The Constraints Collective

Our mission is to transform practice environments in sport by equipping coaches with the knowledge, understanding and skills to bridge the gap between skill acquisition theory and practice.

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#113
October 29 · 48 min
Episode #113 It All Stems from Byrom Street: The Roots of Sports Science
In this month’s roundup, Keith Davids and Ian Renshaw go back to where sports science began. In 1975, Liverpool Polytechnic launched the world’s first single-honours sports science degree at Byrom Street, Liverpool. It grew out of three scientists’ support work with Everton Football Club. As the 1986–89 cohort gathers in Liverpool for its 40th anniversary reunion, Keith and Ian trace how that small course shaped sports science across the UK and around the world. They talk about the people and places behind the early growth: Tom Reilly’s foundational role, Mike Hughes and Keith Lyons’s early notational analysis, and the first World Congress on Science and Football at Liverpool in 1987, which returns to the Albert Dock in 2027. They also cover the rise of BASES and the ECSS, and the post-Barcelona 1992 funding push that sent university staff into high-performance sport. Keith reflects on what that applied rush did to theory, and Ian raises the opposite problem: scientists who collected data from athletes and never gave anything back. The conversation then turns to what this history means now. They discuss the “copy and paste” problem of importing coaching models across cultures, why silos still hold back sports science courses, and the case for transdisciplinary support with the athlete at the centre. They make the case for curiosity as a career-long habit, and for knowing the history of your field so you can tell which traditions rest on real theory and which are historical artefacts.
October 22 · 56 min
Episode #112 Perform Worse, Understand Better - Ian & Keith Revisit Ana Ramos (Guest Review)
This week Ian Renshaw and Keith Davids go back to episode 21 from October 2024, our conversation with Ana Ramos, a volleyball coach, coach educator and researcher at the University of Porto. Keith was involved in Ana's PhD and hosted the original episode with Martyn; Ian comes to it as a listener. They start with how Ana's research was built: action research cycles (observe, analyse, plan, act, reflect) run across full competitive seasons, using mixed methods that combine numbers on team behaviour with what players say in focus groups and interviews. Ian picks up Martyn's point that the game is the best test of practice design, and Keith reminds us that learning can only be inferred from performance. They then work through Ana's coaching week: a day off to recover physically and emotionally, two days built from the last match, and the end of the week given to the next opponent, often in small 3v3 games with two balls in play. Along the way they cover the constraints continuum, Ana's six steps for building a practice task, individual success criteria inside a team session, why small-sided games can teach more than 11v11, Bernstein's repetition without repetition, comfort reps before big games, being brave enough to give some chaos, and Ana throwing her drill book in the bin every season. They finish with her season-long study, where a more complex game model made the team perform worse before they understood the game better, and with a discussion of knowledge of and knowledge about the performance environment. Listen to the original conversation with Ana in episode 21: https://www.buzzsprout.com/2354827/episodes/16010076 **References** - Ramos, A., Coutinho, P., Ribeiro, J., Fernandes, O., Davids, K., & Mesquita, I. (2020). Increasing tactical complexity to enhance the synchronisation of collective behaviours: An action-research study throughout a competitive volleyball season. *Journal of Sports Sciences*. https://doi.org/10.1080/02640414.2020.1794265 - Ramos, A., Davids, K., Coutinho, P., & Mesquita, I. (2022). Tracking relations between development of tactical knowledge and tactical behaviour: A season-long action research study. *Physical Education and Sport Pedagogy*. https://doi.org/10.1080/17408989.2022.2083099
October 8 · 40 min
Episode #111 # Do the Thing — Adam Singer on Periodisation of Goals, Luck, Trust, and Where Constrain-to-Afford Actually Holds Up
Part Two of this month's guest podcast: Ian Renshaw and Marco Perazzo (filling in for Keith Davids) continue the conversation with MMA coach Adam Singer (SBG Athens). Adam's whole programming philosophy compresses to three words — "do the thing," scaled for safety and variability, judged only by whether it helps his practice. The conversation covers what Adam now calls periodization of goals rather than periodization of constraints (broad and varied far from a fight, narrowing toward specificity as it nears), the staph infection that accidentally protected one of his fighters from a fight he'd have lost, the trust and responsibility Adam describes feeling on fight night once the cage door closes, and closes on the constrain-to-afford versus constrain-to-potentiate distinction Ian and Keith have been developing with Constraints Collective members this year — including where Adam thinks it holds up (striking) and where it doesn't (grappling, where seeing and doing are too tightly coupled to separate). This is Part Two of Two — Part One (aliveness, safety by design, the calf kick) is available now from October's Week One Guest Podcast. Read the companion blog: Do the Thing If you're getting value from our podcast check out our membership options and coaching community at www.theconstraintscollective.com where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective.
