If you are a woman and over 50 years of age, chances are high that you may fracture your wrist, hip or backbone just by lifting your suitcase! The worst part is that your doctor may not give you a diagnosis. Most likely these kinds of mishaps are seen as signs of ageing. This is how osteoporosis strikes. The bones snap at the slightest thrust and you would pass it off as a muscle pull. Repeated fractures send you for tests that reveal decreased bone density. Refer to an example in the link: Daily Mail
It is very essential to get your bone density checked regularly if you are over 50. Also take adequate supplements for bone health.