Weakening of the ligaments, muscles and bones in your back lead to this disfigurement in many elderly people, particularly women. Osteoporosis, or thinning and weakening of the bones is the main cause. The strength in bones is due to the calcium they contain. The calcium is obtained from foods, particularly dairy foods. If a person’ s diet has lacked calcium for many years, the bones will not be a strong as they should be. Adding calcium later on in life cannot reverse the damage already present, but may prevent further damage developing. In women, hormones are vital for the correct calcium balance in the bones. When hormone levels drop at the menopause, the calcium starts to leech out of the bones. As a result, doctors prescribe hormone replacement therapy for most women after the menopause.