Nutrition and exercise for weight loss: Properly controlling diet and energy balance

2026-05-19

Nutrition and exercise for weight loss

Case study of weight loss through reasonable diet control

Mr. He, male, 50 years old, obese, suffers from hypertension, with unstable blood pressure and especially high blood lipids.

It's due to high triglycerides. I usually prefer strong-flavored foods, especially spicy ones, and I love meat. I also tend to use a lot of oil when cooking.

I enjoy barbecue and beer, often having beer and grilled skewers as a late-night snack. Later, due to work reasons, I had to stay away from these activities for an extended period.

Living in the south changed my eating habits and diet. I reduced my alcohol consumption by two-thirds, and my meals were less oily and lighter in color.

The diet is lighter, with more soup before meals and more vegetables, increasing the proportion of winter melon, cabbage, and corn consumed compared to before. (1 year)

I lost 7.5kg, my blood pressure stabilized, and my blood lipids also decreased significantly.

Analysis: Mr. He's obesity was caused by poor dietary habits and structure, and his blood lipid levels were high, particularly triglycerides.

Diet has the greatest impact on blood pressure, and a long-term high-salt diet is a major cause of hypertension. It can be said that Mr. He is a prime example.

The problems stemmed from what they ate. Therefore, when their diet was changed, all the problems were naturally alleviated.

How to properly consume cholesterol

Many people believe that cholesterol is entirely harmful, but this is a misconception.

Excessive alcohol levels can promote arteriosclerosis and increase the risk of cardiovascular and cerebrovascular complications in patients, but it also...

Cholesterol is an essential nutrient for the human body. It is a crucial component of cell membranes.

It is an important source of vitamin D and bile acids, which aid digestion and help with carbohydrate metabolism.

Compound metabolism helps in the secretion or production of female and male sex hormones.

Excess cholesterol accumulates in the blood

If this occurs in the blood vessels, it will increase blood viscosity and slow blood flow, thereby increasing the risk of cardiovascular and cerebrovascular complications.

The dangers that may occur. Studies suggest that cholesterol levels exceeding 180 mg/dL are detrimental to health; and if they exceed...

A dose of 260 mg/dl will increase the risk of heart disease.

Cholesterol doesn't just come from food; most of it is synthesized by the body itself. Therefore, limiting cholesterol...

Intake can only partially lower blood cholesterol levels. Therefore, limiting cholesterol is relative; the main...

It is suitable for patients with high blood cholesterol, such as those with blood cholesterol levels above 250 mg/dL, or those who have adverse effects on the body.

Patients with higher levels of harmful low-density lipoprotein (LDL) and lower levels of protective high-density lipoprotein (HDL) have lower levels of these proteins.

The WHO recommends that each person consume no more than 300mg of cholesterol per day, and that sensitive individuals should not exceed [a certain amount].

200mg. How much cholesterol is 300mg? It's equivalent to the cholesterol in one egg and 100g of pork liver.

The amount of cholesterol is approximately equal to that found in 125g of pork. Animal brains have the highest cholesterol content, generally exceeding [a certain amount].

200mg/100g, followed by fish roe.

A healthy diet should include reducing cholesterol and fat intake and increasing dietary fiber.

Increase intake of choline, inositol, and vitamin B₆. Generally, patients only need to reduce their intake of foods containing choline.

Foods high in cholesterol, such as animal organs, egg yolks, fish roe, shrimp, and crab, are acceptable. (Except for animal cholesterol...)

Besides alcohols, plants also contain cholesterol, but it is not absorbed much in the intestines and can help lower cholesterol levels.

Using it is beneficial and harmless to the body.

What is the relationship between energy metabolism and obesity?

A normal human body is always in a dynamic balance of energy metabolism: obtaining energy from food.

The body generates a quantity of energy, which is then used to maintain physiological functions (including physical activity). The human body has a very sophisticated system...

The body's regulatory mechanisms balance energy intake and expenditure, thus maintaining a stable weight.

The average adult consumes 800,000 kilocalories per year. Eating 5% more than that will lead to weight gain.

