Effects of Intermittent Dietary Restriction on Cardiometabolic Risk in School-aged Children

"Intermittent dietary restriction will include the ILCD and ICR, which will be self-administered interventions in daily lives. The ILCD intervention will ask participants to restrict carbohydrate intake to ≤ 50 g/d on two consecutive or discontinuous days per week. The ICR intervention will ask participants to restrict caloric intake to 600 kcal/d for boys and 500 kcal/d for girls on two consecutive or discontinuous days per week.~At baseline, participants will receive face-to-face oral dietary instructions (e.g., principle of dietary restriction, sample menus, food list with macronutrients). Participants will receive the intervention booklets containing dietary advice and sample menus for diet according to the requirements of the dietary intervention.~Participants will be required to record dietary and physical activity data on a regular basis. The total intervention duration will be 12 months, including a 3-month intervention phase and a 9-month self-maintenance phase."

General health education based on dietary and physical activity guidelines for Chinese children and adolescents, will regularly send offline and online promotional materials to participants.