Well, in a few days I will be a meeting a sister of a close friend to go hiking in Banff National Park. I believe her sister is around 8-10 years older than my friend (54). This long time friend is also a long time cyclist, x-country skier ...and now also tennis player.

However her sister is different since she said sis has health issues, etc. I guess I've been accustomed to her having 2 other healthy, active siblings also in their 50's. I met them also.

Well anyway, I have a 51 yr. old sister whom I dearly wish she would be willing to go at least for hikes, etc. But she has some walking problems for long distances, when she developed a mysterious balance problem. But I don't advise her on exercise or anything. I know she is reasonably careful with her diet. She is single and child-free. We're just glad to spend time with one another. This is in contrast to 2 other sisters (43 & 48) who jog/do pilates often. These 2 sisters each, have several young to teenage children. My brother could use some exercise at 45 yrs., but his face still looks youngish. I think he went through a bout of jogging and lost some weight. But has regained it.

But none of us have yet developed any heart/respiratory problems. And we are all aware, because of our upbringing, on what /how a proper diet looks like. It's how we implement that um....knowledge.