How do I become not skinny fat when Im 13 and a boy?

To improve your body composition and avoid being "skinny fat," focus on a balanced approach that includes strength training, cardiovascular exercise, and a nutritious diet. Aim to incorporate activities like weight lifting or bodyweight exercises at least 2-3 times a week to build muscle. Additionally, eat a variety of whole foods, including lean proteins, fruits, vegetables, and whole grains, while minimizing processed foods and sugary snacks. Staying active and maintaining a healthy lifestyle will help you develop a stronger, more toned physique.