Adam Singer built an MMA gym around one rule -
if you modify the resistance, it isn't sparring anymore.
Picture a fighter who looks perfect in training. Every pad round is crisp, every drilled combi...
Commentary — this one's off the podcast calendar entirely, a reactive piece tied to a news item rather than an episode.
The Constraints Collective · Blog · September 2026
Somewhere in England...
September 2026 - Monthly Catch-Up, Episode 109 (provisional) - Hosts: Ian Renshaw & Keith Davids
You've seen this before: a team wins something big, and within a season every programme in the sp...
A few days ago Jay Carter – Golf New Zealand’s National Team Coach, host of the Talking Performance podcast, and someone we’ve had the pleasure of working with when presenting to the NZ PGA – sent us ...
Theory Paper – Ian Renshaw & Keith Davids – The Constraints Collective Podcast
Picture two sessions. In the first, cones mark the exact channel a player must dribble through, a serve has to land in...
Episode 106 · Craig Harrison · The Constraints Collective Podcast
Every coach would agree that failure is a key part of learning. Indeed, we would frame "failure" as discovering through exploration...
August 2026 · Monthly Catch-Up, Episode 105 · Hosts: Ian Renshaw & Keith Davids
"Sir, how could you identify a player's background just by watching his batting stance?" One of coach Amladi's stude...
Ian Renshaw & Keith Davids review Gullich et al (2021) — "What Makes a Champion: Early Multidisciplinary Practice, Not Early Specialization, Predicts World-Class Performance"
Paper Under Review —
...
Ian Renshaw & Keith Davids · Monthly Catch-Up · July 2026 · The Constraints Collective
You've probably heard a version of it from your own group: "we're rubbish in the wet." Not because the skill i...
The Funnel, Not the Average: Chris Button on the PhD That Almost Wasn't (Part One)
Episode 100 · Prof. Chris Button (Part One) · The Constraints Collective Podcast
Hand someone a hammer, a nail, a...
The Video Doesn't Show What Happened.
It Shows a Rendering of It.
Ian Renshaw & Keith Davids review Schütz, Betsch & Plessner (2026): "The Impact of Video Speed on Intention Attribution," with speci...
