Dr. Matt Jordan, performance scientist at the University of Calgary — joins Alex to introduce muscle span: the longevity metric most people have never heard of. Together they unpack why muscle power predicts your independence as you age, and why it's never too late to build it.
In this episode of Cascaid Effects, host Alex Galeazzi sits down with Dr. Matt Jordan,
performance scientist and researcher at the University of Calgary, to introduce a concept
that should be part of every longevity conversation: muscle span.
Dr. Jordan has spent 20+ years working with Olympic and professional athletes. What he's
learned applies directly to how all of us age — and whether we'll be able to live on our
own terms at 80.
TOPICS COVERED
[0:00] Introducing muscle span — why your muscles have a lifespan of their own
[7:59] The social barriers blocking access to resistance training
[11:41] Who should care about muscle health — a breakdown by life stage
[13:56] Early sports specialization and why kids today are weaker than 40 years ago
[19:40] It's never too late: resistance training outcomes in adults aged 94+
[26:18] Dr. Jordan's mother: reversing type 2 diabetes and deadlifting 100lbs in her mid-70s
[33:27] Muscle strength vs. muscle power — and why the difference determines your independence
[44:40] Mechanical biomarkers: what your blood panel can't tell you
[34:29] Lab tour: force plates, the robotic leg press, and the rapid force dynamometer
[56:57] Rapid force capacity — the metric that governs fall recovery and ACL ruptures
[1:01:46] Power across the lifespan: from peak output in your 20s to the threshold for daily living
[1:03:35] Plantiga: turning your gait into a vital sign
[1:07:02] Walking patterns as an early warning for cognitive decline and cardiovascular events
[1:08:41] Gabe Landeskog's comeback — how the lab helped an NHL captain return from injury
Dr. Matt Jordan — Performance Scientist, University of Calgary
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