5.7kg. If energy intake exceeds energy expenditure, and this continues for an extended period, the excess energy will...

It is converted into fat in the body, thus leading to obesity. This metabolic imbalance can occur in two ways.

Life: Too much energy intake; too little energy expenditure.

The reasons for overeating in obese individuals are complex, including psychological, social, neurological, and endocrine factors.

Appetite and eating are influenced in several ways, primarily through the afferent signals mentioned earlier.

Leptin likely plays an important role. It is already known that in mice, if leptin production is prevented...

Alternatively, preventing the leptin receptor (the site of leptin's action) from responding to leptin can also produce [the desired effect].

Significant obesity. In obese individuals, the vast majority have elevated leptin levels, and...

Leptin levels are directly proportional to the degree of obesity; in some severely obese individuals, the leptin structure is altered.

Based on the assumption that obese individuals' leptin receptors (i.e., the site of leptin's action) do not respond to leptin,

Similar to insulin resistance, there is leptin resistance, which leads to overeating and causes obesity.

For obese individuals, insufficient energy expenditure is primarily due to a lack of physical activity.

What role does dietary fiber play in weight loss, and which foods...?

High in dietary fiber

Although the human body cannot directly utilize dietary fiber, it still plays a role in maintaining human health.

It has certain physiological functions. For example, dietary fiber can increase chewing in the mouth and stimulate saliva secretion.

It promotes intestinal peristalsis, increases stool volume and weight, softens stool, and improves constipation. It also shortens food intake.

This reduces the time it takes for feces to pass through the intestines, thereby reducing the contact time between carcinogens in the feces and the intestines, and affecting the intestinal flora.

Bacterial metabolism. Dietary fiber can also regulate lipid metabolism, increase fat excretion, and lower plasma cholesterol.

Alcohol increases bile acid secretion. It slows down carbohydrate absorption and lowers postprandial blood glucose levels. Increased alcohol intake...

The dietary fiber content in food can make people feel full more easily, thereby reducing calorie intake and benefiting their health.

Prevention and treatment of obesity, etc.

Dietary fiber plays a role in the prevention and treatment of various diseases, including weight loss. This is because...

A high-fiber diet can slow gastric emptying, increase satiety, and reduce the amount of food and calories consumed.

It can increase fat excretion, which is beneficial for weight loss and obesity control. However, it should be noted that...

Consuming large amounts of dietary fiber can cause bloating, increase the excretion of methane and fat in feces, and reduce...

The absorption rates of calcium, magnesium, zinc, and phosphorus can also affect serum iron and folic acid levels. Therefore, dietary intake...

More dietary fiber is not necessarily better; the right amount is best.

Dietary fiber is divided into two main categories: soluble and insoluble.

Soluble dietary fiber comes from pectin, alginate, konjac, etc.

Konjac is mainly produced in Sichuan and other parts of my country. Its main component is glucomannan, a type of soluble dietary fiber.

It has very low calorie content and is highly absorbent. Many studies have shown...

It is known that konjac has the effects of lowering blood lipids and blood sugar.

It has a good laxative effect. Insoluble dietary fiber.

The best source is whole grains, including wheat bran, oatmeal, whole wheat flour, brown rice, oats, and whole grains.

Grains, beans, vegetables, and fruits, etc.

How to cultivate good eating habits

Good eating habits are essential for achieving and maintaining ideal weight loss results. At the dinner table...

Some subtle details can often yield unexpected results.

Transform the "courage to leave food" into the "habit of leaving food." For those who have experienced hardship...

People during difficult times often cannot tolerate leftover food in their bowls or on the table, and will do everything in their power to avoid it.

Eating all your food, "so as not to leave any," is a bad habit that can easily lead to eating disorders and obesity.

This habit must be changed. It's best to take only a small amount of food at a time and finish it all.

(11. Centering the meal on rice, supplemented with various side dishes, this ensures sufficient nutrition while also achieving a feeling of fullness.)

