I think I got my jiu jitsu black belt with about 2,500 hours on the mat, say 5 hours a week on average for 52 weeks for 10 years. With a more effective teachin

I think I got my jiu jitsu black belt with about 2,500 hours on the mat, say 5 hours a week on average for 52 weeks for 10 years. With a more effective teaching model, I believe one could achieve the proficiency needed for a black belt in 2/3 of the time. However, this does not mean becoming a name on the world stage, for which much more talent and possibly more hours of practice are needed: talent saves many hours of practice that are instead needed by less talented practitioners, assuming that the latter can reach the level of talented people even in the limit of infinite time and youth.