This Podcast presents a technical evaluation of a golfer’s putting performance using high-speed ball-roll analysis. The focus is on how efficiently the ball transitions from impact into true roll, defined as pure forward rotation without skidding or bouncing. Objective metrics such as launch angle, spin rate, skid distance, and true roll distance are used to assess stroke efficiency and equipment suitability.

The analysis shows that although the basic stroke mechanics were solid, the ball consistently reached true roll later than optimal. This delay was primarily caused by unintentional backspin and vertical instability immediately after impact. These effects reduced predictability in distance control and increased sensitivity to green conditions.

Launch angle is identified as the most critical variable. Because a golf ball rests in a shallow depression (“nest”) created by its own weight, it requires sufficient vertical lift to exit cleanly. A launch angle below 0.75° traps the ball in this depression, increasing friction and causing an inconsistent start. Conversely, a launch angle above 2.5° sends the ball momentarily airborne, leading to bounce and delayed roll. The optimal window between 0.75° and 2.5° minimizes both friction and bounce. A measured launch angle of approximately 1.55° is considered technically sound and well within this ideal range.

Spin profile strongly influences the transition to true roll. Backspin (negative RPM) forces the ball to skid before rolling forward, extending the unstable phase after impact. This skidding increases distance variability and susceptibility to surface irregularities. Immediate forward or neutral spin shortens the skid phase and allows the ball to stabilize earlier.

Skid and bounce metrics quantify horizontal sliding and vertical instability after impact. Excessive skid prolongs the period during which the ball is affected by grain, slope, or moisture. Bounce prevents continuous surface contact and delays true roll until the ball fully settles.

True roll distance serves as a summary indicator of efficiency. True roll is achieved when the ball completes one full rotation every 5.25 inches of travel. An efficient stroke reaches this state within approximately 6–8 inches. Longer distances indicate energy loss caused by excessive loft, poor strike location, or insufficient forward spin.

Shaft angle and impact mechanics are the primary input variables controlling these outcomes. Inconsistent shaft lean alters dynamic loft, producing variable launch and spin conditions even with identical stroke speed. A stable, forward-leaning shaft position promotes consistent launch, reduces backspin, and improves repeatability.

Overall, the report emphasizes that precise measurement and data-driven adjustments are essential for optimizing putting performance, outperforming intuition-based feedback in both equipment fitting and coaching decisions.

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