#110
October 1 · 59 min
Episode #110 Adam Singer Part One ("The Only Thing We Know Is What We Test"
The Only Thing We Know Is What We Test — Adam Singer on Aliveness, Safety by Design, and What the Calf Kick Proves About Perception This month's guest podcast: Ian Renshaw is joined by Marco Perazzo, filling in for Keith Davids, to talk with Adam Singer, who has coached mixed martial arts for close to thirty years at SBG Athens (Georgia, USA) and works by day as a biomechanical engineer. Adam's practice runs on a rule borrowed from mentor Matt Thornton: training is either alive, or it isn't — the moment a coach asks a student to modify their resistance, the exercise has become something other than sparring. The conversation moves through why Adam constrains the training room rather than the person to keep sparring safe, the 1990 Julio Cesar Chavez vs. Meldrick Taylor fight that shaped his position on head contact, why the calf kick still lands on experienced fighters after a decade of everyone seeing it coming, why he doesn't lean heavily on opponent film, and closes on the lack of a shared, written criteria behind Brazilian Jiu-Jitsu belt rankings. This is Part One of Two — Part Two continues in October's Week Two Podcast, covering Adam's actual session design principles and the constrain-to-afford versus constrain-to-potentiate discussion running through the Constraints Collective this year." Read the companion blog: The Only Thing We Know Is What We Test If you're getting value from our podcast check out our membership options and coaching community at www.theconstraintscollective.com where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective.The Only Thing We Know Is What We Test — Adam Singer on Aliveness, Safety by Design, and What the Calf Kick Proves About Perception
#109
September 25 · 33 min
Episode #109 The Six-Foot Pink Furry Dice - Ian & Keith's September Monthly Catch-Up
This month, Ian Renshaw and Keith Davids chatted about why sport keeps falling for the same trick: something happens to be nearby when a team wins, and within a season everyone else is copying it. Ian's anchor image is Clive Woodward's six-foot pink furry dice, the story he tells in his own presentations about the England rugby team's 2003 World Cup win and how people can be vulnerable to fads and fancies when they copy and paste without any critical analysis. From there the conversation runs through officiating, with Ian arguing (against the popular mood) that referees are getting more decisions right over time, not fewer, and that slowed-down video footage is "just a rendering" that can mislead coaches into reductionist analysis. The middle of the episode is the sharpest: marginal gains, non-linear systems, and a series of Guardian articles including an interview with Claire-Marie Roberts on pseudoscience creeping into elite sport, all converging on the same warning about short-term hacks in a sport awash with money. Keith introduces the idea of a "motif," a phrase that sounds like an explanation but avoids one, tested against two live examples: muscle memory and a nation's footballing "DNA," which Ian and Keith argue is really just a development system (Spain's, shaped by the University of Lisbon's complexity-science tradition, being a good example). They close on cricket, using Barry Richards's 1970s Gillette Cup footage to make the case for adaptability across eras and against early specialisation: you're a cricketer, footballer, rugby, hockey player first, before anyone decides your specialism. --- If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective. Support the running of the podcast at [patreon.com/TheConstraintsCollective](https://patreon.com/TheConstraintsCollective).
