You’re getting shorter
This is not a myth—losing height occurs as you age! You’re getting shorter because your bone mass decreases and the cartilage between your bones wears down. This doesn’t mean that your bones are in trouble, “but it can indicate a weakening of the muscles around your spine,” says Dr. Susan E. Brown of the Center for Better Bones. “Since bone and muscle work in one unit and typically gain and lose strength in synchrony, it’s likely that a loss in muscle is connected to an eventual loss in bone.”