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Get Bio Insights Reframing Efficient Human Movement with Dr. Juris

Most fitness facilities sell sweat. They sell calories, heart rate zones, and intensity. What they're not selling — and what's costing them members — is the chassis. And a high-output engine on a leaky chassis doesn't scale. It breaks down. In this third conversation with Dr. Paul Juris (PhD, CSCS, former Director of Science & Research at Cybex, NBA performance consultant, PGA advisor), we go deep on movement efficiency — and why everything you think you know about it might be wrong. We unpack: Why 'moving efficiently' and 'burning more calories' are not the same goal — and when inefficiency is intentional The EMG trap: why more muscle activation is often a sign of dysfunction, not performance The 90-90 lunge myth — the most common exercise model on YouTube that is quietly destroying the back knee Force production vs. force absorption: the ACL research from Beth Israel that changed how the NFL tests athletes today Co-contraction, the BOSU ball, and why 'tighten your core' is one of the most damaging cues in fitness Why human beings are fundamentally asymmetrical — and why bilateral training as the default is a mistake Gabriele Wulf's Constrained Action Hypothesis and why external focus beats internal cues every time How to train for time-based endurance, not rep-based volume — and why skiing 2,000 vertical feet isn't 15 reps This is not a conversation about hacks. It is about the foundational science that separates facilities that retain members from the ones that churn them. Dr. Juris spent decades in the NBA, PGA, and at Cybex building performance frameworks that hold up under real load. This episode is the synthesis of that work, translated for operators, coaches, trainers, and athletes who want to understand what efficiency actually means — and how to measure it. CHAPTERS 00:00 — Welcome back: why we pinned this topic last episode 01:01 — What movement efficiency actually means (and what it doesn't) 03:53 — The engine vs. the chassis: why great conditioning on a broken frame doesn't work 06:29 — Core tightening, the PGA, and the cue that inhibits the swing 09:57 — Video analysis, apps, and the limits of casual observation 12:38 — Lunge Logic: why the 90-90 is the most inefficient way to lunge 16:55 — EMG, co-contraction, and the BOSU ball — 70% force loss explained 23:13 — The hop-and-stop test: how force absorption predicts injury return 28:39 — Tolerance work: training the system to sustain, not just peak 32:56 — Asymmetry is normal — and bilateral training is overrated 39:07 — Floor design, equipment, and what actually matters in a facility 47:44 — Assessments, red ocean competition, and why boutiques are winning 54:11 — Behavior, psychology, and the variable nobody talks about CONNECT & RESOURCES BioInsights Consulting: www.bioinsights.com Subscribe for weekly conversations at the intersection of exercise science and commercial fitness The Bio Insights YouTube Channel explores how our body’s data relates to health, wellness, and performance. We all face choices, but sometimes fear of the unknown holds us back from new opportunities and reaching our best. You will hear stories from successful individuals to inspire better strategies for success in business, exercise, technology, diet, and life overall. Welcome to our YouTube channel! We aim to help you seize the opportunities that come your way. Follow us: https://x.com/SportTechReport   / sporttechreport   www.bioinsights.tech