With insufficient growth hormone, muscle and bone cells are not adequately renewed. Muscles and bones shrink and weaken. The body becomes weak, stiff and stooped. Body organs shrink and weaken. The lungs weaken.
Less oxygen is processed into the bloodstream.
Cells are deprived of oxygen. Lacking adequate oxygen, they are unable to produce sufficient energy. The body tires easily. With inadequate oxygen, the basic metabolism rate slows. Instead of food being converted into energy, it is stored as fat.