Exercise & Burns
1.
If the arm is burned by hot water and it is classified as a second-degree burn, how should it be treated to avoid scarring?
2.
If cycling for 100 minutes each morning and evening at a speed of 20 km/h, how many calories will be burned? If this level of exercise is maintained daily and there is no weight loss (with the same dietary intake as usual), how should the diet be adjusted to promote weight loss?
Shen Wang, 20~29 year old female. Ask Date: 2002/08/03
Dr. Xie Huimin reply Nutrition
Hello: Thank you for your letter! For your first question, I suggest you consult a dermatologist or a plastic surgeon for a better evaluation.
Regarding the calories burned while cycling at a speed of 20 km/h, the calorie expenditure is approximately 9.7 kcal per kilogram per hour.
Therefore, if your weight is 50 kg, the calories burned in one hour would be 50 * 9.7 = 485 kcal.
To lose weight, it is important to avoid sugary foods, such as ice cream and sweetened beverages (like bubble tea), among others.
Additionally, we should control our fat intake.
Foods that are deep-fried, such as pan-fried buns, soup dumplings, and egg pancakes, should be consumed in moderation.
If you are managing your diet well but your weight remains unchanged, I recommend trying a different form of exercise, as it may yield better results! If that still does not help, you may need to visit a metabolic clinic for further evaluation.
Thank you, Hui-Min Hsieh.
Reply Date: 2002/08/03
More Info
Managing burns and weight loss effectively requires a comprehensive understanding of both injury care and nutritional strategies. Let's address your questions step by step.
1. Managing Second-Degree Burns
If you have sustained a second-degree burn from hot water, it is crucial to treat it properly to minimize the risk of scarring. Here are the steps you should follow:
- Cool the Burn: Immediately place the burned area under cool (not cold) running water for 10-20 minutes. This helps to reduce the temperature of the skin and alleviate pain. Avoid ice or very cold water, as this can further damage the tissue.
- Clean the Area: After cooling, gently clean the burn with mild soap and water. Avoid scrubbing the area to prevent further irritation.
- Apply a Dressing: Use a sterile, non-stick bandage to cover the burn. This protects the area from infection and further injury. Change the dressing daily or if it becomes wet or dirty.
- Moisturize: After the burn has cooled and cleaned, applying a burn ointment or aloe vera can help keep the area moist, which is essential for healing.
- Avoid Picking: Do not pick at blisters that may form, as this can lead to infection and scarring.
- Monitor for Infection: Watch for signs of infection, such as increased redness, swelling, or pus. If these occur, seek medical attention.
- Consult a Specialist: If the burn is extensive or does not heal properly, consult a dermatologist or a burn specialist for further treatment options.
2. Weight Loss and Caloric Expenditure
Regarding your exercise routine, cycling for 100 minutes at a speed of 20 km/h can burn a significant amount of calories. The caloric burn can be estimated using the following formula:
- Caloric Burn Calculation: The average caloric burn for cycling at a moderate pace (around 20 km/h) is approximately 9.7 calories per kilogram of body weight per hour. For example, if you weigh 70 kg, the calculation would be:
\[
\text{Calories burned} = \text{Weight (kg)} \times \text{Calories per kg per hour} \times \text{Duration (hours)}
\]
\[
\text{Calories burned} = 70 \, \text{kg} \times 9.7 \, \text{cal/kg/hr} \times \frac{100 \, \text{min}}{60 \, \text{min/hr}} \approx 1135 \, \text{calories}
\]
Despite this significant caloric expenditure, if your weight remains stable, it may be due to several factors:
- Caloric Intake: If your caloric intake matches or exceeds your caloric expenditure, weight loss will not occur. It’s essential to track what you eat and ensure you are in a caloric deficit.
- Metabolic Adaptation: Prolonged periods of dieting can lead to metabolic adaptation, where your body becomes more efficient at using energy, thus burning fewer calories at rest.
- Muscle Gain: If you are engaging in strength training or high-intensity workouts, you may be gaining muscle mass, which can offset fat loss on the scale.
Dietary Adjustments for Weight Loss
To effectively lose weight while maintaining your exercise routine, consider the following dietary strategies:
- Balanced Diet: Focus on a balanced diet rich in whole foods, including lean proteins, whole grains, healthy fats, and plenty of fruits and vegetables. This will ensure you get the necessary nutrients without excessive calories.
- Portion Control: Be mindful of portion sizes. Using smaller plates and measuring servings can help control caloric intake.
- Limit Processed Foods: Reduce the intake of high-calorie, low-nutrient foods such as sugary snacks, fried foods, and sugary beverages.
- Stay Hydrated: Sometimes thirst is mistaken for hunger. Ensure you drink plenty of water throughout the day.
- Regular Monitoring: Keep a food diary or use apps to track your caloric intake and exercise. This can help identify patterns and areas for improvement.
- Seek Professional Guidance: If you continue to struggle with weight management, consider consulting a registered dietitian or nutritionist who can provide personalized advice based on your specific needs and goals.
In conclusion, managing burns requires immediate and appropriate care to prevent complications, while effective weight loss hinges on a combination of exercise, dietary adjustments, and monitoring. By taking a holistic approach, you can achieve your health goals while ensuring proper recovery from injuries.
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