[wing-_-nuts]

The truth is that there are some things better experienced in younger years. I can't imagine backpacking across Europe is better in your 50's than it would be in your 20's, and if you're doing something with a chance of injury, you bounce back a lot faster the younger you are.

But I really think you're underestimating how active even the average 70 year old retiree can be.

[jimbokun]

That just comes down to luck.

Some people at 70 are in great health, some not so much.

[asdfasvea]

Disagree. Like financial independence, physical fitness in later years is something you can work towards and is well within nearly everyone's reach.

Granted, both take focus and long term discipline which people who lack both chalk up to luck.