21+mph+keju

Why the specific emphasis on "21+"?

In the high-octane world of canine disc athletics (commonly known as "Disc Dog" or "Updog"), statistics like hang time, catch radius, and YAC (Yards After Catch) get thrown around constantly. But among the true elite handlers and their four-legged flyers, there is a single, obsessive benchmark that separates the weekend warriors from the world champions: 21+mph keju . 21+mph+keju

In response, the International Disc Dog Handlers Association (IDDHA) introduced a 21+ mph Keju waiver in 2025. Any team attempting a speed-checked catch over 21 mph in the "Speed Round" must sign a digital liability waiver and post a pre-run vet check. Why the specific emphasis on "21+"

Judges are now using AI-assisted instant replay (the DiscScan system) to measure catch velocity. Why? Because the 21+ mph keju is the only move that forces a "negative split" in the dog’s heart rate. A dog that executes a 21 mph catch will spike to 240 BPM, then drop to 140 BPM within 6 seconds. That neuro-physiological reset is what allows the dog to perform a second high-velocity catch later in the 90-second routine. In response, the International Disc Dog Handlers Association