Women have “saggy” upper arms, not because they fat, but because the muscles in their arms, are damaged.
Women tend to do most of their lifting, with the arms out to the side; for example carrying shopping bags or holding a child and hence, women develop the “saggy upper arms”.
This activity damages a large muscle in our back, called the “latissimus dorsi”.This muscle connects our lower back and hips, to our arms.It covers both sides of our middle back from our hips and is joined to our spine, just below our shoulder blades.It is from the “repair” of damage, at this “joining point”, below the shoulder blades; that our first, “stomach band” grows.The accumulating “loose debris” grows and droops around our body to form, the “top stomach roll” that sits, just below the breast.The “latissimus dorsi” also attaches to the “back of the “humerus” bone”; the bone in our “upper arm”.Through lifting, damage is equally caused; to a muscle in our shoulder blade, the “teres major”; and to a muscle in the back of our arm, called the “triceps brachii”.The “teres major”, connects our shoulder bone, the “scapula” to our arm and it also joins, in the “upper arm”, on to the “back of the “humerus” bone”.The “triceps brachii” is attached to our shoulder bone; but it too, also attaches on to the “back of the “humerus” bone.This muscle then connects along the whole length of that bone, until it crosses over the elbow and attaches onto one of the bones below, in the lower arm.
Once the “triceps brachii” muscle has seized and the “repairs” for the “three”, torn, “muscle to bone” connections, are in place; then our “protective padding” of “loose debris”, just grows and grows.Until soon, the weight of this bulk is too much for our skin to hold and “our upper arm sags”.