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This weeks blog is by Jason Karp – Run Slower to Run Faster
When I was a kid, I loved watching the TV sitcom, I Love Lucy. Lucille Ball was one in a million. There was a famous episode during which Lucy and her friend Ethel work at an assembly line, where they were assigned to wrap pieces of chocolate as they came down the conveyor belt. At first, the job was easy. The chocolate pieces were coming down the belt at a slow enough speed that Lucy and Ethel could easily grab each piece of chocolate and wrap it.
Then the speed of the conveyor belt quickened, and Lucy and Ethel had their hands full. Literally. They couldn’t wrap each piece of chocolate in time before the next piece was already passing them, so they grabbed handfuls of chocolate and shoved them in their pockets and in their mouths. It was hilarious, and that episode became a famous part of TV history.
Little did the director of that scene know that he revealed the secret to how to become a better distance runner.
Clearly, increasing the speed of the conveyor belt didn’t work. Lucy and Ethel couldn’t keep up with the pace of the belt. If the company that Lucy and Ethel worked for wanted to produce more wrapped chocolates in less time, they should have had more factories with more assembly lines and more workers like Lucy and Ethel wrapping chocolates coming down the multiple conveyor belts.
Deep inside your athletes’ muscle fibers, those factories are the mitochondria, and those workers—the Lucys and Ethel —are the enzymes that catalyze the chemical reactions involved in aerobic metabolism. The more mitochondria a runner’s muscles have, the greater his or her muscles’ capacity to use oxygen and the faster pace he or she will be able to sustain. The most efficient way to make more mitochondria—more factories, more assembly lines, and more workers—is to run more. And to run more, runners must slow down their runs, because there is an inverse relationship between training intensity and duration: The faster one runs, the lower the total amount he or she can run. In addition to the slower pace of easy runs enabling runners to increase their weekly mileage, they also decrease the chance of injury and can get more out of their harder workouts because their legs will be less fatigued.
The number and size of mitochondria in the muscle fibers is sensitive to the volume of work performed. When the factories are stressed because of greater demand, more and larger factories will be built to increase their supply to match the demand. If those pieces of chocolate kept coming down the conveyor belt long after the 30-minute I Love Lucy episode was over, more conveyor belts, and more and larger factories to hold those conveyor belts, would have been built to keep up with the demand for chocolate.
One of the biggest mistakes runners make is thinking that to run faster in races, they need to run faster in workouts. So, they run their workouts faster than their current fitness level dictates. I once coached a college runner who ran 19 minutes for cross country 5K, and she told me she wanted to be trained like a 17:30 5K runner. So, I told her to run a 17:30 5K and then I’ll train her like a 17:30 5K runner. Races, which tell the runner and you his or her current level of
fitness, dictate the training speeds, not the other way around. Distance runners don’t do workouts to practice running faster; they do workouts to improve the physiological characteristics—to make more assembly lines—that will enable them to run faster in the future. Even if it’s not as funny or as glamorous as the I Love Lucy chocolate episode.