At a time when everything from sport utility vehicles to hamburgers comes “supersized,” the notion that less is more may seem out of date to some Americans.
But when it comes to calories, eating fewer just might be a prescription for a longer, healthier life.
The secret to longevity? I was fascinated to learn that the island of Okinawa in Japan is home to the highest percentage of centenarians (those aged 100 or older) in the world — 39.5 for every 100,000 people, compared to about 10 in every 100,000 Americans.
The Okinawa islanders consume a high-quality diet — mainly homegrown vegetables, tofu and seaweed; they also tend to live low-stress, active lives. Interestingly, while most Okinawans have protein and fat intakes similar to those of their fellow citizens, the Okinawans’ total calorie levels are 20 percent less than the Japanese national average.
So, is eating fewer calories — without being undernourished — the answer to longevity? In animals placed on low-calorie, optimal diets, the typical signs of aging — such as declines in immune function and loss of functional capacity — slowed down.
In the Biosphere2 experiment, participants living in a self-contained ecological space outside of Tucson had to eat a low-calorie diet after experiencing problems with crop cultivation. Though the original plan called for them to eat 2,500 calories per day, the subjects averaged only 1,800 calories a day for the first six months, then increased their intake to about 2,000 calories daily for the remaining 18 months.
The diet consisted primarily of vegetables, fruits, nuts and grains and modest amount of dairy, eggs and meat.
At the end of two years, participants not only had lost weight but also reduced their blood pressure, blood glucose, insulin, total cholesterol, low-density lipoprotein (“bad” cholesterol) and triglyceride levels, all of which when elevated are linked to the development of chronic disease.
Calorie restriction without undernutrition may turn out to be a prescription for a longer and healthier life. However, more studies are needed before firm conclusions can be drawn.
In the meantime, you can take small steps toward healthy lifestyle changes through proper eating habits combined with a comprehensive exercise pro- gram.
Here are some strategies you can use to reduce unnecessary calorie consumption without creating nutrient deficiencies:
——Make nutrient-dense foods, such as fruits, vegetables, beans and legumes, the mainstays of your diet.
——Eat meat occasionally but focus on leaner cuts. Try to include fish as a regular source of protein.
——Avoid foods that are high in trans-fat acids and partially hydrogenated oils, found in margarines and many processed foods. Minimize consumption of fried foods and butter, palm and coconut oils.
——Include some essential fats in your diet. Good sources include unsalted nuts (e.g., pecans, walnuts and almonds) and plant oils, such as canola and olive oils.
——Check food labels for ingredients, serving sizes and fat content so you know what you are eating.
——When evaluating calorie intake, don’t forget the “hidden” calories found in many beverages and condiments.
——To get the best results, combine any reduction in calories with an increase in physical activity. But don’t overdo it, especially if you are new to exercise.
http://sun.yumasun.c...story_17495.php
This post has been edited by whoa182: 01 July 2005 - 04:16 AM
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