The Science of the Golf Swing: Center of Mass, Fascia & Speed with Davide Bertoli

Mark Immelman is joined by David Bertoli (aka “Davide”) for a deep, visual-first breakdown of how the golf swing actually works in 3D—not as frozen “positions,” but as moving phases driven by what the body is doing internally. David shares how his team built a 3D system that reveals the skeleton, muscles, and fascia in motion—so golfers and coaches can stop chasing a Rory/McIlroy “look” and start optimizing their movement pattern. A major focus is David’s framework: the Six Phases of the Golf Swing, built around Center of Mass (COM) movement + Anatomy Trains / fascia chains. They explore why the pelvis is the engine, how COM moves (horizontally and vertically), why maximum unweighting matters for speed, and how “carefree” phase-based movement beats “careful” position-chasing every time. ______________________ Brought to you by Pinnacle/Synovus and the USGA. ______________________ 00:00 Intro + why 3D is unlocking new understanding 01:35 David’s 3D project 02:20 “PEACE system” vs Six Phases 04:00 Why limitations create compensations 05:05 COM vs COP 07:10 Pelvis as the engine + COM/pelvis link 08:10 COM track explained 11:05 R3/R4 transition 12:35 Why max unweighting is lower than the address 13:40 R4 to R5: faster “up” 18:10 Anatomy Trains + fascia explained 21:40 Why 2D still helps 22:05 The Six Phases visuals 24:35 Toughest students to coach 27:10 “Positions make you careful / Phases make you carefree” 29:20 Tour swings 30:15 Long drive timing 33:05 Phase 6 34:35 Lead shoulder vs right shoulder 36:00 Eccentric load #1 39:10 Eccentric load #2/#3 41:05 Applying it under pressure 42:10 Where to find David + 3D Golf Decoded certification ______________________ STREAMING: On the Mark is available on Apple Podcasts, Spotify, Stitcher, Google Podcasts and wherever else you listen to podcasts. ABOUT ON THE MARK: Mark’s knowledge, insight and experience have made him a sought-after mind on the PGA and European tours. Through his career, he has taught and/or consulted to various Major Champions, PGA Tour winners and global Tour professionals such as: Larry Mize, Loren Roberts, Louis Oosthuizen, Patton Kizzire, Trevor Immelman, Charl Schwartzel, Scott Brown, Andrew Georgiou and Rourke can der Spuy. His golf teaching experience and anecdotal storytelling broadcasting style makes him a popular host for golf outings. SOCIAL MEDIA Follow Mark on X: https://x.com/mark_immelman Follow Mark on Instagram:   / mark_immelman   Follow Mark on Facebook:   / markimmelmangolf   WEBSITE: Read top-notch golf content from Mark at https://markimmelman.com ______________________ #golf #MarkImmelman #PGA #PGATour #golfpro #golftip #golfcoach