Final answer:
For Lizzie's weight loss, a balanced nutritional plan with a daily caloric intake of 1200 to 1500 kcal, 1-2 pounds of weight loss per week, and a macronutrient allocation of 40% carbs, 30% protein, and 30% fat is recommended.
Step-by-step explanation:
The question relates to creating a sustainable weight loss plan for Lizzie who aims to reach 138 pounds from her current dietary consumption of 1800 kcal per day. Considering the necessity of a balance between nutrition and physical activity, it is crucial to determine an appropriate caloric intake, meal timing, meal planning, and macronutrient distribution to support her weight loss journey.
To ensure a gradual and healthy weight loss, setting the daily caloric intake to between 1200 and 1500 kcal while maintaining a balanced diet could be effective. For sustainable weight loss, a target of losing 1-2 pounds per week is recommended. This can be achieved by creating a deficit of 500 to 1000 calories each day, which translates to cutting back 3500 to 7000 calories per week, resulting in the desired weight loss. An example of a daily meal plan could be a 400 kcal breakfast, 600 kcal lunch, and 800 kcal dinner, spread out in a schedule that fits Lizzie's daily routine.
Moreover, focusing on macronutrient allocation, a balanced approach such as 40% carbs, 30% protein, and 30% fat can support her weight loss while also providing the necessary nutrients for health and satiety. She should also incorporate regular exercise into her plan to increase calorie burn and improve overall well-being.