The dangers of repeated weight loss and rebound: accelerated aging and damage to health.

**The Dangers of Repeated Weight Loss and Rebound**

The World Health Organization proposes three principles for healthy weight loss: no diarrhea, no dieting, and no fatigue. Violating any of these principles is harmful to health. There are many methods for weight loss, and overweight people have tried numerous, but the results are often disappointing. They might manage to lose a little weight through starvation, only to gain it all back immediately. Weight loss, rebound, more weight loss, more rebound... this weight gain severely damages the self-confidence of many overweight people. The rebound from dieting, the side effects of weight-loss drugs, the difficulty in sticking to exercise, and the lack of noticeable results from various methods all contribute to this cycle of weight loss, rebound, more weight loss, and more rebound... leading us into a deep-seated misconception about weight loss. Faced with the beautiful figures of others, the attractive clothes in shopping malls, and the temptation of colorful and delicious food, overweight people are still painfully struggling with the question of whether to eat or not, constantly chanting about losing weight, while the excess fat on their bodies continues to increase. Weight loss has become a source of distress for these people.

Significant and repeated weight fluctuations can accelerate aging. Almost every overweight person has experienced weight fluctuations, gaining and losing weight repeatedly, creating a vicious cycle. Some women often start dieting when they gain weight, only to gain it back quickly, leading to a vicious cycle of weight gain and loss. This cycle is very harmful because it accelerates aging, especially affecting the skin, which becomes loose, loses its luster and elasticity due to repeated weight loss. This is the external manifestation of repeated weight loss, but the internal aging process is invisible. Repeated weight loss can disrupt the body's endocrine and metabolic functions, leading to decreased bone density, muscle loss and laxity, making it difficult to maintain lean body mass, and accelerating the aging process of internal organs. For men, significant weight changes can also accelerate the decline in testosterone levels, making them more prone to aging. Thomas Travison, a researcher at the New England Research Institute in Massachusetts, believes that as men age, their testosterone levels decline, which is a major reason why middle-aged and older men are prone to osteoporosis, muscle relaxation, and erectile dysfunction. The institute conducted a 15-year follow-up study of 1,667 male volunteers with an average age of 40-70. The results showed that significant weight gain leads to a decline in testosterone levels equivalent to the decline over 10 years of aging. The study found that testosterone levels decline by an average of 14.5% every 10 years; however, for healthy men with stable weight, the decline was only 10.5%, confirming the relationship between being overweight and aging.

Besides aging, significant weight fluctuations have a substantial impact on health. Repeated weight gain and loss can affect the body's immune system. Research from the Washington Medical Center in the United States shows that repeated weight loss can impair immunity, reducing the immune cells' resistance to colds, infections, and early-stage cancer cells. Compared to people whose weight remains relatively stable over a long period, those whose weight fluctuates more than five times have nearly one-third less activity of their natural killer cells. A recent study published in the *New England Journal of Medicine* by Kerry Bronell and colleagues, psychology and weight science experts at Yale University, indicates that people with repeated weight fluctuations, regardless of their starting weight, have an increased mortality rate and are twice as likely to die from heart disease. David Williamson, a nutrition expert at the Centers for Disease Control and Prevention, found that people whose weight fluctuates by more than 11 kilograms have a higher premature mortality rate than smokers.

Recently, an analysis showed that 5% of people are numb to the idea of ​​losing weight because they're overweight, 10% are too lazy to even start, 20% give up after a few days, 30% stop after two weeks due to social engagements, and another 30% give up because of persuasion from family and friends. What I want to say is that weight loss isn't the goal; health is the ultimate goal. If you truly want to be thin and healthy, you must bravely begin and patiently persevere. Only then can you achieve a fulfilling life!

Reports indicate that nearly half of women in the United States diet to lose weight, and half of these women were not overweight to begin with. Studies show that repeatedly gaining back 2 kg after dieting, only to lose another 2 kg, more than 10 times, is more harmful to the body than losing 20 kg in one go. This is particularly true for women aged 30-44, who are most likely to diet. Research also shows that the earlier abnormal weight fluctuations occur, the greater the damage to the body. The increased mortality rate in people experiencing significant weight fluctuations stems from three main factors: First, factors that exacerbate heart disease, such as abnormalities in blood cholesterol, blood pressure, and blood sugar levels due to weight changes. Second, changes in the quantity and distribution of body fat; when losing weight, muscle tissue is lost along with fat, while gaining weight is almost entirely fat, with no muscle recovery. This newly gained fat tends to accumulate in the abdomen, and abdominal fat accumulation is associated with increased overall mortality and heart disease mortality. Third, when people resume a normal diet after a period of dieting, they often prefer animal foods with high fat content (animal experiments have also found that animals whose weight fluctuates between gain and loss prefer to eat foods with high fat content), and a preference for high-fat foods can also cause other diseases.

Scientists warn that fluctuating weight can significantly accelerate aging, damage our bodies, and even shorten our lifespan.

**Weight Loss Precautions**

1. Exercise can boost your body's basal metabolism. Sweating will consume some water, so you need to replenish it with plenty of water.

2. Don't eat too much after exercising; consistency is key to good exercise.

3. Control your calorie intake by consuming low-calorie, well-balanced foods. With a balanced diet, you'll burn fat; otherwise, you'll only lose muscle. You also need to consume essential nutrients, such as a glass of milk every morning.

4. Arrange your three meals reasonably. For breakfast, eat only high-fiber oatmeal and low-fat milk. This will not only help with bowel movements, but is also very nutritious and healthy.

5. Try to eat your favorite foods that are easy to gain weight before noon.

6. Don't skip dinner. Eat it a little earlier and make it more substantial. Dinner can be light, with vegetables making up the majority.

7. Don't sit for half an hour after eating; walk around instead. Standing for at least half an hour after meals can prevent fat from accumulating on your lower abdomen and save you the trouble of trying to fix it later.

8. Don't go to bed too early, and absolutely do not eat anything within 3 hours of bedtime. A major no-no for weight loss is eating before bed. When you sleep, your body doesn't need to move, so everything you eat will be absorbed and stored as fat. If you're unbearably hungry, you can only eat a small amount of boiled vegetables or fruit.

9. The fastest way to lose weight is unlikely to produce lasting results, and some methods may not even produce rapid weight loss. Therefore, dieters are advised not to blindly follow advertisements for weight loss products.