In the past few decades, childhood obesity has become a public health issue in most developed and developing countries across the globe. Several behavioural factors that cause obesity in children include excessive intakes of calories from food, lack of physical activity, and prolonged sedentary behaviour. Obviously, these factors are related to the family, especially the way parents manage their children's weight in the family. In addition to providing food or choosing food for their children, parents also determine their children's daily routines, including sports activities, games, break, and sleeping time. Parents can be their children's role models and authority figures and help children to develop healthy habits, attitudes and ideas on eating and exercise participation. It is worth noting that many parents often adopt some "paradoxical" practices when raising their children, and this deserves our utmost attention.
The most common parenting practice for children with weight issues is to restrict the amount of diet and unhealthy food. Parents who adopt this kind of parenting practice may think that it is good for their children's health, but scientific research does not support this view. Studies have found that restricting children's consumption of certain foods can arouse children's attention to the food, thereby increasing their desire to acquire and eat those foods1. Therefore, in the short term, although parents restricting their children's diet can reduce the number of unhealthy foods and total calorie intake of their children, they will try their best to break through and consume these foods when they fall under the radar. Studies2 have found that when children are allowed to freely choose their favourite food from dozens of choices, they would prefer a high proportion of unhealthy foods. However, when children know that their parents will monitor what food they choose, they will reduce the amount of food they preferred, or choose fewer unhealthy foods. Since the studies have proved that restricting diet may have negative effects, parents need to use this strategy with extreme caution.