures

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The objective shifted from producing more to preserving more.

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What Changed

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Over the following weeks, peak outputs changed very little.

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What changed was something more important.

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Repeated performance became increasingly stable.

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Movement quality remained more consistent.

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The athlete reported:

• Greater swing consistency
• More predictable ball striking
• Better control throughout entire rounds

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Performance became less dependent on isolated moments and more reliable over time.

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Why This Matters in Golf

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Although golf is often described as a rotational sport, successful performance depends on much more than rotational speed.

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Golfers must repeatedly produce:

• Lateral force transfer
• Rotational sequencing
• Vertical force production
• Coordinated movement

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As repeated swings accumulate, small losses in movement quality often become meaningful changes in performance.

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Improving output retention across these movement patterns helps athletes maintain their performance rather than simply producing isolated moments of excellence.

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Measuring What Improved

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Within the EVZ methodology, repeated-performance behavior is evaluated using the Retainable Power Index (RPI™).

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Rather than measuring only peak performance, RPI quantifies how effectively athletes retain their highest demonstrated output across repeated exposures.

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This allows coaches to determine:

• Which movement patterns remain stable
• Which deteriorate most quickly
• How athletes respond to repeated demand
• Whether programming is improving performance durability over time

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The goal is not simply producing exceptional output.

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The goal is making exceptional output repeatable.

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A Pattern Beyond One Athlete

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The same repeated-performance principles were later applied to additional golfers.

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Although each athlete presented unique strengths and weaknesses, a common pattern emerged.

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Early variability gradually became greater consistency.

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Repeated performance became more stable.

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Athletes reported increased confidence because performance became increasingly predictable rather than dependent on exceptional swings.

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This suggested that the adaptation was not unique to one individual.

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It reflected a broader principle of performance development.

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What Coaches Can Learn

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Many training systems successfully improve physical capacity.

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The greater challenge is ensuring that capacity remains available throughout competition.

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When athletes begin losing performance after the opening stages of a session or event, the solution is not always more strength, more volume, or greater intensity.

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Sometimes the limiting factor is performance durability.

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Understanding how performance behaves across repeated exposures provides coaches with information that isolated testing cannot.

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The EVZ Perspective

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Athletes are rarely limited by what they can produce once.

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They are more often limited by what they can repeatedly sustain.

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The Power Retention Model™ explains why repeated performance matters.

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The Retainable Power Index (RPI™) measures repeated performance.

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Output Retention Programming (ORP™) develops greater performance durability over time.

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Together they help coaches move beyond chasing peak performance toward developing performance that remains available when competition demands it most.

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Because in sport, success is rarely determined by the first effort.

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It is determined by the quality of the efforts that follow.