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A nutcracker that uses elastic energy

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Massimo

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2,496,839 次观看 • 9 个月前 •via X (Twitter)

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Blake Brown (Blake Brown) lives mid–upper 90s and has touched 101 mph at 6’0, 195 lbs while carrying 20–25% body fat through his midsection.⁠ ⁠ Does he throw hard in spite of that… or because of it? ⁠ ⁠ When you rotate at 95–100+ mph speeds, your trunk isn’t a rigid lever. It’s a deformable system— fascia, fat, muscle, viscera — all behaving with fluid-like properties. ⁠ ⁠ So here’s the why behind the ‘velo pouch’: ⁠ ⁠ 1. Rate-Dependent Behavior Viscoelastic tissues (muscle, fascia, fat, viscera) display time- and rate-dependent properties.⁠ -Low strain rates (walking, slow lifting): tissues deform and dissipate energy, acting as dampers that absorb shock and protect joints.⁠ -High strain rates (explosive trunk rotation): the same tissues stiffen non-linearly, behaving more like elastic springs. Instead of leaking energy, they store and recoil at the precise velocities required for throwing.⁠ ⁠ 2. Elastic Storage & Release⁠ As the trunk rotates, fascial slings that spiral around the torso are loaded. This deformation increases strain energy within the system. At pitching-level strain rates, those tissues recoil elastically, amplifying rotational velocity and contributing to the rapid acceleration of the arm.⁠ ⁠ 3. Rotational Energy Transfer⁠ Performance hinges on efficient rotational energy transfer. A more compliant torso allows greater torsional deformation (similar to wringing a towel), increasing elastic loading before recoil. Additional soft tissue mass distributes rotational forces across a larger surface area, smoothing out energy transfer through the chain and reducing localized energy leaks.
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