Scientific Guide to Weight Loss: Exercise Contraindications, Comprehensive Precautions, and Obesity Prevention Strategies
Understanding the contraindications for physical exercise can effectively prevent the aggravation of pre-existing conditions or the occurrence of accidents during exercise. Common contraindications for exercise include: acute illnesses, including acute heart, liver, and kidney diseases, early stages of viral myocarditis, acute viral hepatitis, and the acute phase of pulmonary tuberculosis, etc. Activity should only resume after full recovery. This also includes muscle strains, joint sprains, and injuries occurring within 24–48 hours after trauma. Because the damaged tissues are not fully healed at this time, exercise may worsen the injury or trigger rebleeding.
Hemorrhagic diseases, such as leukemia and hemophilia, have a bleeding tendency, and exercise may trigger inflammation and bleeding. Febrile illnesses, such as influenza and acute pneumonia, cause elevated body temperature and are contraindications to exercise. Activity should be suspended after becoming ill until body temperature returns to normal and bodily functions recover. Patients with metastatic malignant tumors should not participate in high-intensity exercise. Whether or not someone with a serious chronic disease can participate in exercise cannot be generalized; a medical examination and stress test are necessary to determine an appropriate prescription. Regular exercise is permissible when the condition is stable and organs are in a compensatory phase.
Those with severe anemia, hyperthyroidism, or uncontrolled severe diabetes should suspend exercise. Patients with high myopia and glaucoma should avoid strenuous exercise to prevent retinal detachment. Furthermore, swimming and diving should be avoided until otitis media is completely cured, and patients with chronic nephritis should not engage in high-intensity exercise.
Appropriate physical exercise has a significant weight loss effect. To ensure safety and improve results, the following points should be noted: Consistency is essential; do not give up halfway. Have sufficient confidence and perseverance; avoid inconsistent effort. Weight changes may not be noticeable in the first few weeks, but this does not mean the effect is poor. Intensity, duration, and amount of food restriction should all follow a gradual approach. For overweight or mildly obese individuals, a weight loss rate within the range of 0.5 kg per week is very suitable and feasible.
While ensuring the supply of essential nutrients, calorie intake should be appropriately controlled. During exercise, pay attention to drinking enough water; don't wait until you're thirsty to drink. Metabolic processes occur in body fluids, and failure to replenish lost fluids promptly will affect fat breakdown. Exercise causes profuse sweating, and sweat contains ions; potassium and calcium ions are crucial for metabolism, so sports drinks containing ions can be prepared. Purified water should not be consumed during exercise, and carbonated beverages should be avoided altogether.
Body fat percentage and weight should be measured regularly to monitor progress and effectiveness. Those with the means should have liver function tests and ultrasound scans to confirm the health-promoting effects. Take precautions to prevent sports injuries; obese individuals experience significantly increased load on lower limb joints due to their excess weight. Adequate warm-up exercises are essential before exercise, including stretching. Post-exercise cool-down is also crucial, involving relaxation and stretching exercises to relieve muscle tension. If chest pain, chest tightness, or difficulty breathing occurs, gradually reduce intensity, stop exercising, and seek immediate medical attention.
Wear soft-soled shoes during exercise. Pay attention to keeping warm in the later stages; remove outer clothing after warm-up and put it back on promptly after exercise, rather than waiting until you are drenched in sweat or feel cold. Be mindful of the time interval between exercise and meals; avoid exercising immediately after eating, and also avoid eating immediately after exercising. Allow at least half an hour between the two. If you are unsure of your optimal intensity, start with a low intensity and gradually increase it, aiming for a target heart rate within 20% to 40% of your heart rate reserve. Generally, an intensity that leaves you feeling neither fatigued nor hungry after exercise is suitable.
Genetic factors are a predisposing factor for obesity. Aside from obesity secondary to disease, the root cause of simple obesity is excessive calorie intake coupled with insufficient physical activity. A combination of appropriate exercise and dietary control can achieve good results. The basic principle of obesity prevention is to maintain a balance between calorie intake and expenditure, ensuring the body receives adequate energy through dietary adjustments. Since adult obesity often begins in childhood, prevention should start in childhood. The period from age 7 to puberty is an excellent time to prevent obesity, and the possibility of endocrine-related obesity should be ruled out.
A reasonable diet means consuming a variety of foods, controlling the total amount, and ensuring a balanced diet. Reasonable physical activity means ensuring sufficient daily physical activity time, choosing activities that interest you, and determining an appropriate intensity. Exercise for treating obesity has many strict requirements; the energy for muscle contraction must primarily be provided by fat. Exercise for preventing obesity has less stringent requirements; as long as there is sufficient energy expenditure, it is acceptable, regardless of the type of energy source.