Gifted Issues Discussion homepage Forums General Discussion Practice Makes Perfect, If Your Genes Play Along

Like many others who read Malcolm Gladwell’s book “Outliers” when it came out five years ago, I was impressed by the 10,000-hour rule of expertise. I wrote a column (for a different publication) espousing the rule, which holds that to become a world-class competitor at anything from chess to tennis to baseball, all that’s required is 10,000 hours of deliberate practice.

David Epstein has convinced me I was wrong. His thoroughly researched new book, “The Sports Gene,” pretty much demolishes the 10,000-hour rule -- and much of “Outliers” along with it.

The practice-makes-perfect theory is certainly inspiring. In 2009, and after reading Gladwell’s book and some of the associated research, a 30-year-old man named Dan McLaughlin decided to quit his job as a photographer, determined to practice golf for 10,000 hours and turn pro -- even though his previous experience consisted of just two trips to a driving range as a child. He now practices six hours a day, and is scheduled to hit 10,000 hours in late 2016.

Epstein’s book suggests that McLaughlin better have a backup plan, because, while real elite athletes have put in plenty of practice time, their aptitude is enhanced by their genes.

Genetic Clues

If 10,000 hours of deliberate practice is necessary and sufficient for world-class performance, Epstein asks, why do some people reach the master level in chess after 3,000 hours while others require 23,000? The average number of hours needed for many pros may be about 10,000, but it varies widely.

The reason for the variation is genetic, Epstein says. In one study, researchers at Indiana University, University of Minnesota, Texas A&M University, Washington University, Pennington Biomedical Research Center, and Laval University in Quebec measured changes in VO2 max, an indicator of aerobic capacity, in people who followed a strict exercise regimen. About 5 percent of participants boosted their VO2 max levels by an astonishing 40 to 50 percent. Another 5 percent, however, saw almost no gain at all, and the rest fell in between.

The clincher was that, although a subject’s rate of improvement had little to do with how fit he or she was to start with, members of a family showed somewhat similar gains. The rate of improvement varied 2 1/2 times as much between families as within families, highlighting the importance of genes in determining how much improvement occurred. As one of the researchers told Epstein, “Unfortunately for the low responders in these studies, the predetermined (genetic) alphabet soup just may not spell ‘runner.’”

The research does not suggest that genes are dominant and training is irrelevant; instead, it says that the benefit from training is partially driven by genetics, so that a combination is required for top performance.