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.
Letâs see what the chest muscle architecture tells about how many exercises you need for your chest. Pectoralis Major & Minor: Pectoral major is the largest and the major muscle of the pectoral group, and hence the common name pecs for the chest. Pectoralis minor runs under the pectoralis major and is hidden.