#108
September 17 · 44 min
Episode 108 Foxy's Long Way Round — Jay Carter on Ryan Fox, Late Specialisation, and the Open
This month's guest podcast: Ian Renshaw is joined by Jay Carter, Golf New Zealand's National Team Coach and host of the Talking Performance podcast (197 episodes and counting), for a conversation built around a clip Jay sent after listening to TCC's Güllich episode. Jay's own 2024 interview with Ryan Fox — republished this August after Fox won The Open Championship at Royal Birkdale — became the case study: a New Zealand sporting-royalty kid (father Grant Fox, All Black goal-kicker; grandfather Merv Wallace, Black Cap) who made First XI cricket and First XV rugby at King's College alongside Tim Southee, and didn't get serious about golf until university. The conversation moves through why "smash it" beat "be accurate" in Fox's early sporting intentions, the golf course used as an after-school playground before the game's popularity boom priced that out, why practicing to "feel better" isn't the same as practicing to get better, the transactional trap in paid coaching (and what it would take to actually get fired for being honest), boredom as a genuinely useful training constraint, and a caddying story from the Kazuma Kobori bunker at Royal Queensland that turns into a case study in broadening a player's affordances rather than narrowing them to "the right shot." Read the companion blog: Foxy's Long Way Round If you're getting value from our podcast check out our membership options and coaching community at www.theconstraintscollective.com where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective.
#108
September 17 · 44 min
Episode #108 Foxy's Long Way Round — Jay Carter on Ryan Fox, Late Specialisation, and the Open
This month's guest podcast: Ian Renshaw is joined by Jay Carter, Golf New Zealand's National Team Coach and host of the *Talking Performance* podcast (197 episodes and counting), for a conversation built around a clip Jay sent after listening to TCC's Güllich episode. Jay's own 2024 interview with Ryan Fox — republished this August after Fox won The Open Championship at Royal Birkdale — became the case study: a New Zealand sporting-royalty kid (father Grant Fox, All Black goal-kicker; grandfather Merv Wallace, Black Cap) who made First XI cricket and First XV rugby at King's College alongside Tim Southee, and didn't get serious about golf until university. The conversation moves through why "smash it" beat "be accurate" in Fox's early sporting intentions, the golf course used as an after-school playground before the game's popularity boom priced that out, why practicing to "feel better" isn't the same as practicing to get better, the transactional trap in paid coaching (and what it would take to actually get fired for being honest), boredom as a genuinely useful training constraint, and a caddying story from the Kazuma Kobori bunker at Royal Queensland that turns into a case study in broadening a player's affordances rather than narrowing them to "the right shot." --- **Read the companion blog:** [Foxy's Long Way Round](https://www.theconstraintscollective.com) If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective.
#107
September 11 · 31 min
Episode #107 The Bee Hotel Nobody Designed — Ian Renshaw & Keith Davids Review Woods, Richard, Martin & Cairney (2026)
This month's theory paper review: Ian and Keith dig into Woods, Richard, Martin & Cairney (2026), "Loosening Tightened Logics: A Comment on the Role of Affordances," published in New Ideas in Psychology, 83, 101289 — a paper that never mentions sport, and covers park benches, glass building facades, and a Brisbane street corner that turned itself into a shared garden without anyone designing it that way. The idea at the centre of it: every training environment sits somewhere on a tight–loose dial. Tight space prescribes its own use — a cone drill, a single technical model, a serve that must land in a taped box. Loose space supports activity that unfolds in ways nobody specified in advance — an adaptable small-sided game with no one correct solution. Most environments drift tight without anyone deciding it should happen, and the paper argues almost nobody notices until it's named. Ian and Keith trace the theory back to Gibson's concept of affordance, work through the paper's case study of a university building facade that became a free dance studio purely because of what its surfaces afforded, and land on the practical takeaway: a coach's job isn't to fill the room, it's to decide, session by session, how much of it to leave open. Companion blog: "The Bee Hotel Nobody Designed" · membership/community links to theconstraintscollective.com · Patreon support link.
September 3 · 1 hr 5 min
Episode #106 Nobody Talks About Failure at the Skate Park — Craig Harrison on Designing Rooms Where Getting It Wrong Is Cheap
This month's guest podcast: Ian Renshaw and Keith Davids are joined by Craig Harrison, who spent almost ten years running the long-term athlete development programme at AUT Millennium in Auckland and has just written a book, *Coach by Design*, about what he learned. Craig's central distinction splits environment design into two separate levers — structure (what the space lets a learner choose and perceive) and control (the force a coach applies to direct decisions on top of that) — rather than a single dial between drilled and unstructured training. The conversation moves through the skate park as the clearest picture of designing for "everyday risk," the Maori concept of Tuakana Taina and cross-age mentoring, the "coffee club" Craig ran to help parents make sense of a more exploratory-looking programme, and the "Bambi effect" — the temporary loss of coordination that comes with a fast growth spurt, and why it calls for more structure and control rather than less. Late in the conversation, Ian connects Craig's framework directly to this month's theory paper review of Woods, Richard, Martin & Cairney (2026) on tightened and loosened space — the same underlying question, worked at two very different scales. --- **Read the companion blog:** [Nobody Talks About Failure at the Skate Park](https://www.theconstraintscollective.com) If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective. Support the running of the podcast at [patreon.com/TheConstraintsCollective](https://patreon.com/TheConstraintsCollective).
