How to Gain Weight Healthily: Tips for Teens with Low BMI - Nutrition

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I am too thin?


I am 15 years old, almost 16, and I am a freshman in high school.
My BMI is only 14; I am 175.5 cm tall but weigh only 45.8 kg.
I do not have any dietary restrictions and eat three regular meals a day.
I have been very thin since childhood, but during my three years in middle school, I grew 25 cm, yet my weight did not increase much, making me look even thinner.
I would like to know what I should eat more of or what activities I can do to improve this situation.

Zheng Tongxue, 10~19 year old female. Ask Date: 2015/08/29

Dr. Cai Xiuwen reply Nutrition


Hello, if you are unable to gain weight, it is important to consider whether your caloric intake is too low, whether you are expending too much energy, or if there are any issues with digestion and absorption.
It is recommended that you ensure your main meals are sufficient, with at least 1.5 to 2 bowls of rice per meal, and to increase snacks between meals, such as milk or soy milk.
Is your bowel movement regular? If digestion and absorption are poor, you can increase the intake of digestive-friendly fruits, such as papaya and pineapple, or directly supplement with digestive enzymes and probiotics.
Appropriate exercise is necessary to aid intestinal motility, but excessive exercise without adequate caloric intake will not lead to weight gain.
Alternatively, you may visit a nutrition consultation clinic to work with a dietitian, who can help you keep a food diary and discuss a tailored dietary plan based on your eating habits.
Additionally, you may consult a physician to rule out any metabolic issues.
This response is provided by Dietitian Tsai Hsiu-Wen from Nantou Hospital, Ministry of Health and Welfare.
Wishing you safety and good health.

Reply Date: 2015/08/29

More Info


Gaining weight healthily, especially for teens with a low BMI, requires a strategic approach that focuses on nutrition and lifestyle changes. At 15 years old, with a height of 175.5 cm and a weight of 45.8 kg, your BMI of 14 indicates that you are significantly underweight. It's crucial to address this issue not just for aesthetic reasons, but for your overall health and well-being.


Nutritional Strategies
1. Increase Caloric Intake: To gain weight, you need to consume more calories than your body burns. Aim for a caloric surplus of about 500 calories per day to gain approximately 1 pound per week. This can be achieved by incorporating calorie-dense foods into your diet.

2. Choose Nutrient-Rich Foods: Focus on foods that are high in calories but also provide essential nutrients. Some examples include:
- Nuts and Nut Butters: Almonds, walnuts, and peanut butter are excellent sources of healthy fats and protein.

- Dairy Products: Full-fat milk, yogurt, and cheese can add calories and protein to your diet.

- Whole Grains: Foods like whole grain bread, pasta, and brown rice are not only filling but also provide energy.

- Healthy Oils: Incorporate olive oil, avocado oil, or coconut oil into your meals for added calories.

- Protein-Rich Foods: Include lean meats, fish, eggs, and legumes to support muscle growth.

3. Frequent Meals and Snacks: Instead of three large meals, try to eat five to six smaller meals throughout the day. Include snacks like trail mix, protein bars, or smoothies between meals to increase your caloric intake without feeling overly full.

4. Smoothies and Shakes: These can be a great way to pack in calories and nutrients. Consider making smoothies with fruits, yogurt, nut butter, and even oats for a calorie-dense drink.

5. Limit Empty Calories: While it might be tempting to consume junk food to gain weight, focus on healthy, nutrient-dense options. Foods high in sugar and unhealthy fats can lead to poor health outcomes and do not provide the necessary nutrients your body needs.


Exercise Strategies
1. Strength Training: Engaging in resistance training can help you build muscle mass, which is a healthy way to gain weight. Aim for 2-3 sessions per week, focusing on major muscle groups. Exercises like squats, deadlifts, and bench presses can be effective.

2. Avoid Excessive Cardio: While cardiovascular exercise is important for overall health, excessive cardio can burn calories that you need for weight gain. Limit cardio sessions to 1-2 times a week, focusing instead on strength training.

3. Stay Active: Incorporate physical activity into your daily routine, but focus on activities that promote muscle growth rather than just calorie burning.


Monitoring Progress
1. Track Your Intake: Keeping a food diary can help you monitor your caloric intake and ensure you are meeting your goals. There are various apps available that can assist with this.

2. Regular Weigh-Ins: Weigh yourself weekly to track your progress. If you’re not seeing results, you may need to adjust your caloric intake or exercise routine.

3. Consult a Professional: If you continue to struggle with gaining weight, consider consulting a healthcare professional or a registered dietitian. They can provide personalized guidance and ensure there are no underlying health issues affecting your weight.


Conclusion
Gaining weight healthily is a gradual process that requires patience and consistency. By focusing on nutrient-dense foods, incorporating strength training, and monitoring your progress, you can achieve a healthier weight. Remember, your goal should be to gain weight in a way that promotes overall health and well-being, rather than just focusing on the numbers on the scale.

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