(2) For those who eat quickly: Chew each bite more than 20 times; slowing down eating is beneficial for weight loss.

(3) It is essential to ensure at least three rounds of supervision at each stage, especially in the early morning, to guarantee balanced nutrition.

(4) Before the next meal, make it a habit to first drink a cup of tea to satisfy your hunger and thirst.

The central nervous system generates a feeling of fullness, which controls appetite.

(5) Unconsciously eating while doing things. Eating while doing things makes it difficult to concentrate.

It's easy to overeat without realizing it. Also, without focusing on appreciating the food, you might still eat more afterward.

The urge to eat more disrupted the diet plan.

Business travelers should avoid dining with people who eat quickly or have large appetites, as this can easily lead to complications.

Children are easily tempted to eat more, so it's important to keep them away from children's desserts to prevent yourself from losing control and grabbing them.

Come and eat.

(7) Do not cultivate habits that should be followed according to the year of birth. Do not place easily accessible food near your hat.

Especially snacks. Because snacks not only lack nutrition, but they can also easily lead to excess energy intake.

How to scientifically eliminate hunger

For obese people, losing weight is a very "painful" process; they can no longer eat as much of the foods they used to enjoy.

They dared not eat freely even when they could, and endured hunger every day, which was extremely difficult.

How can I control my appetite?

Those who want to lose weight must first correct their attitude towards weight loss and fully recognize that obesity not only affects appearance,

Furthermore, it can harm your health, so you must be determined to lose weight. And the first step in losing weight is to restrict your diet.

Start with your diet. Secondly, it should be recognized that a scientific diet for weight loss will not lead to malnutrition.

Overcoming the subconscious fear of weight loss hidden deep within one's mind is also necessary.

The human stomach is a volumetric organ; in the past, when too much food was ingested, it created a large volume, which is why it is now in use.

When using dieting, the sudden reduction in food intake can easily lead to a feeling of "not being full." However, only...

It takes a few days to adjust; once your stomach feels smaller, the hunger will lessen, thus strengthening your resolve to lose weight.

The following points may help eliminate hunger:

(1) Chewing slowly and taking longer to eat can reduce hunger.

(2) Replace high-energy foods with low-energy, high-volume foods, and eat more vegetables and whole grains.

It creates a large volume, thus eliminating the feeling of hunger.

(3) Distraction method: Avoid various factors that stimulate appetite, such as by doing more exercise,

Distract yourself from food by taking a walk or watching a movie.

(4) Drink more water, especially before meals, which will also help you eat less.

(5) Eat small meals and spread your energy out throughout the day, eating 4 to 5 meals a day. This helps maintain the stomach's capacity.

The amount is enough to prevent hunger.

(6) Some people's hunger is psychological rather than physiological, and it will subside after a period of time.

Once people adapt and develop new eating habits, this phenomenon will naturally disappear.

You May Also Like

Obesity: The number one threat to the health of Chinese people

The book begins by pointing out that obesity has become the primary threat to the health of Chinese people, closely related to serious diseases such as hypertension, diabetes, and stroke. Wang Longde, an academician of the Chinese Academy of Engineering, emphasizes that fat accumulation in arteries caused by obesity is a direct cause of stroke. Faced with such a serious threat, people need a...

2026-05-12

The interrelationships and consumption order of energy substances in the human body

This section explains the interrelationships of the three major energy-producing nutrients: protein, fat, and carbohydrates. They can work together and be converted into other nutrients, but the proportions must be appropriate. The body consumes energy in the following order: carbohydrates, fats, and then proteins. Understanding this order is crucial for scientific weight loss; blindly dieting...

2026-05-12

Fat synthesis and breakdown: from insulin to aerobic oxidation

This section explains in detail the synthesis and breakdown of fat in the body. Insulin is the key hormone that promotes the conversion of sugar into fat, while the breakdown of fat requires a series of complex chemical reactions, namely the tricarboxylic acid cycle, ultimately converting it into carbon dioxide, water, and energy. The breakdown of fat requires the participation of 38 enzymes...

2026-05-12