#106
August 27 · 40 min
Episode 105 You Can Tell By The Stance - Ian & Keith's August Monthly Catch-Up
This month, Ian Renshaw and Keith Davids work through a run of stories that all land on the same idea: the environment you train in writes itself into your technique, whether anyone designs it that way or not. Ian opens with a story from one of the Collective's members in India: a Mumbai coach, Amladi, who could sort a cricket trial into two groups just by their batting stance, correctly picking out which players had grown up on underarm gully cricket in the lanes of Dadar, Matunga and Shivaji Park, and which had grown up playing the overarm version around South Mumbai and the suburbs. Keith connects it to skill adaptation and the idea of learning to address the performance environment, not just coordinate an action within it. From there the conversation moves through Pete Arnott's work with Scottish golfers, whose short, tight links courses have produced accurate but short hitters, and how he manipulates practice environments to prepare players for different tour conditions. Keith shares a video sent by a colleague in Buenos Aires of Estudiantes de la Plata's La Osha training ground, deliberately left to the weather since the club's 1970s championship years, where academy players learn to control the ball on a surface that looks nothing like a manicured pitch. Ian follows with the Indian hockey team that lost its edge in stick skill once the game moved from rough turf to astroturf, Pele's adjustment to boots after growing up playing barefoot, and two stories from the London 2012 Olympics, a long jumper who had actually practised jumping into the wind, and a pole vaulter who trained indoors and got caught out by it. Keith closes on why "closed" and "open" skill is a less accurate way to describe this than tasks with more or less information, and more or less stability. --- If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective.
#104
August 21 · 41 min
#104 Mark O'Sullivan_August Guest Review
Ian Renshaw and Keith Davids revisit Episode 72 with Mark O'Sullivan (Norwegian School of Sport Sciences) — why coaches are rarely taught to observe, a goalkeeping skill that transferred in from Gaelic football with no instruction at all, and the coach's compass and player's compass Mark built as a discussion framework for task design.
#103
August 14 · 1 hr 7 min
#103 What Makes a Champion — Ian Renshaw & Keith Davids Review Gullich et al (2021)
# What Makes a Champion — Ian Renshaw & Keith Davids Review Gullich et al (2021) In this theory episode, Ian Renshaw and Keith Davids dig into Gullich, McNamara, and Hambrick's 2021 meta-analysis "What Makes a Champion: Early Multidisciplinary Practice, Not Early Specialization, Predicts World-Class Performance" — 51 studies, roughly 6,000 athletes, 15 countries, and a clear finding: world-class athletes specialised later, practised more broadly across other sports as children, and accumulated less total practice time in their main sport than national-level athletes who never quite made it. Keith takes the findings seriously and then asks what a meta-analysis of published, formally-coached athletes can never capture — the backyard cricket, Brazilian futsal, and Pacific Islands rugby pathways that produced champions without ever appearing in a peer-reviewed dataset. Ian tells the story of a talented under-17 cricketer who just wanted one day off to go surfing — a junior-senior paradox playing out in real time. And the conversation lands on why adaptability, not specialisation, may be the trait elite sport increasingly selects for. A grounded, practical look at one of talent development's most cited — and most misread — papers. --- If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective. Support the running of the podcast at [patreon.com/TheConstraintsCollective](https://patreon.com/TheConstraintsCollective).
