Lack of exercise is a factor in becoming overweight. The bigger the kids get, the less comfortable it is to run and play which leads to decreased activity. Overweight kids in kindergarten can develop sleep apnea which leads to sleepiness during the day that effects attention and mood. Overweight children tend to become overweight adolescents who have an increased risk of developing type 2 diabetes, as well as heart, blood pressure and cholesterol problems. Overweight children often are self-conscious about their size which can affect their relationships with other children.