David Kerin is a former collegiate coach, USA Track and Field national team administrator, and performance consultant. David brings a refreshingly unconventional lens to some of the sport's most persistent challenges. His articles on '2D, 2.5, 3D Coaching' and 'Fixing the Right Problem' and most recently, developing a provisional patent for an innovative movement analysis system shows that he has never stopped asking the questions others overlook. Topics 0:00 – Introduction — David's background as a collegiate coach, USA Track & Field national team development administrator, and current consultant working across multiple sports 5:10 – Why Biomechanics? — What drew David deeper into the science of movement, why track and field's objectivity makes it the perfect laboratory, and the mentors who helped shape his thinking 8:00 – Fixing the Right Problem — Why the flaw you see is never the root cause, and how to work backward through a performance sequence to find the real breakdown point 13:00 – The High Jump Curve Problem — Why athletes drift instead of committing to the curve, the "lean is a byproduct" principle, and how poor curve mechanics have quietly reshaped the event 17:00 – 2D Thinking vs. 3D Reality — Why coaches and scientists analyzing three-dimensional movement through a two-dimensional lens creates critical blind spots, and David's concept of "2.5D" as a practical stepping stone 22:00 – The Third Dimension in Sprinting — Why foot orientation and lateral placement are being overlooked in sprint analysis, even at the elite level 26:10 – US Athlete Development — The structural tensions in NCAA track and field, the cost of prioritizing recruitment over development, and how USA Track & Field's Talent Protection Program tried to bridge the post-collegiate gap 38:25 – Whole, Part, and When to Intervene — When to isolate components vs. train the whole event, why stabilization matters more than early adaptation, and the danger of over-coaching innate movement patterns 47:00 – Start Point Geometry in High Jump — The counterintuitive truth about why a tighter start point along the bar axis makes curve mechanics worse, not better 51:27 – Dick Fosbury and a 50-Year Stagnation — Why Fosbury's 1968 technique still benchmarks elite collegiate high jumping today, and why high jumpers sustain career-ending injuries at a far greater rate than pole vaulters 57:00 – Body Type, Force, and Career Longevity — What Jonathan Edwards, Mutaz Barshim, and Sotomayor reveal about the relationship between mass, force application, and how long a body can sustain elite performance 1:03:12 – How to Reach David — David's open-source approach to mentorship and how coaches and athletes can get in touch Contact David: dkerin@kerinperformanceinsights.com Support the show
