Teen boys tend to lose body fat as they thin out. Teen girls should strive for a body fat percentage of between 21 and 23 percent; teen boys should aim for.
Individuals with the same BMI may have different amounts of body fat. BMI and the corresponding BMI-for-age percentile on a CDC BMI-for-age growth chart.
One place to start is by learning about body mass index, or BMI, a calculation that estimates how much body fat a person has based on his or her weight and height. For example, it's very common for teens to gain weight quickly — and see their BMI go up — during puberty.
Before adolescence average body fat is 18% in both boys and girls. the different needs of men's and women's bodies as a result of sexual development. You should be thin in terms of your body fat percentage (the percentage of your body.
Just like lifters need body fat reserves to increase muscle mass, you need them to grow. Going below 10% is seriously dangerous for a teenager. Assuming you have typical bodyfat distribution for a male they should be.