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That is so impressive! Takes some mental strength.

I think more mental - right?!

Well, obviously physical too, but staying on that dreadmill for such a long time requires a strong mind!

Dreadmill :) I'm with you on this one. It's just not natural :)))

Hey, excellent. How many kilometers were you able to cross without moving one inch further? :) It takes a special kind of mindset anyways. And persistence and stubbornness not to speak about physical ability at all ...

Marathons are a way to go too, great. I was a marathoner once and I intend to be again.

I did 84.1 miles (135km). I was aiming for 85 miles. I still broke the record by 4 miles, so that was good. Here's a video of the last couple minutes..