Objective: to determine the change in the anthropometric parameters of the child and adolescent population which occurred during pandemic in boys and girls between 8 and 17 years of age, after the resumption of intermittent onsite academic activity.Materials and method: a total of 130 students from 8 to 17 years old were included, with the following measurements taken: bioimpedance using the InBody 170 scale, weight, lean mass, percentage of fat mass and total fat, and height in centimeters using an InBody ultrasonic measuring rod.Results: altogether, 36.1% of the population had excess weight with a predominance of overweight in females and obesity in males.The percentage of lean mass was 36.15%,below the range for age (found more often in males than females), while the percent of total fat mass was 40.76%, above the range for age and, finally, the percentage of total body fat was 59.23%, above the range for age, with males having more body fat mass than females.Conclusion: obesity and overweight have grown considerably in Colombian schoolchildren in the postpandemic era, not only due to increased body weight (which was higher than in the 2015 National Nutritional Situation Survey [ENSIN in Spanish] and increased more in this period than from 2010-2015), but also due to an abnormal body composition with a high predominance of fat mass, which increases the cardiometabolic risk associated with lipotoxicity.