Word: diets
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...spears and clubs was a marathon undertaking--and then you had to hack up the catch and lug it miles back to camp. Climbing trees to find nuts and fruit was hard work too. In essence, early humans ate what amounted to the best of the high-protein Atkins diet and the low-fat Ornish diet, and worked out almost nonstop. To get a sense of their endurance, cardiovascular fitness, musculature and body fat, say evolutionary anthropologists, look at a modern marathon runner...
Nutritionally, the shift away from wild meat, fruits and vegetables to a diet mostly of cultivated grain robbed humans of many of the essential amino acids, vitamins and minerals they had thrived on. Average life span increased, thanks to the greater abundance of food, but average height diminished. Skeletons also began to show a jump in calcium deficiency, anemia, bad teeth and bacterial infections. Most meat that people ate came from domesticated animals, which have more fat than wild game. Livestock also supplied early pastoralists with milk products, which are full of artery-clogging butterfat. But obesity still wasn...
...more than an attention-getting device by a slightly smarmy man who rather lacks Michael Moore's bullying star quality. Face it, even in a nation where a quarter of the population eats at least once a week in a fast-food joint, mass emulation of his diet is unlikely...
Spurlock's critics--some of them paid operatives of the food industry--say it's no mystery that he gained weight force feeding himself Big Macs to the tune of 5,000 calories a day. One of his detractors put herself on an all-McDonald's diet and managed to lose 10 lbs. in 30 days, eating fewer than 2,200 calories a day. Her movie is due out in late summer...
...more likely than others to cut physical-education classes and strike franchise deals with snack-food and beverage makers. After school, working parents would rather their kids stay inside watching TV than play outside in unsafe streets. Those hours in front of the tube, meanwhile, feed them a diet of ads heavy on sugary cereals and greasy burgers. No wonder obese adolescents are twice as likely to come from low-income families...