Better Coaching with Luke Gromer

133. Modern Skill Acquisition Made Simple: Rethinking Practice Design, Feedback, & Constraints with Javier Miller-Estrada

Mar 2, 2026
Guest
Javi Miller-Estrada
Javier Miller-Estrada, co-founder of Ignite Performance and host of The Adaptable Athlete Podcast, shares modern, athlete-centered approaches to skill acquisition. He discusses prioritizing adaptability over rote repetition. Short segments cover using constraints, designing representative practice, shaping feedback, and creating game-like tasks that preserve creativity while improving problem-solving.
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INSIGHT

Find Invariant Features Not A Single Ideal Model

  • Identify invariant features—constraints that must be present for effectiveness—while leaving wide bandwidth for individual movement solutions.
  • Javi warns against rigid model-driven coaching and uses sprinting and shooting invariants as examples.
ADVICE

Prefer Fewer Game‑Like Reps Over Many Unopposed Reps

  • Replace high-volume uncontested reps with fewer, more representative opposed reps to improve game transfer and retention.
  • Luke cites research showing opposed practice produced better game shooting despite lower practice percentages.
ADVICE

Start Sessions With A Clear Intention And Debrief

  • Define a clear intention for every session and design drills that align with that learning goal rather than rote drill lists.
  • Use the planner questions Javi created: intention, session debrief, feedback quality, and next steps.
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