Repetition Makes Perfect [1.1]
In the 1990s, a team of German psychologists revealed that it takes 10,000 hours of deliberate practice to become a professional violinist. [1.2] A similar study concluded it also takes almost just as long to become a great cigar maker.  New workers in a cuban cigar factory take around 25 seconds to make one cigar. [3.5] After 100,000 repetitions, it takes them just 15 seconds [4.3] and after 1 million only 8. [5.1] To reach peak performance, it takes 7 years and 10 million repetitions of the same hand movements. [5.4] Not practice, but repetition makes perfect. [P] Professional football teams therefore play daily what the Spanish players call "Rondo".  Piano players warm-up with Scales and Arpeggios.