How can older adults lose weight scientifically and safely?

Weight Loss Methods for Obese Elderly People

Because the physical condition and health status of the elderly differ from those of younger people, their weight loss methods should also differ to better suit their individual circumstances.

The principle of weight loss is a combination of dietary control and physical exercise.

The first step in weight loss is to control diet. The actual calorie needs of the elderly decrease with age: 5% for those aged 40-49, 10% for those aged 50-59, 20% for those aged 60-69, and 30% for those over 70. Therefore, even healthy elderly people should consume fewer calories than middle-aged and younger people, while obese individuals should control their intake even more, eating only until they are 70-80% full, aiming for a steady weight loss of 1-2 kg per month until reaching the ideal weight range. Experience shows that slow weight loss is easier to maintain. Conversely, rapid weight loss is more likely to rebound. To resolve the conflict between food intake and feelings of hunger and satiety, a gradual reduction in food intake can be adopted. Reduce to 90% in the first month, 80% in the second month, and about 70% in the third month. You can also increase your intake of vegetables and fruits, and reduce your consumption of fried foods (fried foods have twice the calories of the same amount of food). This way, you reduce calories without significantly reducing the quantity. Gradually develop the habit of eating only until you are full, to achieve weight loss without a decline in physical fitness. Animal experiments have shown that appropriately restricting food intake, i.e., reducing animal calorie intake by 30-40%, can extend life expectancy by 10%. This indicates that appropriate food restriction not only does not harm health but is also beneficial to life.

Obese elderly people should first reduce their intake of animal fats, as fat has the highest calorie content, providing 9 kcal per day. Secondly, they should reduce their carbohydrate intake and eat more vegetables, keeping their total daily calorie intake below 1500 kcal.

Of course, for obese elderly individuals, while restricting their diet, attention should also be paid to nutrition. They should be provided with protein of high bioavailability, such as milk, eggs, fish, and lean meat, especially soy products. These are not only rich in protein but also beneficial for fat metabolism. These foods are low in cholesterol and contain a large amount of unsaturated fatty acids. Structurally, their carbon chains are more unsaturated than those of vegetable oils, thus being more beneficial to lipid metabolism.

To successfully lose weight, older adults must also engage in appropriate exercise. Only by persisting in physical exercise can they enhance their metabolism and overall health. According to the law of constant energy expenditure, for every 6.8 kcal increase in calorie consumption, weight decreases by 1 gram; conversely, the opposite is also true. Therefore, to accelerate weight loss and consolidate its effects, it is essential to strengthen physical exercise. Each fat cell in an obese person can weigh up to 1.5 micrograms; physical exercise can reduce this to 0.3–0.5 micrograms, while dietary control alone can only reduce it to 0.7 micrograms.

For obese elderly individuals, low-intensity, long-duration exercise is generally best for weight loss. Suitable methods include brisk walking, long-distance walking, jogging, swimming, table tennis, tennis, gymnastics, Tai Chi, cycling, and hiking.

Functional running is the preferred exercise. For example, an obese person weighing 80 kg could lose 0.5 kg per month by reducing their daily staple food intake by 100 grams and running 2-3 kilometers for 15-20 minutes daily, resulting in a weight loss of 5-5 kg ​​per year. The author of the American book "The Secrets of Fun Running," Ficks, weighed 99.8 kg. After several years of running, his weight returned to 72.2 kg, and he became a very healthy person again. Professor Zhu Guangqian of Peking University, at 83 years old in 1981, still enthusiastically climbed mountains in Chengde. At 85, he could still jog slowly with a cane or walk uphill and downhill.

Taking a walk after meals is not only a good habit for health but also a good way to lose weight. Researchers in New York, USA, monitored a group of students who exercised by walking and found that walking for 20 minutes at a speed of 4.8 kilometers per hour, about 45 minutes after a meal, can burn approximately 10-15% of the body's total calories. Therefore, they found that walking about 45 minutes after a meal is very beneficial for weight loss.

Cycling also provides a significant amount of exercise. In 1986, ten middle-aged and elderly people from Xi'an Military Medical University, with an average age of 53 and the oldest being 63, cycled from Xi'an and Mount Tai to Beijing, a journey of 1600 kilometers over 14 days. After this long cycling trip, their heart function was good, and they showed significant reduction in abdominal fat, with their average waist circumference decreasing from 81.5 cm to 78.9 cm.

Swimming is also a good way for the elderly to lose weight. For example, 57-year-old renowned American swimming coach Conselman was significantly overweight and suffered from hypertension at the age of 53. He swam for two hours every day, and as a result, he lost 28 kilograms after four years.

According to research by Japanese scholars, simplified Tai Chi, despite its low intensity, has both mental and physical benefits, and can play a role in preventing obesity in the elderly.

Combining diet control with physical exercise for weight loss is definitely effective. Here's another typical example: An American woman named Linda Quainsdem, weighing 128 kilograms, lost 80 pounds in 100 days following a weight loss plan combining a restricted diet and physical exercise. That's almost an average of one pound per day, for a total weight loss of 36.4 kilograms. She was still 21.6 kilograms away from her ideal weight, and confidently said, "I'm determined to continue losing weight; I'm sure I can reach my ideal weight."