Just like girls, during puberty, your body begins to grow faster. Some guys have uncomfortable growing pains in their arms and legs. How long this growth spurt lasts and how tall you'll be at the end of it depends on a lot of things â but mostly it has to do with how tall the other people in your family are.ow long this growth spurt lasts and how tall you will be at the end of it depends on a lot of things â but mostly it has to do with how tall the other people in your family are. During puberty, your breasts will change size and shape.
The pectorals are the two big chest muscles, and great pecs don't only look good, they are incredibly powerful. Focusing on this major muscle group 1-2 times a week is a big part of your workout routine, and it is easy to develop.
The chest is made up of two muscles: the pectoralis major and the pectoralis minor. The pecs are found attached to the humerus of the arm, right near the shoulder joint. The pecs then run across the front of the body and originate on the breastbone.