专家提醒：骤增骤减都不好，警惕暑期儿童体重波动大

Core Viewpoint - The article emphasizes the importance of balanced weight management and dietary health for children during the summer, highlighting the need for scientific and flexible approaches to avoid weight anxiety while monitoring significant weight fluctuations [1][2]. Group 1: Weight Management Guidelines - Experts recommend that parents record their child's weight weekly and measure height monthly, adjusting dietary and exercise plans if BMI changes exceed 5% over two weeks [2]. - The article introduces the "plate method" for healthy eating, suggesting that one-third of the plate should consist of grains and tubers, one-third of quality proteins, and one-third of vegetables, with deep-colored vegetables making up over 50% of the vegetable portion [2]. Group 2: BMI and Growth Monitoring - The article outlines the international standard for assessing children's weight using Body Mass Index (BMI), calculated as weight (kg) divided by height (m) squared, with specific BMI ranges indicating underweight, overweight, and obesity [1]. - It is noted that weight changes during the summer should not follow a fixed range but should consider factors like age, height growth, and body composition, particularly during puberty [1].