The report, prepared by The Baseball Performance Lab (BPL) and The Golf Lab for the Los Angeles Dodgers, presents the first formal, physics‑based comparison of ground reaction force (GRF) data collected with identical dual force‑plate systems from elite golfers (PGA Tour, Long Drive) and professional baseball hitters. Using a shared measurement platform, the analysis breaks down six force components (vertical, lateral shear, anterior‑posterior shear, free moment, net torque, and rate of force development) for back and front foot across multiple swing/stride types. Key findings include: (1) rotational torque converges among top power producers – MLB hitters average 307 Nm, essentially matching Long‑Drive specialists (320 Nm); (2) total vertical force is comparable (golf 178–260 % BW, baseball ~239 % BW) despite different foot contributions; (3) lateral braking is the primary biomechanical differentiator, with baseball front‑foot lateral shear 3–4 × higher than golf (≈84 % BW vs 20‑28 % BW); (4) baseball generates forces via a reactive landing/braking mechanism with a much faster timeline (contact in ~150 ms, braking window 43 ms, RFD ≈3,660 % BW/s) versus golf’s proactive push‑off (~330 ms, RFD ≈2,000 % BW/s); (5) force‑generation mechanisms, stance geometry, and swing‑plane angles drive the observed differences. The report translates these biomechanical insights into sport‑specific training recommendations, emphasizing eccentric absorption and lateral deceleration for hitters and concentric push capacity for golfers. Additional sections detail implement physics, a cross‑sport phase mapping (P‑Positions), and force‑budget allocation charts that illustrate how each population distributes effort across the six components.
Topics
Cross‑Sport GRF Dataset & Methodology
Description of the shared dual force‑plate system, population sample sizes (PGA Driver N=57, Long Drive N=15, Baseball N=85), and the physics‑based analytical framework enabling direct comparison.