[gigster]

I'll soon be 58 years old and I'd probably take 2 minutes to do a 100-yard dash, or stagger if you will.

[stocksthatgoup]

We reach the limit 70 years ago. It was settled science!

[pieceofthepuzzle]

“I'll soon be 58 years old and I'd probably take 2 minutes to do a 100-yard dash, or stagger if you will.”

At 58, unless you have specific orthopedic issues, there's no reason you couldn't run a fairly quick 100 - if that's something you had any interest in. Don't embrace being ‘old’ in your 50s. I know plenty of people in their 80s who are running and biking long-distances races, who hike up mountains, and are generally very fit.