My mother is 98 now and was like that when she was about 90. Things started going downhill when she was 92 and had a hip replacement and I watched her take her first steps after the replacement! I had a knee replacement two years later and I'll tell you, when they first stood me up and made me walk I kept telling myself if she could go through a hip replacement at 92 I could go through a knee replacement at 56! She's in assisted living and talks about how she's the third oldest there, but the other people aren't in good shape like she is! She's in a walker, on oxygen for emphysema and has only 15" of her colon due to colon cancer!