cal, perhaps you can take his greatest rival ’s word for it. “ His DNA ”, Rafael Nadal says, “ seems perfectly adapted to tennis. ” During the amateur age and the early decades of professionalism, it was possible to gain a significant edge through absolute hard work. But when a sport es fully professional and global, and nurture equ a ls, nature once again has the upper hand . In youth sport, evidence is increas ing that the 10,000-hour practice , based ona questionable experiment of the early 1990s, is now doing serious harm. First, it has misled kids who end up depressed and confused because they did not, after all, e the new Tiger Woods, despite putting in the hours. Secondly, it has strengthened the false belief s of another type of tiger: the m other variety. Parents increasingly view
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