#102
August 7 · 54 min
#102 Twenty Minutes From the Sea — Chris Button on Why the Pool Doesn't Prepare You for Open Water (Part Two)
In Part Two of this milestone two-part conversation, Ian Renshaw continues talking with Professor Chris Button (University of Otago) — this time about water safety and drowning prevention. New Zealand has one of the worst per-capita drowning rates in the world, and Chris argues the reason isn't swimming ability: it's that people learn to swim in a pool, an environment that shares almost nothing with the open water that actually threatens them. Chris walks through a study that puts the problem in miniature — taking swimmers out in a boat on calm water and asking them to judge the distance back to shore by eye. Good swimmers judged it reasonably well; poor swimmers were badly wrong, and consistently overestimated the distance, right before being asked to swim it. His tested fix is disarmingly simple: stop teaching open-water skills in a pool, and take children to the beach, the lake, or the river instead — concentrated blocks of real-environment practice that held up on retention three months later and translated into genuine self-rescue skills. Part Two of Two — Part One aired as Episode 100, tracing the PhD finding Chris still sees coaches average away. --- If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective. Support the running of the podcast at [patreon.com/TheConstraintsCollective](https://patreon.com/TheConstraintsCollective).
#101
July 31 · 52 min
#101 Nobody Plays in Perfect Conditions — Ian & Keith's July Monthly Catch-Up
In this month's catch-up, Ian Renshaw and Keith Davids work through a run of ideas connected by a single question: how do you prepare an athlete for the conditions, schedules, and pressure you can't control? Keith breaks down why the NBA's 82-games-in-170-days calendar has pushed coaches toward short, opponent-specific practice pockets instead of generic repetition, and Ian connects it to a piece of single-session design work he's been developing from psychology and psychiatry literature — what can actually change if you only get one go? The conversation moves through the constraints continuum, the pair's own distinction between 'constraining to afford' and constraining to 'potentiate', and a run of stories — a Silver Ferns netball shooter whose in-house scoring system took the pressure off a stat the opposition had learned to exploit, and England's Under-21s, where a rehearsed "stay in the green" call pulled a player back from the edge of a red card. Keith closes by naming the amber zone properly — dynamical systems theory's region of metastability — and why the job isn't to coach uncertainty out of performance, but to make sure athletes have already met it once before it counts. --- If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective. Support the running of the podcast at [patreon.com/TheConstraintsCollective](https://patreon.com/TheConstraintsCollective).
#100
July 17 · 37 min
#100 Use The Funnel, Not the Average Value: Chris Button on the PhD That Almost Wasn’t (Part One)
In this landmark 100th episode, Ian Renshaw and Keith Davids are joined by Professor Chris Button from the University of Otago, whose research has ranged from ball-catching biomechanics to basketball free throws to, more recently, why so many people drown. Chris's route into research wasn't inevitable — he turned down a PhD scholarship for a job as a wine specialist before one line from Keith ("your PhD is your passport anywhere") talked him back onto the academic path. The conversation traces the finding buried in that PhD that coaches still routinely average away: when Chris's group-level statistics on ball-catching showed no differences between participants, despite him watching them move differently in real time, the fix wasn't better instrumentation — it was refusing to average, and analysing individuals as individuals. Years later at Edinburgh, the same logic showed up in basketball free throws: novices varied early in the shot, experts showed a funnel, real variability at the start narrowing as the ball approached release. The skill wasn't the absence of variability, but the timing of when it was allowed to matter. They also dig into the interdisciplinary Manchester Metropolitan University cohort that shaped Chris's approach of arguing between frameworks rather than staying inside one — a method that carried him to Otago and, eventually, toward water safety research. Part One of Two — Part Two continues in August's Week One Guest Podcast. --- If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective. Support the running of the podcast at [patreon.com/TheConstraintsCollective](https://patreon.com/TheConstraintsCollective).
#99
July 10 · 1 hr 20 min
The Video Doesn't Show What Happened — Ian Renshaw & Keith Davids Review Schütz, Betsch & Plessner (2026), with guest Scott Russell
An emergency episode: VAR was dominating the World Cup news cycle, and a paper had just landed asking the exact question everyone was arguing about. Ian Renshaw and Keith Davids review Schütz, Betsch & Plessner's "The Impact of Video Speed on Intention Attribution" (Psychology of Sport & Exercise, 2026) — four experiments showing that slowing footage down increases how intentional an action looks, peaking at around 1.5 seconds before easing off again. For the first time on a theory paper episode, they bring in a guest: Scott Russell, a former referee now researching how officials incorporate social expectations into their decisions. Keith reframes the paper's cognitive explanation through an ecological lens — it's not just processing time, it's a change in the structure of information available to the viewer. Scott argues that video, even in real time, is never the event itself, just "the best artist's impression." Ian draws on his own occlusion research to show how arbitrary a single video frame really is. And the conversation lands on practical recommendations: closed, specific questions for VAR reviews, standard-speed footage as the default for disciplinary decisions, and rugby league referee Ashley Klein's decision to uphold a send-off despite video review as a model for trusting the on-field call. A timely, sharp look at why the frozen frame keeps lying to us in the same direction, every time. --- If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective.
