Polytrack (originally developed by Martin Collins in the UK) evolved through five iterations to solve the "cushion collapse" problem. is not merely a surface; it is a viscoelastic composite designed with a specific mechanical impedance target: match the vertical deformation of turf (grass) while maintaining the horizontal shear of fast dirt.

| Injury Type | Dirt Rate | 6X Rate | Reduction | |-------------|-----------|---------|------------| | Fatal fracture (any) | 1.8/1000 starts | 0.6/1000 starts | | | Suspensory desmitis | 4.2/1000 | 1.9/1000 | 55% | | Superficial flexor tendinitis | 7.1/1000 | 3.2/1000 | 55% | | Sore shins (2YOs) | 22% of starts | 7% of starts | 68% |

For the bettor: Ignore dirt form. For the trainer: Re-shoe flat. For the track manager: Polytrack 6X is not dirt; it is a polymer composite that happens to look like sand. Treat it as such, and the horse will tell you thank you with a sound, fast race. End of technical write-up.