U.S. Open tennis match, courtesy of Wikipedia.
The Wall Street Journal reported that the reason Novak Djokovic has won 41 straight matches this year is that he is allergic to gluten and has removed it from his diet. The streak included 4 wins over Nadal and 3 over Federer, and was bested only by John McEnroe’s 42 straight wins in 1984. Perusing the article comments makes it clear that many people believe that only drugs can dramatically improve performance. It also reports that Djokovic also jettisoned other unhealthy food, so he is probably eating the paleo caveman diet described by Wikipedia:
The modern dietary regimen known as the Paleolithic diet (abbreviated paleo diet or paleodiet), also popularly referred to as the caveman diet, Stone Age diet and hunter-gatherer diet, is a nutritional plan based on the presumed ancient diet of wild plants and animals that various human species habitually consumed during the Paleolithic era—a period of about 2.5 million years duration that ended around 10,000 years ago with the development of agriculture. In common usage, such terms as the “Paleolithic diet” also refer to the actual ancestral human diet. Centered on commonly available modern foods, the “contemporary” Paleolithic diet consists mainly of meat, fish, vegetables, fruit, roots, and nuts, and excludes grains, legumes, dairy products, salt, refined sugar, and processed oils.
Cavemen painting, courtesy of Orin Zebest via Flickr.
Not only Djokovic, but all of us are allergic to gluten and other food that has entered our diets during the last 10,000 years. We’ve had insufficient time to evolve to adapt to many of our tasty favorites, including potatoes, rice, wheat, pasta, beer, dairy (ice cream, milk, cheese, butter, yogurt), and excessively fat meat such as duck and lamb. Some deny this reality and point out that the majority of Europeans have developed a tolerance to lactose, even as adults, that has allowed them to exploit dairy farming while Africans and Asians cannot process lactose. Loren Cordain, author of The Paleo Diet, responds:
The many processed dairy products of the twentieth century are some of the richest sources of saturated fat in the typical Western diet. When you evaluate dairy products for fat percentage by calories, butter is the worst at 100 percent fat. Cream is 89 percent fat, cheeses average about 74 percent fat, and whole milk is about 49 percent fat. And most of the fats in these dairy products-about 60 percent-are the bad saturated kind. Despite their wholesome image, whole milk and fatty dairy products are some of the least healthful foods in our diets. Their saturated fats raise your blood cholesterol; they also raise your risk of developing heart disease and other chronic illnesses.
Some people believe that paleo humans were unhealthy, but this is a mistake. Paleo humans never died of heart disease or cancer or became as obese as Fred Flintstone. According to Cordain, modern high glycemic food is the culprit:
The “glycemic load” is the glycemic index of a food times its carbohydrate content. It is this high-glycemic load that elevates blood insulin levels in many people. High-glycemic carbohydrates cause large and rapid rises in blood glucose and have been implicated in a wide variety of chronic diseases-adult-onset diabetes, high blood pressure, heart disease, obesity, elevated blood uric acid levels, elevated blood triglycerides (the building blocks of fat, which float around in the bloodstream), elevated small-dense LDL cholesterol, and reduced HDL cholesterol. This cluster of diseases is known to cardiologists as “Syndrome X.”
Fish for sale at Japanese market, courtesy of Malias via Flickr.
I tried the caveman paleo diet and confirm that replacing sugar and saturated fat with protein and fiber, combined with an hour of daily exercise, will reduce weight because you spend much time in the bathroom excreting waste as an alternative to storing calories as fat. Even better, it feels miraculous because the food is tasty and you don’t feel as hungry as when eating ordinary food. However, it makes it very difficult to shop because you must reject 80% of the food in the grocery store, and much of the acceptable food, such as seafood and beef fed with grass, is expensive. And, it is even harder to eat in restaurants.