#98
July 3 · 1 hr 5 min
#98 From the Pitch to the Algorithm — with Ben Teune
# From the Pitch to the Algorithm — with Ben Teune In this episode, Ian Renshaw and Keith Davids are joined by Ben Teune, Sports Scientist and Analytics Lead at the WTA (Women's Tennis Association), whose PhD work — embedded with the Western Bulldogs AFL club at Victoria University — tackles a problem every constraint-led coach runs into: you're told to "manipulate the task," but rarely given a principled way to decide what to manipulate. The conversation covers how to give representativeness a number using the specificity index and association rule mining, why looking at one constraint at a time is misleading when machine learning can surface which constraint *combinations* actually produce breakthroughs or breakdowns, and how clustering algorithms can classify drills by variability so coaches can build sessions with intentional exploration versus exploitation phases. Ben also walks through his "outnumber" research — the two distinct solutions players find when given an extra player, and how a coach can use that insight to shift team behaviour with a simple time constraint. Underpinning it all is Ian's standout line of the episode: start with the coaching problem, then find the data that answers it — not the other way around. --- If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective. Support the running of the podcast at [patreon.com/TheConstraintsCollective](https://patreon.com/TheConstraintsCollective).
#97
June 26 · 42 min
#97 Round Up 11 — Your Team Was 29 Points Up. Here's Why That's the Dangerous Part.
The San Antonio Spurs led Game 4 of the 2026 NBA Finals by 29 points and lost it on a tip-in with 1.2 seconds left — the biggest comeback in Finals history. Ian Renshaw and Keith Davids use it to argue momentum isn't a mindset problem but a stable attractor state (drawing on Gernigon, Briki & Eykens' dynamical systems model of psychological momentum) that has to be deliberately broken, not willed away. They trace the same idea through hydration-break goal-scoring stats, Shane Warne's between-ball theatre, the "plus" between cricket deliveries, and a community AFL warm-up that was quietly working against its own players. This month's free round-up pulls together June's guest episode (Michael Richardson), theory paper, and Daniel Lycett guest review. Members get the full monthly catch-up recording, early access to next month's guest conversation, and the hosts' position statement on "Constrain to Afford or Constrain to Potentiate?"
#96
June 19 · 51 min
Episode #96 Daniel Lycett Guest Review
Keith and Ian go back through Daniel Lycett's PE curriculum redesign from episode 81 — and pull apart what was really going on underneath it: context, donor sports, and designing tasks people can actually succeed at. Along the way: Lego therapy for autistic learners, team chess, a French badminton study, and why Keith won't smash newer players off the pickleball court.
#95
June 12 · 49 min
Before the Ball Moves: How International Footballers Gain Their Advantage
#95 Before the Ball Moves: How International Footballers Gain Their Advantage In this episode, Ian Renshaw and Professor Keith Davids explore the tension between practice tools and movement variability. Using Ian's experience with a golf putting mat as a springboard, they examine how template-based practice can encourage rigid repetition and ask whether this conflicts with Bernstein's principle of "repetition without repetition." The conversation covers degrees of freedom — how beginners freeze their movements and how skilled performers learn to exploit them — drawing on Ludovic Seifert's fascinating research with ice climbers and the 1964 work of AJ Templeton, who was quoting James Gibson on reading greens long before ecological dynamics had a name. --- If you're getting value from our podcast check out our membership options and coaching community at [www.theconstraintscollective.com](https://www.theconstraintscollective.com) where you can access podcast summaries, narrated presentations, early release podcasts and monthly online meet ups with experts from the Constraints Collective. Support the running of the podcast at [patreon.com/TheConstraintsCollective](https://patreon.com/TheConstraintsCollective).

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