... until my Mum was diagnosed with osteoporosis in early 2008 she was generally fit and healthy. She couldn't sit down for more than 5 minutes before she would say "Well, this won't do" and she'd be up out of the chair to do something or other. She was busier than ever after she retired it seemed.
It's hard to remember the exact order things happened in but it seems to me that the osteoporosis diagnosis was the start of the journey that led to the PSP diagnosis as it was the first time Mum had been to see the Dr in years. Much to her chagrin, Dad (& my sis?) went in with her and instead of just talking about an itchy scalp (Mum's reason for going!) they listed all the concerns that we had about her. This led to various referrals and the excellent neurologist. Since then there have been a number of health issues starting with a bowel problem then a hysterectomy, a TIA and a broken leg.
Osteoporosis and PSP are not a good mix although Mum has had relatively few falls and only one which resulted in a fracture. Once is enough though!