Weight Management and Adolescents For overweight children 7 and older, the initial goal is to keep them from gaining more weight. Changes in eating habits and exercise are gradually introduced to trim pounds. Determining Body Mass Index for Teens Although it is not a perfect measure, BMI gives a fairly accurate assessment of how much of your teen's body is composed of fat. Cholesterol, LDL, HDL, and Triglycerides in Children and Adolescents The cholesterol in blood comes from two sources: the foods your teen eats and his or her liver. The liver, however, makes all of the cholesterol your teen's body needs. Healthy Eating During Adolescence Encourage your teen to eat three balanced meals a day, with fruits or vegetables as snacks. Exercise and Adolescents Teens need at least 60 minutes of moderate to vigorous physical activity on most days for good health and fitness and for healthy weight during growth. Exercise Goals for Kids How much activity should your child get? What kinds of activity are important? Find out here. Diagnosing and Evaluating Heart Disease in Children Detailed information on diagnosing and evaluating heart disease in children Prevention of Heart Disease Starts in Childhood You may think of heart disease as a problem for adults, not your young children. But diet and exercise habits started in childhood can begin a lifetime of heart health, or a lifetime of heart damage.