Aside from his unfailing patience, I'll tell you his secret: on any given workout he probably runs twice as far as I do. Now you may ask, how is that possible, given that we go running together? Observe this map of a typical run:
I am the red lines, Joseph is the green. NO joke he runs zig-zags and circles around me while I struggle for life just to make it through our workout.
It kinda reminds me of Billy from the Family Circus:
[side note: I'm guessing that was not the original caption to this picture but it was the best one I could find to illustrate my point]
Sometimes when he has way too much energy I'll just point out a sign 100 feet away and say "sprint to that and back!" to let him to burn some of it off. So if I run 4 miles, chances are Joseph ran 7 or 8. This is why Joseph is gonna be ready for our marathon and I am not. Impressive much? Yeah, that's Joseph for ya :)